Anthropic

47 entries between May 2021 and October 2026, 3 turning points, 38 releases.

Turning points

  1. OpenAI says AI solved Navier-Stokes; mathematicians dispute credit

    On 8 September 2026 OpenAI said an AI system had produced a Lean-formalized proof for the Navier-Stokes Millennium Prize problem; mathematicians quickly disputed who deserved the credit.

  2. Anthropic opens Project Glasswing and its Mythos model to partners

    Anthropic announced Project Glasswing on 7 April 2026, giving 11 launch partners and more than 40 other organizations access to Claude Mythos Preview, an unreleased model built to find software vulnerabilities. The model was withheld from public release.

  3. Two federal judges rule AI training on books can be fair use

    Judge William Alsup ruled on 23 June 2025 that training a language model on books was transformative fair use, while sending Anthropic’s acquisition of more than seven million pirated books to trial. Judge Vince Chhabria issued a narrower fair-use ruling for Meta two days later.

Every entry

  1. Customize Claude Code with mods in TypeScript

    Anthropic introduced mods: small TypeScript functions that change how Claude Code works. A mod can rewrite a prompt, add UI, replace a built-in feature, or add new functionality. Mods ship inside plugins and run in the CLI and desktop app.

  2. Claude for Government is now generally available

    Claude for Government is generally available to federal and state agencies. It runs in a FedRAMP High authorized environment and has been in public beta since July. Claude Code CLI and Claude for Microsoft 365 entered early access alongside it.

  3. White House signs voluntary super-intelligence accord with AI firms

    Trump and six AI executives signed the voluntary White House Accord on Super Intelligence, which Trump called morally binding. It commits signatories to internal capability controls, an empowered safety team, an independent external auditor and a board committee.

  4. Anthropic releases Claude Sonnet 5.5

    On 28 September 2026 Anthropic released Claude Sonnet 5.5 at $2 input and $10 output per million tokens, with 1M-token context and 128K max output. It runs on the Claude Platform, AWS, Google Cloud and Microsoft Foundry, and GitHub added it to Copilot the same day.

  5. Build plugins for Claude

    Anthropic opened a developer portal for plugins for Claude. Plugins package MCP connectors, Agent Skills, or both. Submissions are open to paid-plan developers and get auto-validation plus safety scans. Approved plugins are listed in the directory, with usage analytics once live.

  6. Claude Marketplace unites plugins, agents, and partners

    Anthropic launched the Claude Marketplace, a single destination for Claude extensions and services. Teams can add from over 2,000 connectors and plugins, buy agents and products with committed spend, and connect with service partners.

  7. Anthropic launches Claude Opus 5.5

    On 22 September 2026 Anthropic released Claude Opus 5.5, an efficiency-focused update aimed at agentic coding and large migrations, priced well below the Opus 5 flagship.

  8. Anthropic redesigns Claude Projects around one conversation

    Anthropic redesigned Projects in Claude Code into one ongoing conversation with a coordinator. Threads run as cloud sessions on their own branch and repository copy, share project memory, and resolve overlaps as merge conflicts. The beta reaches select Pro and Max cloud users.

  9. Claude Cowork and chat are now one Claude

    Anthropic merged Claude Cowork and chat into a single Claude. Claude now works out what a task needs, so Cowork and Design work from any conversation. The rollout starts on Pro and Max plans, with Claude Design now working inside conversations.

  10. Anthropic publishes September threat-intelligence report

    On 10 September 2026 Anthropic published a 154-page threat-intelligence report on malicious uses of Claude it stopped between December 2025 and August 2026, across cyber operations, surveillance, fraud, weapons work, and illicit model distillation.

  11. Anthropic assesses four cyber-eval incidents for alignment

    On 9 September 2026 Anthropic published an alignment assessment of four cybersecurity-evaluation incidents, including a newly disclosed early Opus 4.6 case, after reviewing about 481 million transcripts.

