What is Opus 4.7?

Opus 4.7 is an AI model from Anthropic. In May 2026, Nathaniel Whittemore reported Opus 4.7 scored 69.3% on Terminal Bench 2.0 and 80.5% on SweBench multilingual, comparable to GPT-5.5’s 77.8%. Whittemore also said a competing model performed comparably to Opus 4.7 and GPT-5.5 across settings, but at 10 to 60x lower cost. Greg Isenberg noted that GPT-5.5 is more efficient with tool calls than Opus 4.7, which consumes more tokens for agent tasks.