Documentation Index
Fetch the complete documentation index at: https://platform.stepfun.ai/docs/llms.txt
Use this file to discover all available pages before exploring further.
Pricing Details
Pricing for Reasoning Models
| Model | Billing Unit | Input (Cache Miss) | Input (Cache Hit) | Output Price |
|---|
| step-3.5-flash-2603 | 1M tokens | $0.10 | $0.02 | $0.30 |
| step-3.5-flash | 1M tokens | $0.10 | $0.02 | $0.30 |
Pricing for Speech Models
| Model | Model Type | Unit Price |
|---|
| stepaudio-2.5-tts | Contextual text-to-speech model | $0.85 / 10,000 characters |
| step-tts-2 | Text-to-speech model | $0.40 / 10,000 characters |
| stepaudio-2.5-tts / step-tts-2 | Voice cloning model | $1.50 / voice |
| stepaudio-2.5-asr | Speech recognition model | $0.022 / hour |
Tiered Rate Limits
Top-Up and Rate Limits Table
To ensure fair overall resource allocation and prevent abuse, we apply rate limits based on your account’s cumulative top-up amount. Details are below:
| User Tier | Cumulative Top-Up Amount | Concurrency | RPM | TPM |
|---|
| V0 | $0 | 5 | 10 | 5,000,000 |
| V1 | $15 | 100 | 1,000 | 20,000,000 |
| V2 | $70 | 200 | 5,000 | 30,000,000 |
| V3 | $300 | 400 | 10,000 | 40,000,000 |
| V4 | $700 | 1,000 | 20,000 | 50,000,000 |
| V5 | $1,500 | 10,000 | 200,000 | 100,000,000 |
Definitions
- Concurrency: number of requests at the same time
- RPM: request per minute, the maximum number of requests you can make to us per minute
- TPM: token per minute, the maximum number of tokens you can interact with us per minute
Notes
- Our default rate limits are intended to allocate resources more fairly. If you believe you need higher and more stable limits, please contact our staff in advance; we will respond within two business days. Contact email: platform@stepfun.com
- We will do our best to ensure normal usage, but when resources reach capacity, we may take temporary throttling measures and adjust rate limits.
