StepFun › Pricing
StepFun API pricing
per 1M tokens · list prices from the lab · checked Oct 23, 2026
$0.10 / $0.30cheapest · Step 3.5 Flash 2603
$1 / $2.70top ranked · Step 5 Preview
−81%cache read vs input
11models with a price
All StepFun modelsclick a row for its full price sheet
| Model | Input | Output | Cache read | Context | Released ↓ | Status |
|---|---|---|---|---|---|---|
Step 5 Preview | $1 | $2.70 | $0.10 | 1M | Sep 2026 | |
Step 3.7 Flash | $0.20 | $1.15 | $0.04 | 256K | May 2026 | |
Step 3.5 Flash 2603 | $0.10 | $0.30 | $0.02 | 256K | Apr 2026 | |
Step 1o Turbo Vision | $0.36 | $1.15 | $0.07 | — | — |
| Model | Type ↑ | Price | Released | Status |
|---|---|---|---|---|
Step Image Edit 2 | Image | $0.003 / image | May 2026 | |
Step1X Edit | Image | $0.03 / image | Apr 2025 | |
StepAudio 2.5 Realtime | Speech · Realtime | $1.50 / 1M tok | — | |
Step ASR | Speech · Speech to text | $0.002 / min | — | |
Step ASR 1.1 | Speech · Speech to text | $0.005 / min | — | |
Step ASR 1.1 Streaming | Speech · Speech to text | $0.006 / min | — | |
Step TTS 2 (Mar 2026) | Speech · Text to speech | $40 / 1M chars | Feb 2026 |
22 more without a listed price
StepFun pricing questions
How much does the StepFun API cost?›
StepFun API prices per 1M input / output tokens: Step 5 Preview $1 / $2.70, Step 3.7 Flash $0.20 / $1.15, Step 3.5 Flash 2603 $0.10 / $0.30, Step 1o Turbo Vision $0.36 / $1.15. Cached input is about 81% cheaper.
What is the cheapest StepFun model?›
Step 3.5 Flash 2603 at $0.10 / $0.30 per 1M tokens.
What is the most expensive StepFun model?›
Step 5 Preview at $1 / $2.70 per 1M tokens.
Is there a free StepFun API?›
No free API tier is listed for current StepFun models.
How much does Step 5 Preview cost?›
$1 / $2.70 per 1M input / output tokens, cache read $0.10.