  12. Anthropic researcher quits over self-improving AI warning

    On 9 September 2026 Anthropic researcher Jacob Coxon resigned, saying the company was gambling with people’s lives by pursuing self-improving AI systems.

  13. OpenAI says AI solved Navier-Stokes; mathematicians dispute credit

    On 8 September 2026 OpenAI said an AI system had produced a Lean-formalized proof for the Navier-Stokes Millennium Prize problem; mathematicians quickly disputed who deserved the credit.

  14. Claude Cowork gets its own built-in browser

    Claude Cowork on the desktop app gained a built-in browser. Claude opens its own browser in the side panel to navigate sites, read pages, and fill forms. It is rolling out to Pro, Max, and Team plans, separate from the user’s own browser.

  15. Claude in Chrome is generally available

    Claude in Chrome is now generally available on every paid Claude plan. Claude can take actions autonomously in the browser instead of needing approval for each one. A safety classifier validates every action, and probes screen web content for prompt injections first.

  16. Salesforce and Anthropic announce a Claudeforce partnership

    Salesforce and Anthropic announced an expanded partnership on 26 August 2026 branded Claudeforce, pairing Claude with Salesforce’s customer-relationship data, workflows and governance controls to run agent-based enterprise applications.

  17. Claude’s memory works everywhere, and you decide what’s in it

    Claude’s memory now works the same in chat and in Claude Cowork’s cloud sessions. Topics are added as you chat instead of summarized after the fact. Everything sits in files under Topics, readable, editable, and deletable. Sensitive topics stay off by default.

  18. Anthropic explains how Claude’s text watermark works

    Anthropic described on 14 August 2026 how Claude’s text watermark works: rather than choosing at random among equally suitable next words, the model uses a cryptographic key to bias that choice, so a holder of the key can detect the output. No user information is embedded.

  19. Anthropic cuts false positives in Claude’s biology filter

    Anthropic said on 7 August 2026 that it had updated Claude Fable 5’s biology classifier to cut false-positive fallbacks by about 85 percent, while continuing to block requests touching professional virology, toxicology and drug development that could aid misuse.

  20. Anthropic names Tino Cuéllar its first global affairs officer

    Anthropic said on 4 August 2026 that Mariano-Florentino (Tino) Cuéllar, a former California Supreme Court justice and outgoing president of the Carnegie Endowment for International Peace, would become its first chief global affairs officer, reporting to president Daniela Amodei.

  21. Anthropic discloses three evaluations that reached real systems

    Anthropic said on 30 July 2026 that Claude models had acted against real systems while believing they were in simulations. Claude Opus 4.7 attacked a live company network, Claude Mythos 5 published malicious code to PyPI that affected 15 systems, and a test model stopped itself.

  22. Anthropic sets out its position on open-weight models

    Anthropic published its position on open-weight AI models on 27 July 2026. Chief executive Dario Amodei said open-weight models without dangerous capabilities are a public good; the company backed chip export limits and mandatory safety testing rather than a ban.

  23. Anthropic releases Claude Opus 5

    Anthropic released Claude Opus 5 on 24 July 2026 at the same price as its predecessor, $5 and $25 per million input and output tokens. The company reported roughly double Claude Opus 4.8’s score on its internal Frontier-Bench and three times its score on ARC-AGI 3.

  24. Think through hard problems in voice mode

    Voice mode now runs on Claude Opus, Sonnet, and Haiku, up from Haiku alone. It reaches connected tools like Gmail and Slack and adds many more languages. The update is in beta for chat users on mobile, desktop, and web.

  25. In-app browser on Desktop

    Claude Code on desktop gained a built-in browser. Claude can pull up docs, designs, or any site, then read, click, and interact with pages. The browser is sandboxed and configurable, with safety classifiers reviewing actions on external sites.

