AnthropicGenerally Available
Anthropic's most capable widely released model, built for the most demanding reasoning and long-horizon agentic work, with always-on adaptive thinking. It includes safety classifiers that can decline high-risk requests, with fallback to other Claude models.
Latest update Jul 4, 2026
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Generally available since June 9, 2026 on the Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud and Microsoft Foundry. Shares specs with the invitation-only Claude Mythos 5 offered under Project Glasswing.
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Announced next steps from Anthropic that mention Claude Fable 5.
Ongoing 2026
Continue the rapid Claude release cadence, having followed Fable 5, Opus 5 and Sonnet 5 with Claude Fable 5.1 and the invitation-only Claude Mythos 5.1 on September 1, 2026, still the latest public models as of September 19, 2026, and deepen enterprise-grade agentic products - including Claude Code (auto mode now default from August 14, 2026), the Claude Cowork 'AI coworker,' the new Claude for Government FedRAMP High beta, and the newly launched Claude Science research workbench and Claude for Financial Services Excel plugin - with stronger admin, analytics and spend controls, plus broader reach through the Claude Partner Network. Reuters reported September 18 that Anthropic is considering a new model to counter OpenAI's GPT-6 Astra, which Ramp put at about 13 percent of tracked enterprise AI spending versus about 8 percent for Claude Fable; Anthropic declined to comment and no name, date or model card has been announced.
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Anthropic released Claude Opus 5.5 on September 22, 2026, the first model in its Claude 5.5 family. The company says it matches Claude Fable 5.1 on most work, costs 40% less than Opus 5 on typical workloads, and is priced at $4 per million input tokens and $20 per million output tokens. It is generally available on the Claude API, Amazon Bedrock, Google Cloud and Microsoft Foundry, with Fable-class biology and cybersecurity safeguards; Sonnet 5.5 and Haiku 5.5 are due in the coming weeks.
OpenAI, Anthropic and Google all reported elevated error rates across their flagship AI products on September 3, 2026. OpenAI detected issues across ChatGPT and Codex at about 10:58 UTC affecting 15 and 4 components respectively, with mitigations applied within about 24 minutes, while Anthropic reported elevated errors on Claude Mythos 5.1, Claude Fable 5.1 and Claude Opus 5 across Claude AI, the API, Claude Code and Claude Cowork, with impact ending by 16:16 UTC. Users also reported errors and failed generations on Google's Gemini during the same window.
Anthropic released Claude Fable 5.1 and the invitation-only Claude Mythos 5.1 on September 1, 2026, describing them as its most capable models yet for coding, knowledge work and long-running research. Pricing holds at $10/$50 per million input/output tokens, but cache-read pricing drops 75% to $0.25 per million tokens. Fable 5.1 can now identify software vulnerabilities in source code and cuts Claude Code cybersecurity false positives by roughly 60%, while Mythos 5.1, restricted to vetted cybersecurity and life-sciences researchers, posts Anthropic's strongest cyber capability score yet while still landing in the low-risk tier of its Frontier Compliance Framework.
Anthropic said around August 20 it plans to change the mandatory 30-day data retention policy it applies to enterprise customers of its most capable models, Claude Fable 5 and Mythos 5, after months of pushback from corporate customers over control of proprietary data. The revised system, developed with more than 100 regulated-industry customers and set to roll out in fall 2026, keeps the 30-day retention requirement for safety monitoring but lets customers store that data on their own cloud infrastructure instead of Anthropic's. The original policy had drawn public criticism from Microsoft CEO Satya Nadella, Palantir CEO Alex Karp and White House AI adviser David Sacks.
Anthropic released Claude Opus 5 on July 24, a model it says approaches the frontier intelligence of its top-tier Claude Fable 5 at half the cost, priced at $5 per million input tokens and $25 per million output tokens, the same price as the Opus 4.8 model it replaces. The company positioned Opus 5 as the default everyday choice for agentic coding, knowledge work, computer use and complex reasoning, where it scores higher than Opus 4.8, and added a control that lets users dial the model's effort between low, medium and high. Fable 5 remains Anthropic's most capable public model, with a restricted Mythos 5 tier sitting above both.
