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Step 3.7 Flash: price, performance and context
Open Step 3.7 Flash by StepFun costs $0.20 per 1M input and $1.15 per 1M output tokens, handles up to 262.1K tokens in one request (≈ 790 pages of text) and scores 19.5 points on the AgentKernel performance index, rank 99 of 212.
Privacy: zero data retention with one provider, not in the EU. Availability over the last 24 h: 99.9%.
Open in the interactive comparisonKey facts
- Licence
- Open weights: free to download and self-host
- Input / 1M tokens
- $0.20
- Output / 1M tokens
- $1.15
- Context window
- 262.1K tokens
- Max. output
- 230.4K tokens
- Performance index
- 19.5 points · rank 99 of 212
- Coding index
- 39.6 points · rank 74 of 119
- Agentic index
- n/a
- Cost at your usage
- $0.488 / month
- Knowledge cutoff
- n/a
- In the catalog since
- May 28, 2026
- Capabilities
- Reasoning, Vision, Tool Calling
What do you get for $10.00?
Rules of thumb from the cost calculator, base rates without caching or taxes.
| Task | Cost per task | For $10.00 |
|---|---|---|
| Chat repliesA question with a short history, a detailed answer | $0.001 | 16,000 |
| Email draftsBullet points in, a finished email out | $0.001 | 20,000 |
| Document summariesRead 10 pages, write a one-page summary | $0.001 | 8,100 |
| Code reviewsReview and comment on 500 lines of code | $0.002 | 4,400 |
| Book analysesAnalyse a 300-page book in one go | $0.022 | 450 |
Cheaper with similar performance
| Model | Licence | Performance | Your cost / month |
|---|---|---|---|
| Ling 3.1 FlashinclusionAI | Proprietary | 41.1 | $0.00 |
| Ling 3.0 Flash VLinclusionAI | Open | 24.6 | $0.036 |
| Ling 3.0 FlashinclusionAI | Open | 20.1 | $0.037 |
Stronger models
| Model | Licence | Performance | Your cost / month |
|---|---|---|---|
| Ling 3.0 FlashinclusionAI | Open | 20.1 | $0.037 |
| o3OpenAI | Proprietary | 20.2 | $4.00 |
| GPT-5.1-Codex-MiniOpenAI | Proprietary | 20.4 | $0.75 |