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Anthropic shipped Claude Opus 5 on 24 July 2026 and OpenAI shipped GPT-5.6 (Sol, Terra, Luna) on 9 July. For coding agents the two flagships cost almost the same on input and diverge on output, benchmarks and token
Anthropic's Claude Opus 5 matches near-Fable-5 intelligence at 26% lower cost per task. A guide to the coding-agent benchmarks, the token economics, and when Opus 5 should be your default.
Claude Opus 5 launched 24 July 2026 at unchanged $5/$25 per-million pricing, with a five-level effort parameter (low, medium, high, xhigh, max) that governs token spend across text, tool calls and thinking. Here is how
