StepFun
Step 3.5 Flash API pricing
Step 3.5 Flash is StepFun’s model on the API market, released 29 Jan 2026. Prices are per million tokens in USD, as last read from the price list.
$0.10Input / 1M
$0.30Output / 1M
262KContext
66KMax output
Specification
USD per million tokens- Provider
- StepFun
- Model id
stepfun/step-3.5-flash- Input
- $0.10
- Output
- $0.30
- Cached input
- Not published
- Context window
- 262K tokens
- Maximum output
- 66K tokens
- Takes
- text
- Returns
- text
- Tool use
- Yes
- Reasoning
- Yes
- Released
- 29 Jan 2026
- First tracked
- 17 Sept 2026
At $0.10 per million input tokens, Step 3.5 Flash is dearer than 53 of the 326 models on the price list.
Price changes
Tracked since 17 Sept 2026No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.
More from StepFun
Cheapest input firstPrices and specifications come from OpenRouter’s catalogue, last read 17 Sept 2026. A provider’s own price may differ; how this is collected.