StepFun: Step 3.5 Flash
Stepfun · Tools · Reasoning controls · Sampling controls · Output limits · Released Jan 29, 2026
Best input$0.1Lowest linked input observation · live snapshot
Best output$0.3May come from a different provider
Context window262.1K262,144 tokens
Provider profiles1Price observed Aug 22, 2026 01:39 UTC
Provider pricing
Compare provider prices
Published rates for providers serving this model. Open any source to see where and when the price was checked.
| Provider | Input | Output | Cached input | Batch input | Evidence |
|---|---|---|---|---|---|
 OpenRouter openrouter.ai ↗ | $0.1/ 1M | $0.3/ 1M | Not published | Not published | Sourcehttps://openrouter.ai/api/v1/models See where this value came from and when it was checked.
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Performance
Published benchmark results
Benchmark results collected from published sources. Scores from different benchmark versions or test setups may not be directly comparable.
| Benchmark | Category | Score | Origin | Evidence |
|---|---|---|---|---|
| Artificial Analysis Intelligence | reasoning | 40.00 | Public benchmark | SourceArtificial Analysis Intelligence via openlm.ai See where this value came from and when it was checked.
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| Chatbot Arena Elo | reasoning | 1387.00 | Public benchmark | SourceChatbot Arena Elo via openlm.ai See where this value came from and when it was checked.
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| Chatbot Arena Coding Elo | reasoning | 1433.00 | Public benchmark | SourceChatbot Arena Coding Elo via openlm.ai See where this value came from and when it was checked.
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| MMLU-Pro | reasoning | 83.50 | Public benchmark | SourceMMLU-Pro via openlm.ai See where this value came from and when it was checked.
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History
Recent changes
Recorded changes in pricing, availability and other tracked model data.
No recorded changes for this model yet.