- Step 3.5 Flash — $0.25 sample workload
- Step 3.7 Flash — $0.77 sample workload
- Step 5 Preview — $2.35 sample workload
StepFun LLM API Models & Pricing
Browse StepFun LLM API models with normalized prompt pricing, output pricing, context windows, release dates, and popularity signals.
3Models tracked
3Priced models
1Popular models
0Latest releases
Provider shortlist
Use StepFun as a model-level shortlist, not a single default choice.
Start from the cost, context, and popularity picks below, then open the model pages or head-to-head comparisons before choosing an API.
Cost pick
Step 3.5 Flash
$0.25 sample workload
Context pick
Step 5 Preview
1.05M context window
Popular pick
Step 5 Preview
#9 popularity signal
When to avoid
Verify model fit
Do not choose by provider name alone. Compare model-level input price, output price, context window, release timing, and current availability before production use.
- Step 5 Preview — 1.05M
- Step 3.7 Flash — 262.14K
- Step 3.5 Flash — 262.14K
StepFun comparisons
Search StepFun comparisons| Comparison | Sample Cost Winner | Larger Context | Newest Release |
|---|---|---|---|
| 🔥Claude Opus 5.5 vs 🔥Step 5 Preview | Step 5 Preview | Step 5 Preview | |
| New🔥DeepSeek V4.1 Flash 1017 vs 🔥Step 5 Preview | DeepSeek V4.1 Flash 1017 | Tie | |
| 🔥DeepSeek V4.1 Flash vs 🔥Step 5 Preview | DeepSeek V4.1 Flash | Tie | |
| 🔥GLM 5.3 Flash vs 🔥Step 5 Preview | GLM 5.3 Flash | Tie | |
| 🔥GPT-6 Luna vs 🔥Step 5 Preview | GPT-6 Luna | GPT-6 Luna | |
| 🔥Hy4 preview vs 🔥Step 5 Preview | Hy4 preview | Tie | |
| New🔥Kimi K3.1 Pro vs 🔥Step 5 Preview | Step 5 Preview | Tie | |
| New🔥MiniMax M3.1 Flash vs 🔥Step 5 Preview | MiniMax M3.1 Flash | Tie |
Cross-Provider Alternatives
Open alternatives hubUse this shortlist when StepFun is not a hard requirement and your first constraint is workload cost.
| Alternative | Provider | Sample Cost | Input / 1M | Output / 1M | Context |
|---|---|---|---|---|---|
| NewCrouton Alpha | stealth | $0 | $0 | $0 | 1.05M |
| NewFlint (free) | Recursive | $0 | $0 | $0 | 262.14K |
| NewMiniMax M3.1 Flash (free) | MiniMax | $0 | $0 | $0 | 1M |
| NewXing4.0 29B A4B (free) | XingChen | $0 | $0 | $0 | 262.14K |
| Nemotron 3.5 Super VL (free) | NVIDIA | $0 | $0 | $0 | 1M |
| Apodex 1.1 Mini (free) | Apodex | $0 | $0 | $0 | 262.14K |
StepFun model catalog
Browse all models| Model | Prompt | Output | Context | Popularity |
|---|---|---|---|---|
| 🔥Step 5 Preview | $1 | $2.7 | 1.05M | #9 |
| Step 3.7 Flash | $0.2 | $1.15 | 262.14K | |
| Step 3.5 Flash | $0.1 | $0.3 | 262.14K |