Anthropic · Claude · Mythos · Anthropic
Mariano-Florentino (Tino) Cuéllar will join Anthropic as its first Chief Global Affairs Officer
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★ Tier-1 Source
Claude Opus 5 is available today.
Key facts
- Claude Opus 5 is available today on all platforms, priced at $5 per million input tokens and $25 per million output tokens (the same as Opus 4.8)
- Frontier-Bench v0.1, Effort plot: These results are from an internal run of Frontier-Bench v0.1, on the mini-SWE-agent harness and a GKE backend, mean reward over 5 attempts per task
- For example, on Frontier-Bench v0.1, Opus 5 surpasses all other models, and more than doubles Opus 4.8’s performance at a lower cost per task
- Claude Opus 5 provides greatly improved performance for the same cost as its predecessor, Opus 4.8
Summary
On coding and knowledge work evaluations like Frontier-Bench and GDPval-AA, Opus 5 is the new state-of-the-art, though it remains behind Mythos 5 on cybersecurity tasks. Opus 5 is designed to be used every day: it works more efficiently than other models. Claude Opus 5 provides greatly improved performance for the same cost as its predecessor, Opus 4.8. Opus 5 excels on valuable software engineering tasks. On ARC-AGI 3, an evaluation where the model has to solve novel problems, Opus 5’s score is three times as high as the next-best model.