Step 3.5 Flash
Step 3.5 Flash — StepFun multimodal model with an Intelligence Index of 29, a 262K-token context window and a blended price of $0.12/1M tokens.
Key specifications
| Intelligence Index | 29 |
|---|---|
| Coding Index | — |
| Agentic Index | — |
| Arena Elo | — |
| Context window (K tokens) | 262 |
| Blended price ($/1M tokens) | 0.1 |
| Output speed (tokens/s) | 239 |
About Step 3.5 Flash
The Step 3.5 Flash is a multimodal model from StepFun with an Intelligence Index of 29.0 and a 262K-token context window. It runs at a blended price of $0.12 per million tokens and generates about 239 tokens/s. It is proprietary api. Leaderboard indices are a strong signal but only part of real-world quality, which also depends on tool use, latency and task fit.
The comparisons below show how Step 3.5 Flash stacks up against the alternatives people most often weigh against it, with the specific numbers laid out side by side.
Frequently asked questions
Is the Step 3.5 Flash any good?
Step 3.5 Flash — StepFun multimodal model with an Intelligence Index of 29, a 262K-token context window and a blended price of $0.12/1M tokens.
What are the key specs of the Step 3.5 Flash?
See the specification table above for the full breakdown.