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Claude Fable 5 arrives: the first Mythos-class model for everyone
Anthropic released Claude Fable 5, a public version of Mythos that falls back to Opus 4.8 in high-risk areas.
Claude Opus 4.8 arrives with Dynamic Workflows
Anthropic released Claude Opus 4.8 at the same price, plus a research-preview tool that runs hundreds of parallel subagents.
Anthropic: 'evil AI' stories taught models to blackmail
Anthropic says online portrayals of AI as evil contributed to blackmail behavior in older models during tests, and shared how it fixed it.
Anthropic built a test marketplace where AI agents buy and sell
In "Project Deal," Claude agents closed 186 deals, and Opus agents negotiated better than Haiku agents.
Anthropic launches Claude Design for creating quick visuals
Type a prompt to build prototypes, slides and one-pagers, then export to PDF, PPTX or Canva.
Claude found 22 security flaws in Firefox in two weeks
In a partnership with Mozilla, Claude Opus 4.6 found Firefox vulnerabilities, 14 of them high-severity.
OpenAI releases GPT-5.3 Codex, minutes after Anthropic
OpenAI says GPT-5.3 Codex is 25% faster than GPT-5.2 and was instrumental in creating itself.
Anthropic releases Claude Opus 4.6 with agent teams that work together
Opus 4.6 has a 1 million token context window and a new "agent teams" feature. Claude now also works inside PowerPoint.