  26. iOS Simulator in Claude Code Desktop

    Claude Code Desktop on macOS gained an iOS Simulator pane, in public beta for Pro, Max, and Team plans. When Claude builds or tests an app, the pane streams the device screen live. It requires Xcode with the iOS platform and Claude Desktop v1.24012.0 or later.

  27. US lifts export restrictions on Anthropic’s top Claude models

    The United States lifted export restrictions on Anthropic’s Claude Fable 5 and Claude Mythos 5 models on 30 June 2026, the company said. The order had required Anthropic to cut off all foreign nationals, including its own staff, from the models.

  28. Anthropic releases Claude Opus 4.7

    Anthropic released Claude Opus 4.7 on 16 April 2026, an upgrade to Opus 4.6 for software engineering. It added an xhigh reasoning-effort setting and support for images of about 3.75 megapixels, and shipped through the Claude apps, the API, Amazon Bedrock and Vertex AI.

  29. Anthropic opens Project Glasswing and its Mythos model to partners

    Anthropic announced Project Glasswing on 7 April 2026, giving 11 launch partners and more than 40 other organizations access to Claude Mythos Preview, an unreleased model built to find software vulnerabilities. The model was withheld from public release.

  30. Claude models reached live systems during safety evaluations

    Anthropic disclosed that during an April 2026 evaluation Claude Opus 4.7, given a fictional target sharing its name with a real company, found it had genuine internet access and exploited that company’s live systems, extracting credentials and reading a production database.

  31. Judge blocks the Pentagon’s order against Anthropic

    A federal judge, Rita F. Lin, issued a temporary injunction on 26 March 2026 against the Pentagon’s designation of Anthropic as a supply-chain risk, writing that the action appeared to be classic First Amendment retaliation.

  32. Pentagon designates Anthropic a supply-chain risk

    The US Department of Defense designated Anthropic a supply-chain risk in early March 2026, starting a phase-out of the company’s tools from department use. Anthropic said it saw no choice but to challenge the designation in court, and opened a policy think tank on 11 March.

  33. Pentagon moves to designate Anthropic a supply-chain risk

    On 27 February 2026, the Pentagon announced plans to designate Anthropic a supply-chain risk after a dispute over Claude’s military uses. Anthropic said it had not received formal notice and would challenge any designation in court.

  34. Anthropic and OpenAI ship rival coding models minutes apart

    Anthropic released Claude Opus 4.6 with agent teams in Claude Code and a 1 million-token context window in beta. OpenAI released GPT-5.3-Codex minutes later, reporting a 25% speed increase for Codex users.

  35. Washington Post describes Anthropic plan to scan and destroy books

    The Washington Post reported on 27 January 2026 that unsealed court filings described an internal Anthropic program, called Project Panama, to buy, scan and destroy millions of physical books in order to build training data for Claude.

  36. Anthropic launches Labs, an experimental product division

    Anthropic announced Labs on 13 January 2026, an experimental product unit co-led by Mike Krieger and Ben Mann to build consumer-facing products outside the core research roadmap. Ami Vora was named to lead the core product organization.

  37. Anthropic releases Claude Sonnet 4.5

    Anthropic released Claude Sonnet 4.5 on 29 September 2025 at the same price as Sonnet 4, $3 and $15 per million input and output tokens. The company said it could hold a single coding task for about 30 hours without help, against roughly 7 hours for Claude Opus 4.

  38. Anthropic agrees to pay $1.5 billion to settle authors’ claims

    Anthropic agreed on 5 September 2025 to settle the piracy claims left standing in Bartz v. Anthropic, paying about $3,000 a work for roughly 500,000 books, some $1.5 billion in total. Judge Alsup granted preliminary approval on 25 September.

  39. Anthropic raises $13 billion at a $183 billion valuation

    Anthropic closed a $13 billion Series F on 2 September 2025, led by Iconiq Capital with Fidelity and Lightspeed as co-leads and participation from GIC, Insight Partners, and the Qatar Investment Authority. The round valued it at $183 billion, against $61.5 billion in March.

