StepFun API Pricing
Complete pricing for all StepFun models. Input/output costs per 1M tokens, context windows, and rate limits.
Billing terms: priced in USD per 1M tokens unless a row states otherwise; official direct rates are listed separately from third-party channels, and regional prices are kept distinct. Record updated 2026-10-11.
StepFun API Pricing Calculator
Select a model to estimate monthly cost using its listed rates on each channel.
Workloads reusing system prompts, long documents, or conversation history hit more; channels without a cached rate are billed at the full input rate.
| Channel | Effective input | Output /1M | Est. / month |
|---|---|---|---|
| official | $1.23(w/ cache) | $9.59 | $10.13 |
Formula: monthly cost = (input tokens × effective input rate + output tokens × output rate) ÷ 1,000,000 × calls. The effective input rate blends list and cached rates at your cache-hit share. Rates share the selected model and billing basis; your vendor bill is authoritative.
Currently available rates
Step 1 (32K)
LLMstepfun-step-1-32kStep 2 (16K)
LLMstepfun-step-2-16kStep 3.5 Flash
LLMstepfun-step-3.5-flashStep 3.5 Flash 2603
LLMstepfun-step-3.5-flash-2603Step 3.7 Flash
LLMstepfun-step-3.7-flashStep 5 Preview
LLMstepfun-step-5-previewStep TTS 2
Audiostepfun-step-tts-2StepAudio 2.5 ASR
LLMstepfun-stepaudio-2.5-asrStepAudio 2.5 TTS
Audiostepfun-stepaudio-2.5-ttsDoes this change your best option?
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