Step 3.7 Flash review, price and benchmarks (2026)

public free open-weights api in Generator speed multilingual

Provider

Statuspublic

AA Intelligence Index30.3 (July 16, 2026 snapshot)

Releasedn/a

Context windown/a

Modalitiesn/a

API price $/1M (in / out)n/a

Speedn/a

AccessOpen weights · API

In one line

StepFun's fast open tier - part of the broad Chinese open-weight wave now taking ~45% of OpenRouter traffic.

Coding54

Reasoning52

Writing50

Agents & tools46

Category scores (0-100) are WhichAI blended ratings: public category leaderboards plus editorial judgment. Guidance, not official measurements.

Alternatives worth a look

Mistral Medium 3.5 (Mistral AI) · AA 29.9Open weights · Le Chat · API
Gemma 4 31B (Google) · AA 29.4Open weights · runs on consumer hardware
Gemini 3 Flash (Google) · AA 27.4Free tier · cheap API

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Artificial Analysis Intelligence Index, 2026 rebased scale (top models ≈ 55–60). Snapshot: July 24, 2026 (BenchLM mirror), retrieved July 26, 2026. Context, price and release data come from vendor pages and public pricing mirrors (retrieved July 19, 2026). Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (Model guide and About > Methodology).