Step 3.5 Flash 2603
Step 3.5 Flash 2603 — StepFun multimodal model with an Intelligence Index of 29, a 262K-token context window and a blended price of $0.06/1M tokens.
Key specifications
| Intelligence Index | 29 |
|---|---|
| Coding Index | — |
| Agentic Index | — |
| Arena Elo | — |
| Context window (K tokens) | 262 |
| Blended price ($/1M tokens) | 0.1 |
| Output speed (tokens/s) | 248 |
About Step 3.5 Flash 2603
The Step 3.5 Flash 2603 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 $0.06 per million tokens and generates about 248 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 2603 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 2603 any good?
Step 3.5 Flash 2603 — StepFun multimodal model with an Intelligence Index of 29, a 262K-token context window and a blended price of $0.06/1M tokens.
What are the key specs of the Step 3.5 Flash 2603?
See the specification table above for the full breakdown.