Anthropic launches Opus 5
TechCrunch AI Russell Brandom ● Covered by 7 sources
Anthropic released Opus 5, a model smaller than its Fable 5 but cheaper and less restrictive while outperforming Fable 5 on several benchmarks. The model launched two months after Opus 4.8, and Anthropic reports its safety classifiers will engage 85% less often for Opus 5 than for Fable 5. Users now have access to a model with fewer restrictions and a new Automatic Fallbacks feature that routes blocked requests to a weaker model instead of returning an error.
Why it matters
Opus 5 will be both cheaper and less restrictive than Fable, likely making it preferable in most use cases
Also covered by
- Anthropic News — Introducing Claude Opus 5
- The New Stack — Anthropic’s Opus 5 is almost Fable 5
- Sakana AI — Announcing Fugu-Ultra v1.1 and Claude Code interface for Fugu
- The Verge — Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities
- The Batch — Mythos Begets Fable, Cursor's Composer 2.5, Agents Building Agents
- The Batch — Testing Mythos and Fable, Moving Beyond SWE-bench, Nvidia's Open Contender