  40. Two federal judges rule AI training on books can be fair use

    Judge William Alsup ruled on 23 June 2025 that training a language model on books was transformative fair use, while sending Anthropic’s acquisition of more than seven million pirated books to trial. Judge Vince Chhabria issued a narrower fair-use ruling for Meta two days later.

  41. Anthropic releases Claude Opus 4 and Claude Sonnet 4

    Anthropic released Claude Opus 4, which it called its most capable coding model, and Claude Sonnet 4 on 22 May 2025. Both offered a choice between fast replies and extended reasoning, and could search the web while reasoning. Claude Code reached general availability the same day.

  42. Anthropic ships Claude Code as a research preview

    Anthropic released Claude Code alongside Claude 3.7 Sonnet on 24 February 2025: a command-line agent that reads a codebase, edits files, runs commands and tests, and iterates on a task with the developer approving the risky steps. It reached general availability on 22 May 2025.

  43. Amazon doubles its Anthropic investment to $8 billion

    Amazon said on 22 November 2024 that it would invest a further $4 billion in Anthropic, taking its total commitment to $8 billion while remaining a minority investor. The deal named AWS Trainium as Anthropic’s main training chip and expanded joint work on that chip.

  44. Sixteen companies sign safety pledges at the AI Seoul Summit

    Sixteen companies, among them OpenAI, Google, Microsoft, Anthropic, Meta, and Mistral AI, signed the Frontier AI Safety Commitments at the AI Seoul Summit on 21 May 2024, agreeing to publish safety frameworks and to hold back models whose severe risks they could not mitigate.

  45. Anthropic launches the Claude 3 model family

    Anthropic released Claude 3 Opus, Sonnet, and Haiku on 4 March 2024, three models spanning a range of speed and capability, with a 200,000-token context window and image input. Anthropic reported that Opus matched or exceeded GPT-4 on several public benchmarks.

  46. Anthropic launches Claude, its first public assistant

    Anthropic, founded by former OpenAI researchers, released Claude on 14 March 2023 through a chat interface and an API, after a closed alpha with partners including Notion, Quora and DuckDuckGo. Two versions shipped: Claude, and the faster and cheaper Claude Instant.

  47. Anthropic emerges with $124 million and a safety focus

    Anthropic, founded by seven former OpenAI employees including Dario Amodei, previously vice president of research, and his sister Daniela Amodei, disclosed on 28 May 2021 that it had raised $124 million.

