Claude Code Coding Agents Claude Opus 5.5

Claude

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Anthropic's AI assistant product, available through web and desktop experiences, for conversation, writing, analysis, coding, and agentic work.

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releaseSECONDARY2026-09-22

Anthropic makes Claude Opus 5.5 the default across Claude Code, Claude, and Cowork for paid plans

Anthropic says Claude Opus 5.5 is now the default across Claude Code, Claude, and Cowork for paid plans. The company says it is faster and cheaper than Opus 5, with rate limits extending 25% further.