Fable 5.2 is now available in the Claude Platform and Claude Code.

It’s up to 30% faster than Fable 5.1, and costs $8/$40 per 1M tokens, down from $10/$50. https://t.co/mHGJNRbIZS

— ClaudeDevs (@ClaudeDevs) November 9, 2026

Claude Fable 5.2 & Mythos 5.2

These models generate outputs up to 30% faster than Claude Fable 5.1 and Claude Mythos 5.1 models. Fable 5.2 and Mythos 5.2 also come with an optional fast mode, which speeds up token generation by up to 2.5 times. Fast mode is available for $16 per million input tokens and $80 per million output tokens.

During evaluation, it was revealed that Claude Fable 5.2 and Mythos 5.2 models were a step above Opus 5.5 in almost all the capabilities evaluated: Coding, Cybersecurity, Protein design, Agentic Search, Computer use, Robotics, Knowledge work, Multidisciplinary reasoning and visual chart recognition.

For the model underlying Claude Fable 5.2 and Claude Mythos 5.2, Anthropic’s pre-deployment safety work included alignment training and testing, newly designed evaluations on the model’s propensity to take unhelpful actions, building stronger safeguards against misuse, and scaling up our behavioural monitoring.

The company tested Claude Mythos 5.2 on its automated behavioral audit, which tests how a model behaves across approximately 1900 scenarios. Claude Mythos 5.2 performed as well as, or better than, Opus 5.5, Sonnet 5.5, and Claude Mythos 5.1 on most measures. Hallucinating inputs, falsely claiming to have completed a task, omitting important information, and failing to disclose bad or lazy work were all lower in Claude Mythos 5.2.

Safeguards

• Cybersecurity and biology safeguards: Consistent with previous Claude Fable models, Fable 5.2 comes with safety classifiers that block high-risk cyber activities, including penetration testing, exploit generation and binary-based vulnerability, as well as most tasks in research biology. Based on early testing across claude.ai, Claude Code, and Cowork, the company observed about 55% fewer blocks with Fable 5.2 compared with Fable 5.1- about 60% fewer in cybersecurity and 40% fewer in biology. Claude Mythos 5.2 is available to vetted organisations that work in these dual-use areas.
• AI Research and development: The model that underlies Claude Fable 5.2 and Claude Mythos 5.2 is a step forward in general capabilities. In relevant areas, including accelerator kernel optimisation and improving large language model architectures, Fable 5.2 and Claude Mythos 5.2 perform at about the level of Opus 5.5. The models also include transparent fallbacks to Opus 5 for a small set of topics in this domain, including kernel development on certain nonstandard accelerators.
• Anti-distillation: Fable 5.2 has the strongest protections against distillation of any model the company released.

Powerful models like Claude Fable 5.2 and Mythos 5.2 rely on safeguards that monitor a window of usage data. Eligible customers can continue using Claude Fable 5.2 and Mythos 5.2 with zero data retention before implementing safety monitoring with Enterprise Frontier Safeguards. For other customers, the company has 30-day retention for safety monitoring.

Availability

Claude Fable 5.2 is available on all platforms including Amazon Web Services, Google Cloud, and Microsoft Azure. Developers can get started with claude-fable-5-2 on the Claude Platform.

The company is giving subscribers this week on eligible paid plans extra Fable usage. Plans and seats that include Fable models get one to three Fable resets based on how long they’ve subscribed, and Fable is included for up to 50% of weekly usage limits for Pro plans and standard seats on the Team plan.

Fast mode for Claude Fable 5.2 and Claude Mythos 5.2 is available on Claude Code, the Claude Platform, Claude Models on Google Cloud, and Microsoft Foundry. Access to Claude Mythos fast mode is available only to organisations who are past of Anthropic’s Verification Programs.

The models are available for $8 per million input tokens and $40 per million output tokens.

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Message threads are now in public beta on the Messages API.

The API caches your conversation on the server between turns, so instead of resending the full conversation, you send only new messages and the previous message ID, and Claude starts responding sooner. pic.twitter.com/VeiehyqfIg

— ClaudeDevs (@ClaudeDevs) November 2, 2026

Message Threads on the Claude Platform

A coding agent might make hundreds of requests in one session, each request resends every earlier message and tool result. Once a conversation reaches hundreds of thousands of tokens, resending all of it adds time before Claude starts responding.