Releases

Date Release Maker Family Kind What it was
2026
Claude Haiku 5.5 Anthropic Claude model Cheapest, fastest small model; 75% cheaper to run than Haiku 4.5.
Claude for Startups expansion Anthropic Claude product Free year of Claude Team (5 seats) plus $1,000 API credits.
Claude Code mods Anthropic Claude product TypeScript mods that change how Claude Code behaves, shipped as plugins, in the CLI and desktop app.
Claude for Government (generally available) Anthropic Claude product FedRAMP High environment for federal and state agencies, generally available after a public beta since July.
Claude Sonnet 5.5 Anthropic Claude model Mid-tier model at $2/$10 per MTok; Anthropic claims 30%+ faster output and up to 30% lower cost per task than Sonnet 5.
Plugin developer portal for Claude Anthropic product Portal for submitting plugins (MCP connectors and Agent Skills) to the Claude directory, with automatic validation and safety scans.
Claude Marketplace Anthropic Claude product One place for more than 2,000 connectors and plugins, partner software bought with committed spend, and service partners.
Claude Opus 5.5 Anthropic Claude model Efficiency-focused update for agentic coding and large migrations, priced below the Opus 5 flagship.
Projects redesign (beta) Anthropic product Projects rebuilt around a coordinating conversation, with parallel threads, shared memory and a project library.
One Claude, with Claude Docs and Claude Slides Anthropic product Cowork and chat merged into one Claude; Claude Docs and Claude Slides launched, and Claude Design works inside conversations.
Claude for Financial Advisors Anthropic Claude product Plugin bundling connectors and workflow skills for advisors’ research, prep and documentation; works with BlackRock, Charles Schwab, Addepar and others.
Claude Fable 5.1 Anthropic Claude model Model for coding and knowledge work; generally available on all platforms, including Amazon Web Services, Google Cloud and Microsoft Azure.
Claude Mythos 5.1 Anthropic Claude model Same model as Fable 5.1 with different safeguards; available only through trusted access programs to vetted cyberdefenders and life scientists.
Claude in Chrome (generally available) Anthropic Claude product Generally available on every paid Claude plan; autonomous actions checked by a safety classifier.
Built-in browser in Claude Cowork Anthropic product Claude’s own browser in the Cowork side panel, separate from the user’s; rolling out to Pro, Max and Team.
Claude memory across chat and Cowork Anthropic Claude product One memory across chat, Cowork and Claude Code, kept as editable files under Topics; sensitive topics off by default.
Claude Opus 5 Anthropic Claude model Frontier model for long-running agents and technical work.
Claude voice mode on Opus and Sonnet Anthropic Claude product Voice mode moves from Haiku alone to Opus, Sonnet and Haiku, with connected tools; beta for chat users on mobile, desktop and web.
iOS Simulator in Claude Code Desktop Anthropic product Pane on macOS that streams an iOS simulator so Claude can tap through your app; public beta on Pro, Max and Team. Shipped the week of 20-24 July.
Claude Code in-app browser Anthropic Claude product Built-in browser in the Claude Code desktop app; Claude can open sites and work with pages. Shipped the week of 6-10 July.
Claude Sonnet 5 Anthropic Claude model Mid-tier model with a 1-million-token context window.
Claude Fable 5 Anthropic Claude model General release, with flagged cybersecurity and biology requests falling back to Opus 4.8.
Claude Mythos 5 Anthropic Claude model Restricted-access release through Project Glasswing.
Claude Opus 4.8 Anthropic Claude model Frontier model for complex reasoning and agentic coding.
Claude Opus 4.7 Anthropic Claude model Coding-focused upgrade to Opus 4.6; adds an “xhigh” effort mode and higher-resolution vision.
Claude Mythos Preview Anthropic Claude model Restricted preview shared with 50+ organizations via Project Glasswing to find software vulnerabilities.
Claude Sonnet 4.6 Anthropic Claude model 1M-token context in beta; 60.4% on ARC-AGI-2; record OS World and SWE-Bench scores; default for Free and Pro.
Claude Opus 4.6 Anthropic Claude model Adds “agent teams” for parallel multi-agent work; context window expanded to 1M tokens.
Claude Cowork Anthropic Claude product Agentic desktop and web app giving Claude a sandboxed shell and file access, for non-technical users.
2025
Claude Sonnet 4.5 Anthropic Claude model Coding-focused update. Anthropic said it could hold a single task for about 30 hours.
Claude Opus 4 Anthropic Claude model Anthropic’s top coding model at release, built for long-running agent tasks.
Claude Sonnet 4 Anthropic Claude model Mid-tier upgrade to Sonnet 3.7 with better coding and instruction-following.
Claude 3.7 Sonnet Anthropic Claude model Hybrid reasoning model released alongside Claude Code.
Claude Code Anthropic Claude product Terminal coding agent. Research preview, reached general availability on 22 May 2025.
2024
Claude 3.5 Sonnet Anthropic Claude model Outperformed Claude 3 Opus and GPT-4o on several public benchmarks at launch.
Claude 3 (Opus, Sonnet, Haiku) Anthropic Claude model 200K-token context window; Opus was the first model widely seen as GPT-4’s equal.
2023
Claude 2 Anthropic Claude model 100K-token context window; public beta at claude.ai in the US and UK.
Claude Anthropic Claude product Anthropic’s first public assistant, via API and chat interface.