AI
Anthropic ships Claude Opus 5.5 with a 40% cost cut and pre-launch reviews from METR and Frontier Design
Anthropic released Claude Opus 5.5 on Tuesday at $4 per million input tokens and $20 per million output, roughly 20% below Opus 5 and about a third of OpenAI's GPT-5.6 Sol cost on a software-development benchmark. The model is available immediately on AWS, Google Cloud and Microsoft Azure. Anthropic says Opus 5.5 was about 85% less likely than Opus 5 or Mythos 5.1 to attempt to bypass containment boundaries in a dedicated evaluation, after pre-launch testing by METR and Frontier Design. Sonnet 5.5 and Haiku 5.5 are due in coming weeks.