StepFun
StepFun 3.5 Flash
StepFun flash lane for quick multimodal reasoning and coding assistance
Model facts
- Context window
- 262K tokens
- Maximum output
- 262K tokens
- Cheapest paid input
- $0.09 per 1M tokens
- Cheapest paid output
- $0.3 per 1M tokens
- Open weights
- yes
- Providers
- 1
Capabilities and modalities
reasoning, tool calling, temperature control, open weights, text, image.
Observed price history
- 2026-08-24: $0.09 input / $0.3 output per 1M tokens
API providers
- Vercel AI Gateway — model id stepfun/step-3.5-flash; $0.09 input / $0.3 output per 1M tokens; provider documentation