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 2026-10-16.
About cost estimation
Complete, recently synchronized token rates are not available for calculation. Check each row's billing units and source. To estimate StepFun alongside LLM models in a mixed workload, use the general spend calculator.
Open the spend calculator →Currently available rates
Step 1 (32K)
LLMstepfun-step-1-32kPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
$2.05
$9.59
$0.41
33K
33K
Sources: Official
Step 2 (16K)
LLMstepfun-step-2-16kPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
$5.21
$16.44
$1.04
16K
8K
Sources: Official
Step 3.5 Flash
LLMstepfun-step-3.5-flashPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
OpenRouter
global
1M Tokens
$0.10
$0.30
—
262K
66K
Official
global
1M Tokens
$0.10
$0.30
$0.02
256K
256K
Sources: OpenRouter · Official
Step 3.5 Flash 2603
LLMstepfun-step-3.5-flash-2603Platform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
$0.10
$0.30
$0.02
256K
256K
Sources: Official
Step 3.7 Flash
LLMstepfun-step-3.7-flashPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
OpenRouter
global
1M Tokens
$0.20
$1.15
$0.04
262K
230K
Official
global
1M Tokens
$0.19
$1.11
$0.04
256K
256K
Sources: OpenRouter · Official
Step 5 Preview
LLMstepfun-step-5-previewPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
$0.96
$2.74
$0.05
1000K
66K
Sources: Official
Step TTS 2
Audiostepfun-step-tts-2Platform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
-
-
—
—
—
Sources: Official
StepAudio 2.5 ASR
LLMstepfun-stepaudio-2.5-asrPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
-
-
—
—
—
Sources: Official
StepAudio 2.5 TTS
Audiostepfun-stepaudio-2.5-ttsPlatform
Region
Input / 1M
Output / 1M
Cached input
Context
Max Output
Official
global
1M Tokens
-
-
—
—
—
Sources: Official
StepFun Overview
Products, apps, and recent changes
StepFun Changes
API changes, pricing updates, and deprecations
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