Major Release StepFun · Released
Step 3.7 Flash
What is Step 3.7 Flash?
Step 3.7 Flash is a Major Release AI model from StepFun, released on May 29, 2026. It has a 256K tokens context window, costs $0.20 per million input tokens, and scores 98.5% on TAU2-bench. It is available as open source.
StepFun Step 3.7 Flash — AA Intelligence Index 42.6, 256K tokens context, reasoning model.
How much does Step 3.7 Flash cost?
| Metric | Price |
|---|---|
| input per mtok | $0.20 |
| output per mtok | $1.15 |
| cache read per mtok | $0.04 |
Pricing data verified .
What context window does Step 3.7 Flash have?
- Context window
- 256K tokens
- Max output
- 256K
- Input modalities
- text, image
- Output modalities
- text
How does Step 3.7 Flash score on benchmarks?
| Benchmark | Score |
|---|---|
| GPQA Diamond | 80.9% |
| HLE | 19.9% |
| SciCode | 40.0% |
| TAU2-bench | 98.5% |
| TerminalBench-Hard | 35.6% |
| IF-Bench | 67.3% |
| LiveCodeBench Reasoning | 63.7% |
| AA Intelligence Index | 42.6 |
Benchmark scores verified .