With message threads, agents send only what’s new since the last turn, which reduces time to first token (TTFT). With message threads on by default for most Claude Code users, requests with 500k to 1M tokens see median TTFT drop by about 35%.

To use message threads, add the thread parameter to Messages API requests. The first request includes the full conversation and starts a thread. Each request after that includes only the new messages and the ID of the previous response.

A thread expires 5 minutes after its last request, and your client then resends the full conversation to start a new one. While each request is smaller with message threads, Claude still reads the full conversation on every turn, so token usage stays the same.

Message threads is best for active sessions where latency matters, including:

• Long-running coding agents, where each tool result or file edit adds to the conversation.
• Computer use agents, where screenshots stay with the thread instead of being re-uploaded on every turn.
• Document- and image-heavy workflows, where requests are made smaller.

Availability

Message Threads is available now in public beta on the native Claude Platform, on Claude Platform on AWS, Claude in Microsoft Foundry, and on Claude Models on Google Cloud (Anthropic managed). Standard Claude token rates and existing rate limits apply.

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We’re renaming our Max plans:

Max 5x → Max
Max 20x → Ultra

Max is still $100/month, and Ultra is still $200. If you’re a subscriber, there’s nothing you need to do.

We’re also removing the 5-hour limit for verified Ultra accounts, starting today with most existing… pic.twitter.com/9QR5ASBbeb

— Claude (@claudeai) October 30, 2026

Claude renames its Max plans; five-hour limit removed from verified Ultra accounts

The Max 5x is renamed Max, and the Max 20x is renamed Ultra. The Max plan is still $100/month, and Ultra is still priced at $200/month, with no action required for existing subscribers.

The Ultra plan includes 10 times the Pro plan’s usage every week and has no five-hour limit for verified accounts. Newer accounts keep a temporary limit until they’re verified, which helps the company prevent abuse and fraud. Users will get an email when the limit is removed. Weekly limits remain unchanged.

The company automatically verifies Ultra accounts using factors like your account and payment history. It is specified that additional usage limits may apply to manage capacity and ensure fair access to all users. For example, Claude may limit your usage in other ways, such as weekly and monthly caps or model and feature usage, at its discretion.

Stay tuned to The Tech Outlook for the latest tech updates!

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New in Claude for Legal: a gallery of ready-made artifacts for contract review, regulatory horizon scans, cite checks, and more.

Start from the built-in example, add your own documents and connectors, and share it with anyone across the business. pic.twitter.com/Wn2VK2HeMU

— Claude (@claudeai) October 28, 2026

Claude artifacts for legal work

Artifacts are interactive tools, such as trackers and dashboards, that teams can use and share in Claude. The company’s new legal gallery includes artifacts for specific tasks, such as reviewing a stack of contracts, tracking regulatory changes, and taking in legal requests from the business.

Each artifact opens with an example, so legal professionals can see how the work comes together before adding their own data and connectors. Each answer or output has a link to its source.

What’s in the gallery?

• Cite check compares a legal document with its sources and flags quotes that don’t match, wrong page numbers, and sources that don’t support the claim.
• Jurisdiction survey matrix compares a legal topic, such as data breach notice rules, across states or countries in one table, with links to the underlying law.
• Matter board turns engagement letters, emails, or spreadsheets into one board of open matters, showing the owner, next step, and next deadline.
• Playbook deviation board compares contracts with your company’s standard terms, flags each clause that differs, and sends it to the person who approves exceptions.
• Regulatory horizon scan maps upcoming regulations on a timeline, based on your company’s business and where it operates, and ranks them by impact with links to the sources.
• Tabular review builds a table from a set of contracts, showing the terms you ask about, such as severance or non-competes, with links to the exact language.

Legal professionals can ask Claude to tailor artifacts to their team and use connectors to bring in their playbooks or research sources, so nobody has to upload documents manually. Since the company launched Claude for Legal, it has added more than 60 legal connectors, including Bloomberg Law, Filevine, Ivo, Legora, and Patlytics.

Artifacts enable collaboration inside and outside the organization. A legal team can work on an artifact with colleagues across the business or with clients and partners, with sharing settings that ensure privacy and support ethical walls between teams.

