- Step 3.5 Flash — $0.25 sample workload
- Step 3.7 Flash — $0.77 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.
2Models tracked
2Priced models
0Popular 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 3.7 Flash
262.14K context window
Popular pick
No current pick
No popular models are available.
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 3.7 Flash — 262.14K
- Step 3.5 Flash — 262.14K
StepFun comparisons
Search StepFun comparisons| Comparison | Sample Cost Winner | Larger Context | Newest Release |
|---|---|---|---|
| Aion-3.0 vs Step 3.7 Flash | Step 3.7 Flash | Step 3.7 Flash | |
| Aion-3.0-Mini vs Step 3.7 Flash | Step 3.7 Flash | Step 3.7 Flash | |
| Claude Fable 5 (batch) vs Step 3.7 Flash | Step 3.7 Flash | Claude Fable 5 (batch) | |
| Claude Fable 5 vs Step 3.7 Flash | Step 3.7 Flash | Claude Fable 5 | |
| Claude Fable Latest vs Step 3.7 Flash | Step 3.7 Flash | Claude Fable Latest | |
| Claude Opus 5 (batch) vs Step 3.7 Flash | Step 3.7 Flash | Claude Opus 5 (batch) | |
| Claude Opus 5 (Fast) vs Step 3.7 Flash | Step 3.7 Flash | Claude Opus 5 (Fast) | |
| 🔥Claude Opus 5 vs Step 3.7 Flash | Step 3.7 Flash | Claude Opus 5 |
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 |
|---|---|---|---|---|---|
| New🔥Ox Alpha | stealth | $0 | $0 | $0 | 1.05M |
| 🔥Nemotron 3 Ultra (free) | NVIDIA | $0 | $0 | $0 | 1M |
| 🔥Laguna S 2.1 (free) | Poolside | $0 | $0 | $0 | 262.14K |
| New🔥Nemotron 3.5 Lightning (free) | NVIDIA | $0 | $0 | $0 | 1M |
| NewDots3-Note Preview (free) | Dots Studio | $0 | $0 | $0 | 512K |
| NewLFM2.5-2.6B (free) | LiquidAI | $0 | $0 | $0 | 65.54K |
StepFun model catalog
Browse all models| Model | Prompt | Output | Context | Popularity |
|---|---|---|---|---|
| Step 3.7 Flash | $0.2 | $1.15 | 262.14K | |
| Step 3.5 Flash | $0.1 | $0.3 | 262.14K |