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    Anthropic

    Also known as Anthropic PBC

    Anthropic is a US artificial intelligence company, founded in 2021 by former OpenAI executives, that develops the Claude family of AI models.[1] It is a public benefit corporation.[2] In May 2026 it raised $65 billion at a $965 billion valuation, and in June 2026 it confidentially filed for an IPO.[3][4]

    Editor reviewedUpdated Artificial intelligenceBig Tech
    Key facts

    Anthropic is an artificial intelligence company that develops the Claude family of AI models.[5] It was founded in 2021 by siblings Dario Amodei and Daniela Amodei, both former vice presidents at OpenAI.[1] As of October 2026 it remains privately held; its last priced round, in May 2026, valued it at $965 billion.[3][4]

    History and leadership

    Anthropic is led by Dario Amodei as chief executive and Daniela Amodei as president.[6] In May 2021 it described itself as an AI safety and research company when it announced $124 million in funding led by Skype co-founder Jaan Tallinn.[7] The company is headquartered in San Francisco.[8]

    Structure and governance

    Anthropic is a public benefit corporation. Its stated purpose is “the responsible development and maintenance of advanced AI for the long-term benefit of humanity.”[2] It also has a Long-Term Benefit Trust, whose trustees help elect the board of directors.[9] The company says it aims to build “reliable, interpretable, and steerable AI systems.”[10]

    Funding, revenue and IPO filing

    On February 12, 2026 Anthropic announced a $30 billion Series G round at a $380 billion post-money valuation, led by GIC and Coatue.[11] At the time it said its run-rate revenue was $14 billion.[12]

    On May 28, 2026 it announced a $65 billion Series H round at a $965 billion post-money valuation, led by Altimeter Capital, Dragoneer, Greenoaks and Sequoia Capital.[3] It said its run-rate revenue had crossed $47 billion that month.[13] Anthropic counts sales made through cloud partners in this figure, which OpenAI does not, so the two companies’ numbers are not directly comparable.[14]

    To run its models, Anthropic has signed compute agreements with Amazon for up to five gigawatts of new capacity, with Google and Broadcom for five gigawatts of TPU (tensor processing unit) capacity, and with SpaceX for GPU capacity.[15]

    On June 1, 2026 Anthropic confidentially submitted a draft Form S-1 registration statement to the US Securities and Exchange Commission for a proposed initial public offering. It said the number of shares and the price had not been set.[4]

    Claude models

    Anthropic released several models in September and October 2026. On September 1 it released Claude Fable 5.1, along with Claude Mythos 5.1 for participants in its Project Glasswing program.[16] Claude Opus 5.5 followed on September 22, aimed at long-running agentic coding and knowledge work, with a context window of 1 million tokens.[5] Claude Sonnet 5.5 arrived on September 28, and Claude Haiku 5.5, tuned for high-volume and latency-sensitive work, on October 7.[17]

    Developers can use these models through Anthropic’s own API and through Amazon Bedrock, Google Cloud and Microsoft Foundry.[18]

    In April 2026 Anthropic announced Project Glasswing, which gives defenders of critical software access to Claude Mythos Preview, a model it described as general-purpose and unreleased.[19] Shortly after it released Claude Fable 5 in June 2026, Anthropic said a US government export control directive required it to suspend all access to Fable 5 and Mythos 5 by foreign nationals, and that it had to disable both models for all customers to comply.[20] The US AI chip export controls page covers the wider rules.

    Anthropic also introduced the Model Context Protocol (MCP) in November 2024, an open standard for connecting AI assistants to the systems where data lives.[21] Its Responsible Scaling Policy, one of the frontier-safety-frameworks published by AI developers, was first introduced in September 2023 and reached version 3.4 in July 2026.[22] In January 2026 it published a new constitution for Claude that explains the reasoning behind desired behaviours rather than listing rules.[23]

    For chips, Anthropic agreed in July 2026 to deploy up to 2 gigawatts of AMD Instinct MI450 Series GPUs, and AMD committed to invest up to $5 billion in the company.[24][25]

    Dispute with the Pentagon

    In 2026 the US Defense Department designated Anthropic a supply chain risk, and Anthropic challenged the designation in court.[26][27] In August 2026, US District Judge Rita Lin in California ruled that the designation was unlawful retaliation under the First Amendment.[26] On September 25, 2026 the US Court of Appeals for the District of Columbia Circuit ruled 2-1, in a separate case about a different rule, that the Pentagon could keep the label. That ruling lets the Pentagon continue removing Claude models from its systems.[27]

    Questions readers ask

    Who founded Anthropic?

    Anthropic was founded in 2021 by siblings Dario Amodei and Daniela Amodei, both former vice presidents at OpenAI. Dario Amodei is chief executive and Daniela Amodei is president.[1][6]

    Is Anthropic a public company?

    No. On June 1, 2026 it confidentially submitted a draft S-1 registration statement to the SEC for a proposed IPO, but the number of shares and the price had not been set.[4]

    How much is Anthropic worth?

    Its Series H round in May 2026 valued it at $965 billion post-money.[3]

    Can Anthropic's revenue be compared directly with OpenAI's?

    Not directly. Anthropic counts sales made through its cloud partners in its annualized revenue; OpenAI does not.[14]

    Sources

    Each numbered claim is a statement we checked against the sources listed with it. Status shows how well established it is.