The company has partnered with legal tech companies and law firms to build artifacts for legal professionals:

• AI Governance Benchmark built by Goodwin
• Harvey Intake built by Harvey
• Obligations Checker built by Foley & Lardner
• Subpoena Response Tool built by PwC

The gallery includes nine access-to-justice artifacts, five of which were built by nonprofit and public interest organisations we supported with Claude credits:

• Criminal Charge Reality Check built by Zealous (opens in new tab) takes a criminal charge and shows defense teams the sentencing range, public data on how those cases usually end, and standard playbooks for release. New York only.
• Immigration Papers Reader, built by Mobile Pathways (opens in new tab), turns a client’s immigration paperwork into a plain-language first read of key dates and missing documents.
• Rent Ledger Reviewer built by Rising for Justice (opens in new tab) helps attorneys find errors in a landlord’s rent ledger when preparing an eviction case. Based on D.C. law.
• Record-Sealing Screener, built by Rising for Justice (opens in new tab), helps attorneys assess whether a client’s criminal record is eligible for sealing. Based on D.C. law.
• Record Clearance, built by The Access Project (opens in new tab), helps legal aid teams work out whether a client’s record can be cleared under their state’s rules.

Availability

Legal teams can browse the gallery in Claude or start from the company’s Claude for Legal page.

To plan a rollout for your organisation, talk to Anthropic’s sales team or work with one of their implementation partners, including Accenture, AnswerRocket, Caylent, Deloitte, KPMG, Lazer, Perficient, phData, Protiviti, Provectus, PwC, Sia Partners, and Tenex.

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We’re opening a research preview of Claude Duet, a new app where Claude works as a proactive agent.

It comes to you with what needs your attention, completes tasks you ask of it, keeps working when you step away, and checks with you before it acts on your behalf. pic.twitter.com/kt8gAbWuX8

— Claude (@claudeai) October 21, 2026

Claude Duet

Claude Duet is designed around Claude Opus 5.5 and built to be resourceful and to decide what needs you, what can wait, and when to check with you first. Each morning, it sends you a short brief on the most important items across your connected apps. Throughout the day, it keeps tabs on those apps and messages you only when something needs your attention.

You can also hand it tasks of all shapes- from simple administrative tasks of scheduling meetings to more complex ones, such as building dashboards with a dozen tools, creating financial or sales forecasts, prototyping, and building web apps.

Safety and discretion are built into this app:

• Claude Duet draws on Anthropic’s framework for trustworthy agents(opens in new tab), which also guides agents like Claude Code and Claude in Chrome.
• Claude Duet’s handling of credentials follows the design the company uses for Claude Managed Agents(opens in new tab), so it never directly sees your passwords or sign-in tokens.
• Actions are approved by Anthropic’s auto mode classifier(opens in new tab), the same safeguard that protects Claude and Claude Code from taking steps you didn’t ask for.
• Claude Duet’s defences against hidden instructions and prompt injection come from the company’s browser-use research(opens in new tab), and its models and safeguards also cover this more broadly.
• Anthropic runs adversarial tests for Claude Duet’s security infrastructure. Red teams and an external firm penetration-tested Claude Duet, and it’s covered by the company’s public bug bounty program(opens in new tab).

The app is released with a new dedicated classifier and safety system prompt that checks each message and guards against leaks of sensitive information. This new classifier and prompt are designed to reject requests to share the strictest tier of information, including credit card numbers and government identification.

Other sensitive information, such as health or personal finances, is let through only when you’ve explicitly instructed Claude Duet to send it.

Anthropic’s team is already using Claude Duet, and the company gave small business owners and entrepreneurs early access to the app; some have been using it to help run their businesses.

How does Claude Duet work?

Claude Duet carries over your memory, skills, and connected apps from your Claude account, so setting it up requires minimal work. Claude Duet has a virtual machine with its own browser, so it doesn’t require your laptop or phone to be on. Describe a task in a short message, and it works out which apps to use and what steps to take in the background. You’ll receive a notification when the task is complete or needs your review.

Claude Duet checks your connected accounts every few hours because checking nonstop would use up your plan’s limits much faster. You will receive a message when something needs you. The company is continuing to test its judgment about when to message you.

Claude Duet reads, drafts, and prepares work on its own. But before it sends a message, makes a payment, signs a document, or deletes anything, it shows you exactly what it’s about to do and waits for your approval. A few things are off-limits even with your approval, like trading securities or moving money between accounts. You’re also able to disconnect any app Claude Duet has access to.

