Claude Opus 5.5 vs. Gemini 3.8 Flash

Quick Verdict: Route autonomous coding to Claude Opus 5.5 (84.2% SWE-bench Verified), hard scientific reasoning to Claude Opus 5.5 (94.1% GPQA Diamond), and high-volume cost-sensitive workloads to Gemini 3.8 Flash.

Claude Opus 5.5 (Anthropic)

94.6 pt

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

Gemini 3.8 Flash (Google DeepMind)

89.2 pt

SWE: 77.4% · GPQA: 89.6% · $0.30/1M · Adopt High-Speed

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