Anthropic confirmed Claude Opus 5.5 is available. It is the first model in the new Claude 5.5 family, performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.
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Anthropic announced a partnership with Accenture on independent embedded evaluation of frontier AI, part of its commitment to embed evaluators at Anthropic. Both expect to invest at least $1 billion each over five years to build capacity; details at anthropic.com/news/accenture-embedded-evaluation.
Anthropic staff announced that Claude Code 2.1.277 adds AGENTS.md support: if a project folder has no CLAUDE.md, Claude reads AGENTS.md for project instructions, toggleable under Project instructions in /config. The official changelog lists about 87 CLI changes, including fixing silent hangs in claude -p and Agent SDK sessions after internal errors. The feature is not yet available on Bedrock, Vertex, or Foundry.
Anthropic is merging Claude Cowork and chat into one Claude experience: ask a quick question or hand off a report, keep work running after you close the laptop, and Claude asks when unclear while you keep final say. Existing Cowork chats, projects, artifacts, connectors, and skills carry over; Claude Design, Slides, and Docs are in beta on paid plans, rolling out to Pro and Max over the next few weeks.
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