Anthropic ships Claude Opus 4.8 as a "modest but tangible improvement" that tops GPT-5.5 in most benchmarks

In three linesAnthropic releases Claude Opus 4.8, outperforming GPT-5.5 and Gemini 3.1 Pro on most benchmarks. The model catches its own coding errors 4× better than its predecessor. Anthropic also rolls out dynamic workflows enabling hundreds of parallel sub-agents for codebase-wide migrations.

Summary generated by Claude — human-verified