Anthropic Announces Claude Opus 4.1

ArticleAnthropicAnnouncement

Anthropic has released Claude Opus 4.1, offering upgrades in agentic workflows, real-world coding, and reasoning at the same pricing as Opus 4.

Key points

  1. Claude Opus 4.1 achieves a 74.5% score on SWE-bench Verified without extended thinking.
  2. Available to paid Claude subscribers, within Claude Code, via the API, and through Amazon Bedrock and Google Cloud Vertex AI.
  3. Pricing matches Opus 4 with no cost increase.
  4. Feedback from GitHub, Rakuten Group, and Windsurf highlights improvements in multi-file refactoring, targeted bug fixing, and developer benchmarks.
  5. The SWE-bench scaffold simplifies tool use to bash and string-replacement editing, dropping the dedicated planning tool used by Sonnet 3.7.

Why it matters

The point release provides immediate improvements in code editing accuracy and multi-file codebases without requiring price adjustments or scaffold changes.

Analysis

Anthropic recommends Opus 4.1 as a drop-in replacement for all Opus 4 use cases. The benchmark disclosures reveal a streamlined evaluation scaffold that relies on basic execution and editing tools rather than complex planning layers. Anthropic also flags this release as a precursor to more substantial model updates expected in subsequent weeks.

Mentioned links

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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