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Claude Opus 5.5: Anthropic's Latest Model for Agentic Coding

This story is from 2026-09-29. It is preserved in the archive; the latest stories are on the live feed.

Key Takeaways Claude Opus 5.5 launched September 22, 2026 Anthropic's first model in the new Claude 5.5 family 40% cheaper to run than Opus 5 Optimized for agentic coding and knowledge work Available on Amazon Bedrock, AWS Claude Platform, Microsoft Foundry Performs at Claude Fable 5.1 level on mos…

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  1. 2026-09-29 09:29 · DEV Community — AI
    Claude Opus 5.5: Anthropic's Latest Model for Agentic Coding

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  2. GitHub Adds Claude Sonnet 5.5 to Copilot, Cutting Coding Costs by 30% — AlphaSignal
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  5. Opus 5.5 — r/ClaudeAI
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  8. Tutorial: Benchmarking GPT-6 Astra vs Claude Fable 5.1 vs GPT-5.6 Sol using W&B Weave — CoreWeave Blog

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