Claude Opus 5 from @AnthropicAI is live on OpenRouter!
Opus 5 matches or surpasses Fable 5 on many benchmarks at a lower cost per task, while delivering substantial gains over Opus 4.8 on others.
Claude Opus 5 from Anthropic is now available on OpenRouter as of 2026-07-24.
Brief
Claude Opus 5, released by Anthropic and made live on OpenRouter on 2026-07-24, reportedly equals or outperforms Fable 5 across many benchmarks while reducing cost per task. The model also shows substantial improvements compared with Anthropic's prior Opus 4.8 on additional evaluation metrics, positioning Opus 5 as a cost- and performance-focused upgrade.
Why it matters
Claude Opus 5 from Anthropic is now available on OpenRouter as of 2026-07-24.
Key details
- Opus 5 matches or surpasses Fable 5 on many benchmarks while offering a lower cost per task.
- Opus 5 delivers substantial performance gains over Anthropic's Opus 4.8 on other benchmarks.