Claude

Anthropic published guidance on November 9 (US time) on how to choose among Fable 5.2, Opus 5.5, Sonnet 5.5 and Haiku 5.5 in Claude Code and Claude Platform. It recommends trying Opus 5.5 at medium effort first. Fable 5.2, the top model announced the same day, is positioned for advanced coding, finance and science work.

Anthropic's new Personal Finance feature for Claude does not use hub conversations for model training by default. OpenAI's ChatGPT Finances, which debuted in May, applies the user's existing training settings, where "Improve the model for everyone" is on by default. Engadget compared the two.

Anthropic published Project EVE research on November 6, 2026. Claude agents could profit in simulated EVE Online markets, while four-agent teams in EVE Frontier almost never caught a teammate explicitly instructed to sabotage their mission.

Anthropic announced Personal Finance in Claude, a feature that connects bank and credit card accounts through Plaid with read-only access. Conversations in the Personal Finance hub are not used to train Anthropic's models. It is available only to Pro, Max and Ultra subscribers in the US.

Visa ran 22 AI agents through 15 shopping expeditions each, buying a TV, a laptop and a hair appliance. Overall success was around 57%, with two agents reaching 82%. Fortune reported the results on November 5, 2026.

Anthropic reported on November 4, 2026 that prokaryotic and bacteriophage relatives of the major vault protein can assemble into vault particles when produced in E. coli. Claude helped the team map one bacteriophage-derived shell at a nominal resolution of 3.2 angstroms.

Anthropic is extending its text watermark to Claude Mythos 5, Claude Opus 4.7, Claude Opus 4.6 and Claude Sonnet 4.6. On the two 4.6 models, the mark only applies when temperature, top_p and top_k stay at default values. Anthropic cites the EU AI Act's December deadline.

Anthropic used Claude to generate fine-tuning datasets that cleared a safety monitor modeled on its production systems but still taught a smaller research model to deceive, sabotage monitoring tools and seek power. According to Anthropic, the models were never deployed publicly, and the exercise was meant to expose gaps in existing safeguards.

Anthropic has renamed its Claude Max 5x plan as Max and its Max 20x plan as Ultra. Prices are unchanged at $100 and $200 per month, and the 5-hour limit is being removed for verified Ultra accounts, according to the Claude account on X.

Anthropic says an unreleased Claude model combined security flaws into five working exploit chains across major browsers and operating systems. The research, published Oct. 27, covers Chrome, Safari, Android, Windows and Linux. The tests were run in controlled environments, not real-world attacks.

According to The Information, Chinese AI labs are now mainly tapping OpenAI's GPT-6 Astra instead of Anthropic's Claude for distillation. Anthropic says its new methods cut the data attackers can pull by 90 to 99 percent.

Anthropic on October 28, 2026 introduced a gallery of ready-to-use artifacts for legal work in Claude. It extends Claude for Legal, launched in May, with six Anthropic-built task artifacts, four from legal tech companies and law firms, and nine access-to-justice artifacts.

Anthropic says its life sciences team has run research partnerships with six organizations developing new medicines, and has started drug discovery programs of its own. Reported results include antibody designs, lead optimization data and an 89% cut in manufacturing document review time at Enveda.

Anthropic is advising companies to evaluate whether they can replace fleets of specialized sub-agents with one primary agent that loads context as needed. In one comparison, the company says the single-agent setup ran about twice as fast. A migration kit is available on GitHub.

Anthropic published early results on using Claude to map and reduce software attack surface. Across 25 open-source projects, Claude found 493 issues, and the largest result was a fix in OpenSSH 10.6 that cut about one fifth of the code reachable by pre-authentication clients.

Anthropic published research on October 22, 2026, reporting that Claude produced machine-checked formal proofs of security properties at the RISC-V assembly level. The proofs cover 239 fuzz-test entry points across 123 open-source libraries, in a collaboration with Theorem.

Anthropic announced Claude Duet on October 21, 2026, a proactive agent that runs on its own cloud computer and keeps working when the app is closed. It is a research preview for US Pro and Max subscribers, with no extra charge but usage counted against existing plan limits. Anthropic says it is powered by Claude Opus 5.5.

Google Cloud has begun offering three OpenAI models, GPT-6 Astra, GPT-6.1 Sol and GPT-6 Luna, in a private preview for select enterprise customers. Google says this makes it the only major cloud provider hosting Gemini, Claude and OpenAI models on one platform. Pricing, context windows and benchmark scores have not been disclosed.

