Anthropic

• Claude Mythos 5.1 Gen 3 Closed beta Multimodal

  Released 7d ago

  A closed source large language model that takes text and image input and returns text. It is functionally identical to Claude Fable 5.1 but ships with more permissive safeguards for vetted users, and is available by inv…

  • 🚀 Productivity
  • 🔎 Problem solving
  • 💻 Coding
  • 🤖 Agents
  • 🔍 Research
  • 🔬 Scientific research
  • 💻 Conversational coding New
• Claude Fable 5.1 Gen 3 Multimodal

  Released 7d ago

  A closed source large language model that takes text and image input and returns text. It has a 1M token context window and a 128K token maximum output. Extended thinking is adaptive and always on, with a default effort…

  • 🚀 Productivity
  • 🔎 Problem solving
  • 💻 Coding
  • 🤖 Agents
  • 🔍 Research
  • 🔬 Scientific research
  • 💻 Conversational coding New
• Claude Opus 5 Gen 3 Multimodal

  Released 1mo ago

  Anthropic's flagship Opus tier large language model, built for long running agentic work, coding, and professional knowledge tasks. It approaches the intelligence of Anthropic's top tier model at roughly half the cost,…

  • 💬 Chatting
  • 🤖 Task automation
  • 🔎 Problem solving
  • 💻 Coding
  • 🤖 Agents
  • 🔬 Scientific research New
• Claude Sonnet 5 Gen 3

  Released so far. It plans autonomously, uses tools such as browsers and terminals, and sustains long multi step coding and computer use tasks. Its agentic performance on reasoning, tool use, and coding approaches Opus 4.8 while costing less, and it supports selectable effort levels for balancing speed, cost, and capability. 💬 Chatting 🤖 Task automation 🔎 Problem solving 💻 Coding 📝 Writing assistance New Multimodal Released 2mo ago

  Anthropic's large language model, the most agentic Sonnet

• Claude Mythos 5 Gen 3 Multimodal

  Released 2mo ago

  Anthropic’s restricted-access version of the same underlying model as Claude Fable 5, designed for trusted cyberdefense, infrastructure security, and selected high-impact research use.

  • 💬 Chatting
  • 🔒 Cybersecurity
  • 🤖 Agents
  • 🔬 Scientific research
  • 🧬 Protein design
  • 🧬 Life sciences New
• Claude Fable 5 Gen 3 Multimodal

  Released 2mo ago

  Anthropic’s generally available Mythos-class Claude model for frontier reasoning, software engineering, knowledge work, vision, long-horizon tasks, and scientific research, with added safeguards for high-risk domains.

  • 🚀 Productivity
  • 🔎 Problem solving
  • 💻 Coding
  • 🤖 Agents
  • 🔍 Research
  • 🔬 Scientific research
  • 💻 Conversational coding New
• Claude Opus 4.8 Gen 3

  Released May 28, 2026. It improves on Opus 4.7 with stronger coding, more honest self-assessment, and a faster, cheaper fast mode, at the same standard pricing. New features include user-controlled effort levels and Dynamic Workflows for parallel subagents. 🚀 Productivity 💵 Financial analysis 💻 Coding 🤖 Agents 🔍 Image interpretation Multimodal Released 3mo ago

  Anthropic's new flagship model,

• Claude Opus 4.7 Gen 3 Multimodal

  Released 4mo ago

  Anthropic’s latest generally available frontier model, tuned for advanced software engineering, long-running autonomous tasks, stronger instruction following, and better high-resolution vision. It is positioned as a cle…

  • 💬 Chatting
  • 💵 Financial analysis
  • 💻 Coding
  • 🤖 Agents
  • 🔍 Image interpretation
• Claude Sonnet 4.6 Gen 3 Text

  Released 6mo ago

  Claude Anthropic’s Sonnet 4.6 model for scaled production and complex tasks across coding, agents, and professional workflows.

  • 💻 Coding
  • 🤖 Agents
  • 🖍 Coloring books
• Claude Opus 4.6 Gen 3 Multimodal

  Released 7mo ago

  Anthropic’s newest frontier model, built for complex reasoning, large-scale coding and multi-agent orchestration, with major gains in cybersecurity bug-finding and long-horizon enterprise workflows over Opus 4.5.

  • 🎥 Storyboards
  • 💻 Coding
  • 🚀 Productivity
  • 🔍 Research
• Petri 2 Gen 7 Text

  Released 7mo ago

  2.0 is Anthropic’s upgraded behavioral auditing framework that probes LLMs in realistic multi-turn scenarios, adding eval-awareness mitigations, a larger seed library and new comparisons across recent frontier models.