The app can connect with the tools your business runs on. Claude Duet can use the over 6,000 connectors and plugins in the Claude Marketplace to:

• Find the Gmail and Slack messages you’ve missed and help you reply.
• Check Intuit QuickBooks or Stripe for unpaid invoices and draft reminders.
• Prepare and run payroll in Gusto, with hours, bonuses, and reimbursements filled in.
• Draft a job posting and, once you edit and approve, post it to LinkedIn.
• Help prepare agreements and send them for review and signature through DocuSign.
• Draft follow-up emails using the contact and deal history in HubSpot.
• Turn your product launch into a social campaign in Canva.
• Set up, design, and manage your Shopify store. Coming soon, a richer visual editor will let you design your storefront and preview it before anything goes live.

You can also use Claude Duet to purchase things for your business using Link, Stripe’s digital wallet. Claude Duet confirms the item with you, and Link asks you to approve the spend. It then pays with a virtual card, so your real card number isn’t shared. It can also use Shopify’s Shop Pay to check out at online stores. Coming soon, with your permission, it will be able to sign in to sites with logins you’ve saved in 1Password.

The company has warned that because this is an early version, it might still misread a thread or misjudge what’s urgent. During the research preview, Claude Duet shares your plan’s usage limits with the rest of Claude, and it uses them differently than a typical conversation does. Its background checks count toward those limits, and larger tasks, like building a financial model or a deck, require more model turns and background work.

Availability

Claude Duet is available as a standalone app on iOS and Android, and on claude.ai. For the research preview, Claude Duet is included in Pro and Max plans (in the US) and uses the same usage limits as the rest of Claude. Interested users can join the waitlist.

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We’re committing a portion of Anthropic’s shares to the Anthropic Public Benefit Fund, a new wholly owned entity dedicated entirely to the public benefit.

It will start off with 5% of our shares. For every 50% increase in the company’s value over a set baseline, we can…

— Anthropic (@AnthropicAI) October 18, 2026

Anthropic commits 5% of its shares to the Public Benefit Fund

Subject to stockholder approval, 5% of Anthropic’s shares were committed, with an additional 2% added at the board’s discretion for every 50% increase in the company’s value above a set baseline.

The Anthropic Public Benefit Fund will have increased flexibility and scale, enabling the company to pursue its mission in new ways: for example, Anthropic might explore large donations to traditional nonprofits or direct distributions to specific populations.

Anthropic has already committed $200 million to studying and addressing the issue of instability for many workers due to AI. But given the pace of AI progress, bolder approaches may be needed. The Fund will have the versatility to pursue them.

The company revealed that it is establishing the Anthropic Public Benefit Fund as a wholly owned LLC to give adjustability between different forms of giving. None of the Anthropic equity held by the LLC will be used for lobbying or political giving, in the US or abroad.

Because of the way the Fund is structured, the more Anthropic grows, the larger the share of the company that can be dedicated expressly to the public good.

When Anthropic was founded, its co-founders pledged to donate 80% of their equity holdings, and since founding the company has also operated an equity donation match program that allows employees to pledge equity, which Anthropic matches. When combined with the above announcement, roughly 20% of Anthropic shares will be dedicated to the public good, plus an additional percentage that could be added if the company reaches specific valuation milestones.

In the coming months, the company will share more about the Anthropic Public Benefit Fund’s structure and governance, including the valuation milestones that may add to its stake.

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Introducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released.

On average, it costs around 75% less to run than Claude Haiku 4.5. pic.twitter.com/jm06cZJfkV

— Claude (@claudeai) October 7, 2026

Claude Haiku 5.5

During evaluation, this latest model performed better than Haiku 4.5 and GPT-6 Luna models in Knowledge work, computer use, multidisciplinary reasoning, agentic coding and visual reasoning.

It is the first Haiku-class model that comes with an adjustable effort setting. This means users can decide whether to optimise for cost or intelligence. Haiku 5.5 is especially good value when used for tasks with prompts up to 100,000 tokens, which make up around 90% of requests to the previous Haiku models.

According to the company, Claude Haiku 5.5 shows major improvements across almost all alignment evaluations compared with Haiku 4.5. It showed fewer instances of misaligned behaviour and a lower willingness to cooperate with misuse.

