Anthropic releases Opus 5.5 with lower prices and Fable-level performance
Anthropic released cheaper, faster Claude Opus 5.5 and called it its strongest model.
Anthropic released Claude Opus 5.5 on Tuesday and called it the strongest model it has tested, saying it outpaces the larger Fable model on many coding and knowledge-work benchmarks. Output tokens cost $20 per million, compared with $25 for Opus 5, and Anthropic said the model is faster and needs less compute. The company says its biology and cybersecurity capabilities are comparable to Mythos, so Fable-level safeguards limit uses such as exploit discovery in compiled programs and assistance with biological weapons. Sonnet 5.5 and Haiku 5.5 are expected in the coming weeks, and METR and Frontier Design evaluated the release.
- Output tokens cost $20 per million, down from $25 for Opus 5.
- Anthropic calls Opus 5.5 its strongest model tested to date.
- It beat larger Fable on many coding and knowledge benchmarks.
- Biology and cybersecurity safeguards match those applied to Fable.
- Sonnet 5.5 and Haiku 5.5 are planned in the coming weeks.
- Vendors
- Anthropic
- Products
- Claude
- Organizations
- AnthropicMETRFrontier Design
From the original article
2 min read at techcrunch.com
Anthropic called it "the strongest-performing model we've tested to date."
By Russell Brandom · techcrunch.com
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