  • 🧘 Wellness
• Claude Opus 4.5 Gen 3 Multimodal

  Released 9mo ago

  Anthropic’s top model for hard reasoning, coding, and long-horizon agents. It improves math, vision, tool use, and safety compared with earlier Claude models.

  • 💻 Coding
  • 📊 Data analysis
  • 📝 Writing
  • 📝 Content

Papers

• A Mathematical Framework for Transformer Circuits This foundational work in mechanistic interpretability reverse-engineered small Transformers to identify "ind…

News

• A new class action lawsuit questions whether Anthropic broke the law by misleading power users Anthropic says power users are key to its business - it's prioritized them even when it means cutting off oth…
• Anthropic Said to Walk Away From $6 Billion Decart Acquisition Reports say Anthropic backed out of a planned $6 billion acquisition of chip-efficiency startup Decart after…

Repositories

• anthropic-bedrock-python Anthropic Bedrock Python API library
• anthropic-bedrock-typescript Anthropic Bedrock TypeScript API Library
• anthropic-retrieval-demo Lightweight demo using the Anthropic Python SDK to experiment with Claude's Search and Retrieval capabilities…
• anthropic-sdk-csharp Access to Anthropic's safety-first language model APIs in C#
• anthropic-sdk-go Access to Anthropic's safety-first language model APIs via Go
• anthropic-sdk-java Anthropic Java API Library
• anthropic-sdk-php Access to Anthropic's safety-first language model APIs in PHP
• anthropic-sdk-python Anthropic Python API library
• anthropic-sdk-ruby Anthropic Ruby API library
• anthropic-sdk-typescript Access to Anthropic's safety-first language model APIs in TypeScript
• anthropic-tokenizer-typescript Anthropic TypeScript Tokenizer
• anthropic-tools anthropic-tools
• attribution-graphs-frontend https://transformer-circuits.pub/2025/attribution-graphs/methods.html
• claude-agent-sdk-demos Claude Code SDK Demos
• claude-agent-sdk-python Claude Agent SDK for Python
• claude-agent-sdk-typescript Claude Agent SDK
• claude-ai-mcp Report issues related to MCP integration with Claude here.
• claude-code Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you c…

Investors

• Center for Emerging Risk Research Funding activity and profile for this investor.

• Pre-IPO Announced 30 Apr 2026
  $50B Raised $50B Round $900B Post-money 1 investors Announced
• Growth Round Announced 24 Apr 2026 · Leads: Google Ventures
  $40B Raised $40B Round $350B Post-money 1 investors Announced
• Series G Announced 12 Feb 2026 · Leads: D. E. Shaw Ventures, Dragoneer Investment Group…
  $30B Raised $30B Round $380B Post-money 37 investors Closed
• Series E+ Announced 27 Jan 2026
  $20B Round $350B Post-money Rumored
• Bridge Announced 18 Nov 2025
  $15B Raised $15B Round 2 investors Closed
• Series F Announced 02 Sep 2025 · Leads: Fidelity Management & Research Company, ICONIQ Capital…
  $13B Raised $13B Round $183B Post-money 21 investors Closed
• Debt Financing Announced 16 May 2025
  $2.50B Round Closed
• Series E Announced 03 Mar 2025 · Leads: Lightspeed Venture Partners
  $3.15B Raised $3.50B Round $61.50B Post-money 9 investors Closed
• Series D Announced 26 Mar 2024 · Leads: Menlo Ventures
  $750M Raised $750M Round $18.40B Post-money 1 investors Closed
• Bridge Announced 27 Oct 2023
  $2B Raised $2B Round 1 investors Closed
• Bridge Announced 25 Sep 2023
  $1.25B Raised $1.25B Round 1 investors Closed
• Bridge Announced 13 Aug 2023
  $100M Raised $100M Round 1 investors Closed
• Series C Announced 23 May 2023 · Leads: Spark Capital
  $375M Raised $450M Round $4.10B Pre-money 5 investors Closed
• Bridge Announced 03 Feb 2023
  $300M Raised $300M Round $5B Post-money 1 investors Closed
• Series B Announced 29 Apr 2022 · Leads: Sam Bankman-Fried
  $580M Raised $580M Round $4B Post-money 6 investors Closed
• Series A Announced 28 May 2021 · Leads: Jaan Tallinn
  $103.33M Raised $124M Round $550M Pre-money 5 investors Closed