GPT-6 Astra vs. Claude Sonnet 5.5

Quick Verdict: Route autonomous coding to GPT-6 Astra (83.4% SWE-bench Verified), hard scientific reasoning to GPT-6 Astra (96.0% GPQA Diamond), and high-volume cost-sensitive workloads to Claude Sonnet 5.5.

GPT-6 Astra (OpenAI)

94.1 pt

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

Claude Sonnet 5.5 (Anthropic)

92.8 pt

SWE: 82.9% · GPQA: 91.4% · $3.00/1M · Adopt Now

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