โจ Claude Opus 5 matches Fable-5 intelligence at half the cost โ with a self-check mode
Anthropic launched Claude Opus 5 on July 24 with a 1M-token context window and a new effort dial that lets users slide between low, medium, and high compute per query. It sits at the top of coding benchmarks like Frontier-Bench and GDPval-AA, and it verifies and corrects its own work without being asked. It is now the default model on Claude Max. Is self-verifying AI the tipping point for trusting agents with real tasks?
