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7/26/2026
Anthropic launches Claude Opus 5 with 1M context window and agentic coding improvements

Anthropic launches Claude Opus 5 with 1M context window and agentic coding improvements

Original: Claude Opus 5 Is Here: Fable 5 Intelligence at Half the Price

Short summary

Anthropic released Claude Opus 5 on July 24, claiming a step-change over Opus 4.8 with deep reasoning, agentic coding, and long-horizon task improvements. The model features a 1M token context window, 128k max output tokens, thinking enabled by default with five effort levels, and shipped across Claude API, AWS, Google Cloud, and Microsoft Foundry. A breaking change: thinking cannot be disabled when effort is set to xhigh or max, which may affect existing integrations.

  • •Claude Opus 5 ships with 1M context window, 128k output, thinking on by default with five effort levels
  • •Model is positioned for agentic coding and long-horizon workflows, not chat interactions
  • •Breaking change: thinking cannot be disabled at xhigh or max effort levels, impacting existing integrations

Generated with AI, which can make mistakes.

#product-launch#ai-tools#ai-agents
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