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Best StepFun Reasoning Models

Quick answer · Updated June 2026

The best StepFun model for reasoning is Step 3.7 Flash — 42.6 intelligence with extended step-by-step thinking. Step 3.5 Flash (37.8) is next.

42.6Intelligence
92 t/sSpeed
$0.200Input /M
256KContext

Large language models with extended reasoning / thinking, ranked by intelligence. The best models for complex multi-step reasoning, math and analysis.

  1. 1S
    step-3.7-flash
    ReasoningToolsJSON+142.6 intel · $0.200/M · 92 t/s
    42.6
    Intelligence
  2. 2S
    step-3.5-flash
    ReasoningToolsJSON37.8 intel · $0.090/M · 47 t/s
    37.8
    Intelligence

Frequently asked

What is the best StepFun model for reasoning?

The best StepFun model for reasoning is Step 3.7 Flash — 42.6 intelligence with extended step-by-step thinking. Step 3.5 Flash (37.8) is next.

What's a good alternative to Step 3.7 Flash?

Step 3.5 Flash (37.8) is the closest alternative on this metric. See the full ranking above for the tradeoffs.

How many StepFun models are there?

modelgrep tracks 2 StepFun models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by Step 3.7 Flash. 2 of them qualify for this ranking.

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