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Anthropic · Claude models

Anthropic Claude

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Anthropic develops the Claude model family and agent products for coding and knowledge work. Its API models, ready-to-use agents and developer SDK serve different needs.

Latest briefings

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Practical guides Anthropic

Flinn AI Sues Anthropic and OpenAI Over Five Neural Network Patents

According to IT Home, Media report: Flinn Artificial Intelligence Technologies LLC filed two patent suits in Delaware federal court on Nov. 12 against Anthropic and OpenAI, alleging infringement of five patents on iterative attention-based neural network training and processing. The Anthropic complaint targets the Claude model family's attention, retrieval, memory, agentic and multimodal features. The claims are allegations; no court ruling has been reported.

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Product updates Anthropic

Anthropic Underwriters Weigh Raising IPO Price, Valuation Could Top $1.5 Trillion

According to IT Home, Media report: Financial Times says Anthropic's underwriters, led by Goldman Sachs and Morgan Stanley, are considering raising the IPO price above the $70-78 per-share range filed Tuesday, potentially lifting the target valuation past $1.5 trillion and total proceeds above $100 billion. Anthropic plans to list next week at roughly $1.4 trillion. Google, Nvidia and Microsoft are set to invest $26 billion at the IPO price.

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Product updates Anthropic

Anthropic Expands Claude MCP Apps to Full Embedded Third-Party Interfaces

According to IT Home, Anthropic said it is broadening Claude's MCP Apps support so third-party developers can embed full application interfaces inside Claude, adding App Tools and Embedded Sites capabilities. Users can open connected tools beside a conversation or full screen, and Claude can edit open pages, spreadsheet rows or files with user authorization. Adobe, Atlassian, Box, HubSpot and Notion are cited as interactive connector partners. The developer capability is in public preview; rollout is gradual on web and desktop.

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Practical guides Anthropic

New York Opens RAISE Act Registration Portal as Frontier AI Safety Law Nears

According to TechCrunch, New York opened a registration portal under its RAISE Act, requiring large frontier AI developers such as Anthropic and OpenAI to register by January 1, 2027. Covered companies must publish safety frameworks, report critical safety incidents within 72 hours and issue model transparency reports, with penalties up to $1 million per violation and $3 million for repeat violations. Governor Hochul also launched a SUNY Binghamton-based AI safety research center.

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Product updates Anthropic

Anthropic Launches Claude Meetings, Whiteboards and Sheets for Workplace Collaboration

According to TechCrunch, Anthropic announced Claude Meetings, which joins video calls as a visible participant to draft plans, map timelines and pull data from connected apps in real time, plus Claude Whiteboards and Claude Sheets for collaborative visual workspaces and spreadsheets. All three launch in beta on paid plans, with Meetings limited to Team and Enterprise on Google Meet. Claude Data is now generally available.

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Models & research Anthropic

Anthropic Releases Claude Fable 5.2 and Limits Claude Mythos 5.2 to Vetted Organizations

According to The Verge, Anthropic announced Claude Fable 5.2 and Claude Mythos 5.2, which it says improve coding, reasoning and vision and generate output faster than the 5.1 versions. Fable 5.2 is available today and can orchestrate agent teams and long-running projects; Mythos 5.2 is initially limited to vetted organizations. Anthropic claims prerelease testing included solving two open black-hole physics problems and formalizing Fermat's Last Theorem in 30 hours.

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Product updates Anthropic

Apiiro Finds Thousands of Secrets Leaked via Claude Code Settings Files on GitHub

According to Ars Technica, Security researchers at Apiiro report that Claude Code's local settings file, which can store approved shell commands verbatim, has been uploaded to public GitHub repositories over 100,000 times, with roughly 1,100 files from 63 organizations containing secrets such as API tokens, database passwords and private keys. Anthropic's Boris Cherny said the team is looking into prevention and may add secret scanning.

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Product updates Anthropic

Judge Lets Claude Max Misleading-Quota Claims Proceed Against Anthropic

According to IT Home, A US federal magistrate judge declined to dismiss key claims that Anthropic misled consumers about Claude Max usage quotas, per a media report. Plaintiffs say the $100 and $200 Max tiers deliver far less than the advertised 5x and 20x Pro limits when measured weekly, because the multiplier applies per 5-hour window. The judge found the per-cycle explanation was buried two clicks from the main sales page.

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Models & research Anthropic

METR Report Finds AI Roughly Doubling Anthropic's Research Pace

According to The Verge, A METR report on an 11-week investigation inside Anthropic says the company's models are improving about twice as fast as a year ago, with most of the acceleration attributed to AI rather than added compute. Employees reported roughly 12x productivity gains. METR also noted three trained but unreleased Anthropic models, and Anthropic redacted parts of the final report.

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Practical guides Anthropic

Anthropic Research Details Agent Memory Architecture and 'Dreaming' Consolidation for Claude

According to IT Home, Anthropic published research on agent memory, describing a four-layer design of session logs, memory notes, knowledge representations and injected context, plus a 'dreaming' mechanism where Claude reviews logs between sessions to correct errors and distill rules. On the CL-Bench database QA task, memory-enabled Claude Opus 5.5 and Sonnet 5.5 scored 0.838 and 0.833 versus 0.655 and 0.644 without memory, per the company.

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Latest models & families

As listed on 2026-10-23

Selected current official listings; specialized models and access stages are identified separately.

Anthropic models and uses
Model / familyPositioning & use
Claude Fable 5.1 ↗Advanced reasoningPositioned for demanding reasoning and long-horizon agent work.
Claude Opus 5.5 ↗General-purposeThe current model overview recommends starting here for most workloads.
Claude Sonnet 5.5 ↗ModelA current Claude family option for coding and everyday work.
Claude Haiku 5.5 ↗Small modelThe small-model option in the current Claude lineup.

Agent tools & products

Where to start

Use Claude Code for repository work, Duet for eligible proactive workflows, and the SDK when you need your own application. A model name alone does not include these product capabilities.

YYSI coverage

Official sources

Checked 2026-10-23 · Original introductions based on vendor documentation, not hands-on reviews.

Availability and product terms can change. Current means checked on the date above, not a live feed or a claim to list every model.