GPT-5.5 vs Step 3.7 Flash
GPT-5.5 (OpenAI) and Step 3.7 Flash (StepFun) compared on benchmarks, pricing, context window, and use-case rankings.
- Step 3.7 Flash is cheaper on input tokens — $0.20 vs $5.00 per 1M.
- GPT-5.5 has a larger context window (1.1M vs 256K tokens).
- GPT-5.5 ranks higher for coding (91th vs 32th 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
Which is cheaper, GPT-5.5 or Step 3.7 Flash?
Step 3.7 Flash is cheaper on input tokens at $0.20 per million, versus $5.00 (representative OpenRouter pricing).
Which has a larger context window, GPT-5.5 or Step 3.7 Flash?
GPT-5.5 supports up to 1.1M tokens, compared with 256K for the other.
Which is better for coding, GPT-5.5 or Step 3.7 Flash?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, GPT-5.5 ranks higher — 91th vs 32th 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.