Anthropic launches Opus 5.5, offering improved performance and lower pricing

Sep 22, 2026

AI Summary

Anthropic has introduced Opus 5.5, a new AI model that surpasses its predecessor in performance while reducing costs. The model is designed to communicate more effectively and includes safety measures similar to previous models.

Anthropic released Opus 5.5, which reportedly outperforms the larger Fable model in various benchmarks and informal tasks.
The pricing for Opus 5.5 is set at $20 per million output tokens, down from $25 for the previous model, with similar reductions in other metrics.
Opus 5.5 features improved communication, using less jargon and prioritizing important information.
This launch follows the release of Opus 5 just two months prior, with additional models, Sonnet 5.5 and Haiku 5.5, expected soon.
The new model includes safeguards similar to those of the Fable model, restricting its use in sensitive areas like exploit discovery and biological weapon development.
CEO Dario Amodei has emphasized a cautious approach to AI development, advocating for a balance between capability advancement and risk management.
Safety training for Opus 5.5 was similar to earlier models, with plans for enhanced training and evaluation systems for future releases.
Anthropic is working on infrastructure to ensure AI systems are safe, with intentions to provide more information on these initiatives in the future.

anthropicopus 5.5model performanceai researchlanguage models

Anthropic launches Opus 5.5, offering improved performance and lower pricing

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