Anthropic said late on June 30 that the U.S. Department of Commerce had removed the export controls it imposed on June 12 on Claude Fable 5 and Mythos 5, letting the company restore global access to Fable 5 from July 1 (with Mythos 5 returning to approved U.S. organizations). The June freeze followed a cybersecurity finding after Amazon researchers demonstrated a jailbreak that could prompt Fable 5 to identify software vulnerabilities. Anthropic said it would deepen government collaboration - prereleasing frontier models for federal review - and had built a new safety classifier and an industry jailbreak framework alongside Amazon, Microsoft and Google.
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Anthropic's recommended everyday default across the Claude API, Claude Code and claude.ai, released July 24, 2026 to succeed Opus 4.8. Anthropic says it approaches the frontier intelligence of Claude Fable 5 at half the cost, with gains over Opus 4.8 on agentic coding, computer use, knowledge work and complex reasoning.
The balanced and fast tiers of the Claude family. Sonnet 5 (June 30, 2026) pairs near-flagship capability with speed and a 1M-token context window; Haiku 4.5 is the fastest tier with near-frontier intelligence for high-volume, latency-sensitive workloads.
Anthropic's terminal- and IDE-based agentic coding tool that writes, edits and runs code autonomously. Launched as a research preview in February 2025, it has become one of Anthropic's fastest-growing products, with enterprise now the majority of its revenue.
Anthropic's agentic 'AI coworker' that runs longer, multi-step business tasks (memos, research, RFP reviews, decks) rather than code. Originally desktop-only, it expanded to the web and to iOS/Android on July 7, 2026, with sessions running remotely in the cloud so work continues after a device closes and state syncs across devices. A 'Record a skill' feature (July 21, 2026) turns a screen-recorded workflow into a reusable Skill.
An AI research workbench, launched June 30, 2026, that connects Claude to more than 60 scientific databases and computation tools across genomics, proteomics, structural biology and cheminformatics, coordinating specialist sub-agents and a citation/calculation-checking reviewer agent. Built on the ~$400M acqui-hire of ex-Genentech drug-discovery startup Coefficient Bio, it launched alongside an internal Anthropic drug-discovery program targeting diseases traditional biopharma considers commercially unattractive.
A FedRAMP High-authorized desktop application bringing Claude Code and Claude Cowork to US federal, state and local government agencies, deployable through standard agency MDM platforms without a separate cloud-provider contract. Adds government-specific controls: on-device conversation history, department-level administration, spend/model limits, and a hash-chained audit log.
A Chrome/Edge/Brave/Opera browser extension that lets Claude act inside the browser on a user's behalf - reading pages, clicking, filling forms, and completing multi-step workflows - rather than only discussing them.
First model in the Claude 5.5 family, released September 22, 2026 for long-running agentic coding and knowledge work. Anthropic says it performs at Claude Fable 5.1 level on most work, costs 40% less than Opus 5 on typical workloads, generates output more than 30% faster, and is priced at $4 per million input tokens and $20 per million output tokens, with cache reads at $0.20. Deployed with Fable-class biology and cybersecurity safeguards; model ID claude-opus-5-5.
Second model in the Claude 5.5 family, launched September 28, 2026 as a faster, lower-cost complement to Opus 5.5 for well-scoped coding, documents, slides and spreadsheets. Official pricing is $2 per million input tokens, $10 per million output tokens and $0.20 per million cache-read tokens, the same as Sonnet 5; Anthropic says it runs 30%+ faster and costs up to 30% less per task because it uses fewer tokens. Available as claude-sonnet-5-5 on the Claude API, Amazon Bedrock, Google Cloud and Microsoft Azure. Haiku 5.5 remains unshipped.
Anthropic's small Claude model released Oct. 7, 2026. The company called it its cheapest, fastest, and most capable small model. Priced at $0.10 input and $0.50 output per million tokens for prompts up to 100,000 tokens, and $0.50 / $2.50 above that. Available on AWS, Google Cloud, Azure, and the Claude Platform as claude-haiku-5-5.
Opt-in free service that periodically scans enrolled open-source projects with Anthropic's strongest models, including Claude Mythos, and sends model-generated vulnerability reports with a proof of concept, explanation, and suggested fix where available. Reports go out without human review. Anthropic said expert testers cleared 85 of 97 early high or critical findings for disclosure (88%), with one invalid among the rest.
Automated GitHub pull-request review for Claude Code. Team and Enterprise organizations can set Quick, Standard or Deep review per repository. Eligible Enterprise customers can claim at least $10,000 in credits through Jan. 15, 2027.
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