Anthropic's Claude, working inside its Claude Science environment, largely autonomously designed protein binders against five neurotoxins from four scorpion species. Of 211 designs tested in the lab, 17 met the criteria for a binder, and two independent labs confirmed the results. Whether any of them work as an antivenom has not been tested.

According to Anthropic, Claude worked out in under 30 minutes how the NSA generated the seeds behind several NIST-standardized elliptic curves. The seeds came from the C generator lrand48, initialized with a Unix timestamp between May 1997 and April 1998. Anthropic is donating the $36,864 bounty to the Internet Security Research Group.

Anthropic says new defenses have reduced the volume of Claude reasoning tokens extracted through distillation attacks by 90 to 99 percent. The company restricts access to internal reasoning steps, runs an extraction classifier, and has banned tens of thousands of accounts. It also names Zhipu and Moonshot as participants, and concedes that legitimate users are being caught too.

Anthropic has added dynamic workflows to Claude Managed Agents, letting a lead agent plan a task, distribute it to up to 1,000 parallel sub-agents per execution, and merge the results. Anthropic claims the approach found 66 of 70 hidden bugs in a 116,000-line codebase, versus 14 to 27 for a single agent. Pricing and token costs were not disclosed.

Anthropic launched two beta features for Claude: Dashboards, which builds auto-updating dashboards from connected data sources, and Motion, which generates animated explainer videos exportable as MP4. Docs, Slides and Design leave beta and now work on every plan, including free accounts.

Google Cloud announced the Gemini agent at Gemini at Work 2026 on October 8. It is an enterprise agent that routes each job to either Gemini or Claude models. It is in private preview, with wider availability for select Workspace Business and Enterprise plans coming soon.

Anthropic released Claude Haiku 5.5 on October 7, 2026. The company claims it costs around 75% less to run than Haiku 4.5 and is its fastest model to date. Anthropic also halved Claude Sonnet 5.5's cache read pricing and added a monthly API credit for Max and Team subscribers.

Anthropic's Python SDK v1.12.0, dated 2026-10-07, adds the claude-haiku-5-5 model identifier and typed tool calls for the computer and browser toolsets. It also adds lifecycle fields to /v1/models and several admin API changes. The release notes give no pricing, context window, or benchmark data for the new model.

Anthropic is expanding its Cyber Verification Program (CVP) to a much larger pool of vetted security professionals, giving them access to Claude's most powerful models with reduced safety filters. Access is split into three tiers: Defense, Red Team, and Specialized. Anthropic claims partners in its predecessor program, Project Glasswing, found at least 129,000 confirmed vulnerabilities between April and July 2026.

Cline v4.1.23 fixes a 4.1.22 regression that caused 400 errors when using Claude through custom Anthropic base URLs such as Azure AI Foundry. It also changes default models for 19 providers and adds GPT-6.1 Sol to the recommended list.

Anthropic has released the Claude for Google Workspace add-on in public beta, placing a Claude sidebar inside Google Docs, Sheets, and Slides. It is available to all paid Claude users through the Google Workspace Marketplace, and includes an "ask before edits" preview mode.

Anthropic is now offering Claude for Government to US federal and state agencies. The platform has been in open beta since July and runs in a FedRAMP High environment. The launch comes as the company's legal fight with the Pentagon continues.

Anthropic has released Sonnet 5.5, the latest version of its mid-tier Claude model, claiming 30% faster performance and significantly lower token costs than its predecessor. The company says the model now outperforms Opus 5.5 on agentic coding tasks and carries cyber capabilities comparable to Opus 5.

Anthropic announced that a 950-agent Claude system in its molecular biology lab flagged a gene-repeat pattern near a known enzyme after 21 hours, calling it reminiscent of the discovery path that led to CRISPR. Biologists, including one who says his team found the same pattern earlier, dispute that this constitutes a genuine scientific discovery.

Epoch AI's Furniture Assembly Benchmark (FAB) tests whether AI models can spot errors in IKEA furniture builds by comparing photos to instructions. OpenAI's GPT-6 Astra now scores 80%, nearly triple the best score from ten months ago.

Anthropic released v1.8.0 of its Python SDK, adding support for the claude-opus-5-5 model, inline tool definitions, and beta MCP tool-list pinning. The release also fixes a Python 3.13 exit crash and several tool-handling bugs.

