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ClaudeDevs@ClaudeDevs · Jul 24, 2026

Opus 5 is live in Claude Code and the Claude Platform today. A few things worth knowing: 🧵

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Summary

Claude's new Opus 5 model is now available, achieving state-of-the-art performance on coding benchmarks with 43.3% on Frontier-Bench, excelling at complex multi-stage coding projects and offering both high-effort and fast modes for different use cases.

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  1. #1

    Opus 5 is live in Claude Code and the Claude Platform today. A few things worth knowing: 🧵

    Claude@claudeai · Jul 24, 2026

    Introducing Claude Opus 5. It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price.

  2. #2

    On agentic terminal coding (Frontier-Bench v0.1), Opus 5 is the new state of the art at 43.3%: ahead of Fable 5 (33.7%) and more than double Opus 4.8. On FrontierCode v1.1 it matches Fable 5, at half the price.

  3. #3

    Opus 5 is a step-change in coding for the Opus class. It excels at long-horizon projects in large codebases, handling architecture, deployment, and design-quality UI. It’s better at staying on track across multi-stage work, allowing you to delegate more.

  4. #4

    Opus 5 defaults to high effort in Claude Code and Claude Platform. Turn it up for your hardest problems, or down for faster, cheaper turns. Fast mode is also available: ~2.5x faster at 2x base price, on the Claude Platform and in Claude Code via extra usage.

  5. #5

    On Claude Platform, Opus 5 supports mid-conversation tool changes: add or remove tools without invalidating your prompt cache. We also added fallback routing: classifier-blocked requests are routed to our recommended model based on the request. platform.claude.com/docs/en/about-…

  6. #6

    To upgrade existing workloads to Opus 5, run `/claude-api migrate` in Claude Code. The built-in claude-api skill updates your model strings and suggests prompt improvements that are tuned for Opus 5.

  7. #7

    Try Opus 5 today. Use “claude-opus-5” on the Claude API, or run “/model claude-opus-5” in Claude Code. platform.claude.com/docs/en/about-…