GPT-5.5 vs Grok 4
GPT-5.5 (OpenAI) and Grok 4 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- GPT-5.5 leads on overall intelligence (ECI 159 vs 147).
- GPT-5.5 ranks higher for coding (89th vs 15th percentile).
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is GPT-5.5 better than Grok 4?
On Epoch AI's Capabilities Index, GPT-5.5 scores higher (159) than Grok 4 (147). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is better for coding, GPT-5.5 or Grok 4?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, GPT-5.5 ranks higher — 89th vs 15th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.