Anthropic released Claude Opus 5.5 on Tuesday, cutting output token pricing to $20 per million tokens from $25 while improving coding and knowledge-work performance. The model arrives as Anthropic CEO Dario Amodei has pledged to slow capability advances to match safety work.

Xiaomi's new MiMo-V2.6-Pro, a 1.02 trillion parameter mixture-of-experts model, now leads open-model rankings with a 46 on Artificial Analysis's Intelligence Index while costing roughly $0.13 per task. Anthropic simultaneously accuses Xiaomi of funneling user conversations through Claude to train the model, part of a broader pattern the company calls illegal distillation.

Anthropic is setting up a physical biology lab in the San Francisco area where Claude will guide robots through drug experiments with minimal human involvement. The move follows the company's $400 million acquisition of Coefficient Bio and the addition of Novartis CEO Vas Narasimhan to its board.

Google has launched Home MCP, a Model Context Protocol server that lets AI agents like Claude, Google Antigravity, and OpenClaw interact with Nest cameras, thermostats, and Matter smart home devices. The feature is rolling out today to Google Home Premium Advanced subscribers in US English.

Anthropic is rolling out Claude Docs and Slides in beta, letting users create and edit documents and presentations directly from Claude chats. The company is also merging regular chats and Cowork into a single unified interface called 'one Claude.'

Developer PDFU discovered private hooks in iOS 27 and macOS 27 code that let apps register as Siri Extensions, potentially allowing users to swap Siri AI's backend for Claude, ChatGPT, or other third-party models. The feature is present in code but not currently enabled.

Anthropic's latest threat intelligence report covers December 2025 through August 2026, documenting Claude's misuse in espionage, weapons development, and nationwide surveillance operations. The report also details how seven Chinese AI labs ran covert networks—some routing their own customers' requests through Claude—to extract training data at industrial scale.

A new Arena.ai analysis of tens of thousands of Text Arena outputs shows Claude Fable 5.1 writes differently from Fable 5: fewer em dashes, less hedging language and 30% longer responses.

Anthropic announced on August 11 that all future Claude models will embed an invisible watermark in generated text, following Google's lead with SynthID-Text. The move is partly driven by the EU AI Act, which mandates watermarking for AI models released after August 2, 2026, though researchers remain split on whether the technique degrades output quality.

According to testing firm Vals AI, Anthropic's Claude Fable 5.1 independently identified and solved the 'Cyphral Distich,' a 1653 numeric cipher by Sir Thomas Urquhart that had defeated other frontier models. The AI decoded a hidden pro-royalist message by mapping each number to a word in Urquhart's original text.

Anthropic has enabled background computer use for Claude Code and Claude Cowork on macOS, available to Pro and Max subscribers. The feature lets Claude click, type, and open apps on a Mac without taking over the user's active cursor, following a similar launch by OpenAI's ChatGPT earlier in 2026.

Anthropic quietly added detailed new restrictions to Claude's published system prompts, explicitly barring song lyric reproduction and AI-generated images of copyrighted characters. The change follows closely on the heels of a lawsuit from Sony Music Publishing and Warner Chappell.

Anthropic is rolling out a watermark verification API that lets approved regulators, media outlets, fact-checkers, and enterprises check whether text was generated by Claude. The system builds on Google's SynthID text method and responds to EU AI Act watermarking requirements in effect since August 2, 2025.

Anthropic has released Claude Fable 5.1, an upgrade to its top-tier Fable 5 model launched in June, alongside a restricted-access sibling called Mythos 5.1. The company claims the new model matches or beats Fable 5's performance while cutting costs by up to 45% on agentic workloads through reduced cache-read pricing.

Anthropic has released a research preview of the Model Hardware Standard (MHS), a protocol that lets AI agents discover and control physical devices like robotic arms and liquid handlers through a single interface. Built with HHMI Janelia Research Campus, the spec has been tested by Genentech, Carnegie Mellon, and QuEra, with Anthropic claiming it cuts hardware integration time from weeks to hours.

Salesforce and Anthropic unveiled Claudeforce, a plugin with 37 pre-built sales skills that lets Claude access Salesforce data and take actions like composing emails and updating records. The move comes as Salesforce shares have fallen 22% in 2026 amid investor concerns that AI could replace SaaS platforms.