    1. [1]

      Anthropic was founded in 2021 by former OpenAI vice presidents Dario Amodei and Daniela Amodei, who are siblings. confirmedas of 2026-10-10

    2. [2]

      Anthropic is a public benefit corporation whose stated purpose is the responsible development and maintenance of advanced AI for the long-term benefit of humanity. confirmedas of 2026-10-10

      • Company · Anthropic (retrieved 2026-10-10)
    3. [3]

      On May 28, 2026 Anthropic announced a $65 billion Series H round at a $965 billion post-money valuation, led by Altimeter Capital, Dragoneer, Greenoaks and Sequoia Capital. confirmedas of 2026-05-28

    4. [4]

      On June 1, 2026 Anthropic, PBC confidentially submitted a draft Form S-1 registration statement to the US SEC for a proposed IPO; the number of shares and price had not been set. confirmedas of 2026-06-01

    5. [5]

      On September 22, 2026 Anthropic released Claude Opus 5.5, a model for long-running agentic coding and knowledge work with a 1 million token context window. confirmedas of 2026-09-22

    6. [6]

      Anthropic is led by Dario Amodei as chief executive and Daniela Amodei as president. confirmedas of 2026-10-10

    7. [7]

      In May 2021 Anthropic, describing itself as an AI safety and research company, announced it had raised $124 million in a round led by Skype co-founder Jaan Tallinn. confirmedas of 2021-05-28

    8. [8]

      Anthropic is headquartered in San Francisco, California. reportedas of 2026-10-10

    9. [9]

      Anthropic has a Long-Term Benefit Trust whose trustees help elect its board of directors. confirmedas of 2026-10-10

      • Company · Anthropic · Long-Term Benefit Trust section (retrieved 2026-10-10)
    10. [10]

      Anthropic says it builds reliable, interpretable and steerable AI systems. confirmedas of 2026-10-10

      • Company · Anthropic (retrieved 2026-10-10)
    11. [11]

      On February 12, 2026 Anthropic announced a $30 billion Series G round at a $380 billion post-money valuation, led by GIC and Coatue. confirmedas of 2026-02-12

    12. [12]

      In February 2026 Anthropic said its run-rate revenue was $14 billion, less than three years after it first earned revenue. confirmedas of 2026-02-12

    13. [13]

      Anthropic said in May 2026 that its run-rate revenue had crossed $47 billion. confirmedas of 2026-05-28

    14. [14]

      OpenAI and Anthropic calculate annualized revenue differently; Anthropic counts sales made through its cloud partners and OpenAI does not. reportedas of 2026-10-08

    15. [15]

      By May 2026 Anthropic had signed compute agreements with Amazon for up to five gigawatts of new capacity, with Google and Broadcom for five gigawatts of TPU capacity, and with SpaceX for GPU capacity. confirmedas of 2026-05-28

    16. [16]

      On September 1, 2026 Anthropic released Claude Fable 5.1 and, for Project Glasswing participants, Claude Mythos 5.1, both priced at $10 per million input tokens and $50 per million output tokens. confirmedas of 2026-09-01

    17. [17]

      Anthropic released Claude Sonnet 5.5 on September 28, 2026 and Claude Haiku 5.5, tuned for high-volume and latency-sensitive work, on October 7, 2026. confirmedas of 2026-10-07

    18. [18]

      Anthropic's current Claude models are available through its own API and through Amazon Bedrock, Google Cloud and Microsoft Foundry. confirmedas of 2026-10-07

    19. [19]

      On 7 April 2026 Anthropic announced Project Glasswing, giving defenders of critical software access to Claude Mythos Preview, which it described as a general-purpose, unreleased frontier model. confirmedas of 2026-04-07

    20. [20]

      On 12 June 2026, three days after Claude Fable 5's release, Anthropic said a US government export control directive required it to suspend all access to Fable 5 and Mythos 5 by foreign nationals, and that it had to disable both models for all customers to ensure compliance. confirmedas of 2026-06-12

    21. [21]

      Anthropic introduced the Model Context Protocol (MCP) on 25 November 2024 as an open standard for connecting AI assistants to the systems where data lives, such as content repositories, business tools and development environments. confirmedas of 2024-11-25

    22. [22]

      Anthropic's Responsible Scaling Policy was first introduced in September 2023; version 3.0 took effect on 24 February 2026 and version 3.4 on 8 July 2026. confirmedas of 2026-10-10

    23. [23]

      On 22 January 2026 Anthropic published a new constitution for its Claude models that explains the reasoning behind desired behaviours rather than listing rules, and released it under a CC0 public-domain dedication. confirmedas of 2026-01-22

    24. [24]

      In July 2026 Anthropic agreed to deploy up to 2 gigawatts of AMD Instinct MI450 Series GPUs in Helios rack-scale systems, with the first gigawatt beginning in the first half of 2027. confirmedas of 2026-07-22

    25. [25]

      AMD committed to a strategic equity investment of up to $5 billion in Anthropic. confirmedas of 2026-07-22

    26. [26]

      In August 2026 US District Judge Rita Lin in California ruled that the Defense Department's designation of Anthropic as a supply chain risk was unlawful retaliation under the First Amendment. confirmedas of 2026-08-28

    27. [27]

      On September 25, 2026 the US Court of Appeals for the District of Columbia Circuit ruled 2-1 that the Pentagon could label Anthropic a supply chain risk under a different rule, allowing it to remove Claude models from its systems. reportedas of 2026-09-25

    28. [28]

      Google said Gemini 4 Argon scored significantly higher than OpenAI's GPT-6 Astra and Anthropic's Fable and Opus models across several AI benchmarks. confirmedas of 2026-09-30

    Revision history (2)
    1. Page created.
    2. Refresh: added the AMD partnership, the Fable 5 export-control suspension, MCP, Claude Mythos and safety-policy links to the research-field pages.

    Created Oct 10, 2026. Last reviewed by an editor on Oct 10, 2026. Next scheduled review: Jan 10, 2027.

    Cite this page

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    OpenAI Founders previously worke…Google DeepMind CompetitorAMD GPU supplier and investorModel Context Proto… Created (open standard)Claude Mythos Developer of
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