Step3: API pricing, providers and specs
Step3 is a text model by StepFun. One provider serves it: AIHubMix, at $2.75 /1M.
Lowest price$2.75/1Mat AIHubMix
Maker's price—The maker does not sell it
Providers1
Context—
How Step3 compares
Against the 737 text models on the site priced the same way.
- Pricey for its class: at $2.75 /1M, its lowest price is above 69% of comparable models (median $1.10).
- 1 providers serve it; 0% of comparable models have fewer.
- Its weights are open under the Apache 2.0 license: commercial use allowed.
Step3 prices by provider
Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.
| Provider | Input | Output | Prompt caching | Context |
|---|---|---|---|---|
 AIHubMix | $1.10/1M | $2.75/1M | — | — |
Prices in US dollars, updated daily from each provider. Prices last checked Oct 25, 2026.
Specs
- Type
- Text
- Maker
- StepFun
- Inputs
- Text
- Outputs
- Text
- Context
- —
- Max output
- —
- Capabilities
- —
- Released
- Jul 28, 2025
- License
- Apache 2.0commercial use allowed
- Open weights
- Yes, downloadable
- Parameters
- 321B
Alternatives to Step3
Same kind of model from other makers, at a similar price.
| Model | Lowest price | Context | Arena | Providers |
|---|---|---|---|---|
| Step3this model | $2.75/1M | — | — | 1 |
 Gemini 4 Argon | $8/1M | 1.05M | 1673 | 26 |
| GPT-6.1 Sol | $8/1M | 1.05M | 1749 | 27 |
 GLM-5.3 | $1.10/1M | 1.05M | 1623 | 49 |
| GPT-6 Sol | $8/1M | 1.05M | 1682 | 28 |
 Qwen3.8 2.4T A95B | $4.11/1M | 1M | — | 22 |
| Grok 4.7 | $4.80/1M | 500K | 1637 | 28 |
| Gemini 3 Flash | $2.40/1M | 1.05M | 1466 | 5 |
 Mistral Large 4 | $2.09/1M | 1.05M | 1543 | 13 |
More from StepFun
GOT-OCR 2.0StepFun$0.05/imgStep 2 16KStepFun$2/1MStep 3.5 FlashStepFun$0.292/1MStep 3.5 Flash 2603StepFun$0.30/1MStep 3.7 FlashStepFun$0.925/1MStep 5 PreviewStepFun$2.70/1MStepaudio 2.5StepFun$3.50/1MStepaudio 2.5 RealtimeStepFun$10/1MStep3 FAQ
The lowest price for Step3 is $2.75 /1M, at AIHubMix.
Yes. Step3's weights can be downloaded from its maker's Hugging Face page, under the Apache 2.0 license.
About 321B, as the safetensors metadata of its official Hugging Face repo states.
1 API providers serve Step3. Compare their prices above, or open a provider to see everything it offers.
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