Claude Opus 5.5 vs. GPT-6 Astra

Quick Verdict: Route autonomous coding to Claude Opus 5.5 (84.2% SWE-bench Verified), hard scientific reasoning to GPT-6 Astra (96.0% GPQA Diamond), and high-volume cost-sensitive workloads to Claude Opus 5.5.

Claude Opus 5.5 (Anthropic)

94.6 pt

SWE: 84.2% · GPQA: 94.1% · $6.00/1M · Adopt Now

GPT-6 Astra (OpenAI)

94.1 pt

SWE: 83.4% · GPQA: 96.0% · $7.50/1M · 18d Pulse Wave

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