Haiku 5.5’s cybersecurity safeguards are more restrictive than Haiku 4.5’s, but somewhat less restrictive than those applied to other recent models. In cybersecurity, they permit a wider range of defensive tasks than safeguards for Sonnet 5.5, but they still block penetration testing and other techniques more likely to be used by attackers.

Haiku 5.5’s biology safeguards are the same as for Sonnet 5, Sonnet 5.5 and Opus 5. They allow research biology questions but restrict access to requests that could likely cause harm.

Availability

Claude Haiku 5.5 is available now on all platforms, including Amazon Web Services, Google Cloud, and Microsoft Azure. On the Claude Platform, developers can get started with claude-haiku-5.5.

Price per 1 million tokens

Haiku 5.5 prompts up to/over 100K

• Cache reads: $0.01/ $0.05
• Cache writes: $0.125/ $0.625
• Input tokens: $0.10/ $0.50
• Output tokens: $0.50/$2.50

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Claude now works inside Google Docs, Sheets, and Slides, and those files also open inside Claude.

In Google Workspace, Claude sits in a sidebar next to your file, reads what you have open, and edits it in place. You can approve each edit before it lands. pic.twitter.com/se9wIS7vK1

— Claude (@claudeai) October 6, 2026

Claude for Google Workspace

As officially announced, Claude for Google Workspace is now in public beta on all paid Claude plans. It adds Claude to Google Docs, Sheets, and Slides, so that you can work with Claude directly in your open files.

With the add-on, Claude opens in a sidebar next to your file, so you don’t need to switch between apps or browser tabs when you work. Claude can read the doc, sheet, or deck you have open, see which text, cells, or slides you have selected, and make changes directly in the file.

In the default “Ask before edits” mode, each change appears as an approval card with a summary, and Claude waits for your approval to make the edit. In “Accept all edits” mode, Claude works through the task and applies changes without stopping.

When you are signed in with your Claude account, the sidebar has the same models, connectors, and skills you use in Claude. On Enterprise plans, controls such as the Compliance API, customer-managed encryption keys (CMEK), and OpenTelemetry audit export apply to the add-on too.

Additionally, new Google Docs, Sheets, and Slides connectors are also released (beta) that Claude uses to create and edit Google files directly from Claude. Paste a Google file link or ask for a Google Doc, Sheet, or deck, and on supported setups it will open in a pane beside your conversation.

Availability

Claude for Google Workspace is in beta on all paid plans. Install it from the Google Workspace Marketplace, then open a file and go to Extensions> Claude> Open Claude.

Admins can deploy it to their domain or selected groups from the Google Admin console. To edit Google files from Claude, turn on the Google Docs, Sheets, and Slides connectors. On Team and Enterprise plans, an owner or primary owner needs to enable the connectors first.

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Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family.

It’s a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most work. pic.twitter.com/UvXD8mDTF1

— Claude (@claudeai) September 28, 2026

Claude Sonnet 5.5

Sonnet 5.5 improves on Sonnet 5 across domains. On several evaluations, Sonnet 5.5 at Max effort even performs comparably to Opus 5.5. Sonnet 5.5 scores 70.6% on Terminal Bench 4.0, an agentic coding evaluation, compared to Sonnet 5’s 10.3%. It scores two points below Opus 5.5 on GDPval-AA, a test of real-world work across a variety of occupations.

On several benchmarks, Sonnet 5.5 at Low or Medium effort beats Sonnet 5’s best score for about a tenth of the cost per task. It complements Opus 5.5 best when running at lower effort settings, where it costs less per task. At higher settings, it can perform comparably at a similar cost.

The model’s jump in performance is particularly noticeable in coding. Early testers appreciated how quickly Sonnet 5.5 can understand a codebase. For knowledge work, testers have found Sonnet 5.5 to be a more natural conversational partner and remarked on its knack for design, noting that it adds polish to user interfaces and can follow slide templates to create decks that require minimal editing.

For alignment assessment, on Anthropic’s automated behavioral audit, Sonnet 5.5 improves on or matches Sonnet 5 on most measures of alignment, resistance to misuse, and honesty. Sonnet 5.5’s cyber capabilities are a large improvement over Sonnet 5’s, so the company is deploying it with safeguards similar to those on Opus 5.5. Sonnet 5.5 uses the same set of biology safeguards as Sonnet 5.

