StepFun: Step 3.7 Flash
StepFun: Step 3.7 Flash is a versatile AI model that supports text, image, and video inputs, with a substantial context length of 262,144 tokens. It can handle complex tasks requiring reasoning and tools, though it does not generate structured output. The model scores well on benchmarks for both coding and agentic tasks but slightly lower in the AI index category. This model is suitable for users looking to process diverse data types and perform detailed analyses; its pricing at $0.2 per million input tokens and $1.15 per million output tokens makes it cost-effective for extensive use cases, especially considering its benchmark blended score of 50.1 across three independent evaluations.
Benchmark results
Independent, published benchmarks. Blended score 50.1 across 3 benchmarks, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 51.0 |
| AI Index Coding | software engineering tasks | 65.3 |
| AI Index Agentic | multi-step tool-using tasks | 35.9 |
- Model ID
- stepfun/step-3.7-flash
- Vendor
- stepfun
- Released
- May 2026
- Tokenizer
- Other
- Input Modalities
- text, image, video
- Output Modalities
- text
- Max Output
- 256,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.20/M input and $1.15/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.16 |
| A month of a busy support chatbot | 5M in / 2M out | $3.30 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-07-22 | $0.20 | $1.15 | 262,144 |
| 2026-07-17 | $0.20 | $1.15 | 256,000 |
Category rankings
Where StepFun: Step 3.7 Flash places across the 2 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #9 | Video Auto-TaggingVideo · of 25 ranked | 123 |
| #24 | Real-Time ChatLatency · of 25 ranked | 117 |
Similar models
Quick answers
- How much does StepFun: Step 3.7 Flash cost?
- $0.20 per million input tokens and $1.15 per million output tokens.
- What is StepFun: Step 3.7 Flash's context window?
- 262,144 tokens, roughly 393 pages of text in a single request.
- Does StepFun: Step 3.7 Flash support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can StepFun: Step 3.7 Flash process images?
- Yes, it accepts image input.