Step 3.5 Flash
Stepfun · stepfun/step-3.5-flash
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Step 3.5 Flash ranks #100 of 348 models in the default AI Benchmark Hub order (quality first, then cost). At $0.20 blended per million tokens, it is cheaper than 81% of models with published API pricing. Its 262,144-token context window is about the catalog median (262,144 tokens).
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Context
Max context: 262144
Max output: 65536
Max output: 65536
Pricing
Input / 1M: 0.10
Output / 1M: 0.30
Blend / 1M: 0.20
Output / 1M: 0.30
Blend / 1M: 0.20
Quality
Quality index: —
Provider
Provider: Stepfun
Moderated: no
Moderated: no
Monthly cost at this blended rate
Estimated API spend if every token is billed at $0.20per million (the blend of this model's input and output prices). Real bills depend on the input/output mix.
| Tokens / month | Est. cost (USD) |
|---|---|
| 1,000,000 | $0.20 |
| 10,000,000 | $2.00 |
| 100,000,000 | $20.00 |
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