Step 3.7 Flash
Step 3.7 Flash is StepFun's language model with a 256K context window, available from 2 providers, starting at $0.200 / 1M input and $1.15 / 1M output. A high-efficiency multimodal Mixture-of-Experts LLM combining a large language backbone with a vision encoder for native image and video understanding.
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video✓
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities4/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·
Pricing by Provider
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
 OpenRouter | $0.200 | $1.15 | $0.040 |
 Vercel AI Gateway | $0.200 | $1.15 | $0.040 |
Cost Calculator
Preset:
Other models
| Model | Tier | Released | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|---|
| Step 3 VL 10B | — | — | — | — | — |
| Step 1X Edit 1.2 | — | — | — | — | — |
| Step 1X Edit | — | — | — | — | — |