Key facts
- Anthropic launched Claude Opus 5.5, a new family of Claude 5.5 models, on Tuesday.
- Opus 5.5 costs about 40% less to run than Opus 5, with input pricing at $4 per million tokens and output pricing at $20 per million tokens.
- Cached reads for Opus 5.5 cost $0.20 per million tokens, a 60% reduction from Opus 5.
- Output generation speed has accelerated by over 30% with Opus 5.5.
- Opus 5.5 achieved a 66.4% score on Terminal-Bench 4.0, compared to Opus 5's 52.3%.
- US President Donald Trump opposes new rules that could slow AI development.
Anthropic has launched its Claude Opus 5.5 AI model, aiming to reduce costs and improve performance for enterprise users as competition in the AI sector intensifies. The new model is priced at $4 per million input tokens and $20 per million output tokens, representing a 40% decrease compared to its predecessor, Opus 5. Cached reads have seen a 60% reduction, costing $0.20 per million tokens, while output generation speed has increased by over 30%.
Anthropic claims Opus 5.5 offers performance comparable to its Fable 5.1 model on most tasks, with notable improvements in coding and professional knowledge benchmarks. On Terminal-Bench 4.0, Opus 5.5 scored 66.4%, surpassing Fable 5.1's 55.8% and GPT-6 Astra's 57.9%. The company also reported significant gains in long-running coding tasks, with Opus 5.5 completing a 680,000-line code migration in less than a day, a task that took over 20 hours with Opus 5.
The release coincides with broader discussions on AI safety and development speed, with Anthropic CEO Dario Amodei advocating for a slower pace. However, US President Donald Trump has expressed opposition to regulations that could hinder AI growth, emphasizing the need not to "stifle growth."
Anthropic is reportedly preparing for a potential November IPO, with figures suggesting a valuation near $2 trillion. The company is expanding its distribution channels through cloud providers like Amazon Web Services, Google Cloud, and Microsoft Azure, in addition to its own Claude platform. Anthropic plans to release Claude Sonnet 5.5 and Claude Haiku 5.5 in the coming weeks.