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Statement on US government directive to suspend access to Fable 5 and Mythos 5
The US government has issued an export control directive suspending all access to Fable 5 and Mythos 5 by foreign nationals inside or outside the US.
Anthropic
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
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Visit anthropic.com → On Hacker News May 2023 – Nov 2026
AI & Machine Learning 135Tech Industry & Business 58Software Engineering 30Security & Privacy 20Society, Policy & Culture 12Science & Space 11
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Statement from Dario Amodei on our discussions with the Department of War
A statement from Anthropic CEO Dario Amodei on our discussions with the Department of War and national security uses of AI.
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Claude Fable 5
Today we’re launching Claude Fable 5: a Mythos-class model that we’ve made safe for general use.
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Claude Opus 4.6
We're upgrading our smartest model. Across agentic coding, computer use, tool use, search, and finance, Opus 4.6 is an industry-leading model.
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Claude 3.7 Sonnet and Claude Code
Today, we’re announcing Claude 3.7 Sonnet, our most intelligent model to date and the first hybrid reasoning model generally available on the market.
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Claude 4
Discover Claude 4's breakthrough AI capabilities. Experience more reliable, interpretable assistance for complex tasks across work and learning.
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Claude Opus 4.7
Claude Opus 4.7 is now generally available, with notable gains over Opus 4.6 in advanced software engineering and the most difficult tasks.
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Claude Opus 5.5
Claude Opus 5.5 leads in agentic coding and knowledge work, and costs 40% less to run than Opus 5 on typical workloads.
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Claude Opus 5
Opus 5 is a step change improvement for the Opus tier powering long-running agents while delivering improvements in coding and professional work.
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Claude Opus 4.8
Claude Opus 4.8 brings stronger performance across coding, agentic tasks, and professional work, and the consistency to handle long-running work.
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Claude Sonnet 4.5
Claude Sonnet 4.5 is the best coding model in the world, strongest model for building complex agents, and best model at using computers.
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Project Glasswing: Securing critical software for the AI era
A new initiative to secure the world’s most critical software and give defenders a durable advantage in the coming AI-driven era of cybersecurity.
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Computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku
A refreshed, more powerful Claude 3.5 Sonnet, Claude 3.5 Haiku, and a new experimental AI capability: computer use.
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Claude Fable 5.1 and Claude Mythos 5.1
Our most advanced models for coding and knowledge work. Their research capabilities also offer an early glimpse of how AI models will contribute to scientific progress.
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Claude Sonnet 4.6
Claude Sonnet 4.6 is a full upgrade of the model’s skills across coding, computer use, long-reasoning, agent planning, knowledge work, and design.
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Claude Sonnet 4 now supports 1M tokens of context
Claude Sonnet 4 now supports up to 1 million tokens of context—a 5x increase that lets you process entire codebases, synthesize extensive document sets, and build agents that maintain coherence across hundreds of tool calls.
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Claude Sonnet 5
Our most agentic Sonnet yet, with top-tier intelligence for coding and everyday professional work.
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Claude Design
Claude Design lets you collaborate with Claude to create polished visual work like designs, prototypes, slides, and one-pagers.
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Claude can now search the web
Claude can now search the internet to provide up-to-date, cited responses on all plans worldwide. Get real-time insights for research, market analysis, and more.
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A small number of samples can poison LLMs of any size
Anthropic research on data poisoning attacks shows a few hundred malicious documents can "backdoor" large language models of any size.
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Our position on open-weights models
Anthropic CEO Dario Amodei on open-weights models
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Statement on the comments from Secretary of War Pete Hegseth
Anthropic's response to the Secretary of War and advice for customers
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Claude Opus 4.5
Claude Opus 4.5 is our new flagship model, with state-of-the-art coding and agentic performance at lower pricing.
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Tracing the thoughts of a large language model
Anthropic's latest interpretability research: a new microscope to understand Claude's internal mechanisms
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Claude reveals ECDSA curve origins
The decades-old mystery of the origins of one of the most popular cryptographic standards has been explained.
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Claude Haiku 5.5
Claude Haiku 5.5 is our fastest, most capable small model. Built for high-volume work like summarization, subagents, and browser use.
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Claude 3 model family
The Claude 3 model family—Haiku, Sonnet, and Opus—sets new industry benchmarks across a wide range of cognitive tasks.
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An update on recent Claude Code quality reports
We traced recent reports of Claude Code quality issues to three separate changes. Here's what happened, what we fixed, and what we're changing.
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100K Context Windows
Claude's context window expands from 9K to 100K tokens, roughly 75,000 words, letting it process hundreds of pages in under a minute.
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Redesigning source control at Anthropic
As our merges per day grew more than tenfold, source control became our biggest development bottleneck. Here, we share how we migrated to an in-house version control system in five months.