Because Sonnet 5.5 is far more capable than its predecessor, it’s the first Sonnet model to launch with safety classifiers that prevent reasoning extraction. The model also expands preserved thinking, so Claude’s thinking cannot be decoupled from the account that created it.

Coming to pricing, Sonnet 5.5 is priced the same as Sonnet 5 at $2 per million input tokens, $10 per million output tokens, and $0.20 per million tokens for cache reads. But as per the company, it typically needs far fewer tokens to do the same work. In testing, Sonnet 5.5 costs up to 30% less per task than its predecessor. It also generates output 30% faster, and its efficiency is immediately noticeable.

Availability

As with Opus 5.5 and Sonnet 5, Claude Sonnet 5.5 is available with zero data retention.

Claude Sonnet 5.5 is now available on all platforms, including Amazon Web Services, Google Cloud, and Microsoft Azure. Developers can get started on the Claude Platform with claude-sonnet-5.5.

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We’re introducing Claude Fable 5.1 and Claude Mythos 5.1.

They're the world’s most advanced models for coding and knowledge work. pic.twitter.com/8P9PSrWPi3

— Claude (@claudeai) September 1, 2026

Claude Fable 5.1 & Mythos 5.1

Both are the same models, but with different levels of safeguards. Fable 5.1 is generally available, while Mythos 5.1 is available only through the company’s trusted access programs; its safeguards are specifically designed to support work in cybersecurity and the life sciences.

Claude Fable 5.1 sets a new standard for coding, knowledge work, and long-running problem-solving tasks. During evaluation, it was found that this new model is capable of much higher performance than its predecessor in Agentic scientific research, agentic coding, knowledge work, computer use, multidisciplinary reasoning, and business workflows.

The company also tested the scientific research capabilities of Fable 5.1 and Mythos 5.1 across a wide range of domains: Molecular Design (Mythos 5.1), Computational analysis and modelling (Fable 5.1), and Computational biology (Mythos 5.1). The models showed impressive performance while taking less time.

Before releasing Claude Fable 5.1 and Mythos 5.1, the company subjected the models to extensive testing for risks across many areas:

• Chemical and biological risks: The company tested the extent to which Claude Mythos 5.1 could help create chemical or biological weapons. The evaluations indicate that the model still falls short of the next risk tier defined in Anthropic’s Responsible Scaling Policy. Therefore, Mythos 5.1 is deployed with the same safeguards that were applied to Mythos 5, which restrict access to research biology capabilities.
• Cyber Risks: The company ran a suite of evaluations to assess the cyber capabilities of Mythos 5.1. But no evidence of a critical-severity jailbreak for cybersecurity safeguards was found.
• Agentic Safety: Mythos 5.1 refused malicious agentic coding and computer use requests at a comparable rate to Mythos 5, Sonnet 5, and Opus 5.
• Alignment: Mythos 5.1 was found better aligned across most metrics than its predecessor. Therefore, it is less likely than Mythos 5 to try to access resources outside of its test environment when assigned an otherwise impossible task. It is also less likely to use motivated reasoning to justify its actions. But it was found that the model can still sometimes bypass approvals and auto-mode classifiers.

Anthropic has improved its safeguards so that they allow its models to be more useful without compromising safety: Automated safeguards for enterprises, more precise safeguards for biology and cybersecurity and anti-distillation mechanisms.

In compliance with the EU AI Act, the output released by the models includes a watermark that is invisible to anyone who does not have the detective API. The Act also requires providing a way for users to tell whether a text likely contains the watermark. Thus, Anthropic is rolling out a detection API in private preview.

Cost and Availability

Claude Fable 5.1 is available on all platforms, including Amazon Web Services, Google Cloud, and Microsoft Azure. Developers can get started with claude-fable-5-1 on the Claude API.

Fable 5.1’s cache reads now cost 75% less, or $0.25 per million tokens. For typical workloads, costs are reduced by around 25% relative to Fable 5. For complex coding and highly agentic tasks, the savings could be up to around 45%.

Fable 5.1’s pricing is otherwise the same as Fable 5: $10 per million input tokens and $50 per million output tokens.

Claude Mythos 5.1 will be available through two trusted access programs: Cyber Verification Program and Life Sciences Verification Program. It is only available to a set of US organisations.

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