Anthropic

25 entries between May 2021 and August 2026, 2 turning points, 22 releases.

Turning points

  1. 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.

  2. 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. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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.

  15. 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.

  16. 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, and destroying the pirated copies. Judge Alsup granted preliminary approval on 25 September.

  17. 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.

  18. 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.

  19. 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.

  20. 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.

  21. 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.

  22. 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.

  23. 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.

  24. 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.

  25. 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 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 Opus 5 Anthropic Claude model Frontier model for long-running agents and technical work.
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.