openai
Step 3.7 Flash vs GPT-5.6 Luna
73.6 overall · $0.450 / 1M
// stepfun
Step 3.7 Flash
stepfun/step-3.7-flash
reasoningtool callingimage inputvideo inputprompt caching
Step 3.7 Flash costs $0.200 per 1M input tokens and $1.15 per 1M output tokens with a 262K-token context window.
A reasoning, tool-calling model from stepfun, released May 28, 2026. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.
- Input / 1M
- $0.200
- Output / 1M
- $1.15
- Context
- 262K
- LiveBench overall
- Not evaluated
Specs and pricing
| Input price USD per 1M prompt tokens | $0.200 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $1.15 |
| Blended price 3:1 input:output — #126 cheapest of 343 listed models | $0.438 |
| Cached input read Blank means not priced separately — not free | $0.040 |
| Cache write | — |
| Context window | 262,144 tokens |
| Max output | 230,400 tokens |
| Input modalities | text, image, video |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | May 28, 2026 |
What Step 3.7 Flash costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $128.48/mo |
| RAG assistant 8K in / 600 out × 100K requests | $165.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $162.40/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $278.25/mo |
| Bulk classification 500 in / 20 out × 5M requests | $535.00/mo |
Compare Step 3.7 Flash with
Benchmarked models at a similar price.
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Step 3.7 Flash vs GPT-5.4 Nano
69.6 overall · $0.463 / 1M
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Step 3.7 Flash vs MiniMax M3
67.3 overall · $0.525 / 1M
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Step 3.7 Flash vs DeepSeek V4 Flash Vision Exp
76.8 overall · $0.330 / 1M
qwen
Step 3.7 Flash vs Qwen3.6 Plus
68.9 overall · $0.731 / 1M
z-ai
Step 3.7 Flash vs GLM 5.3 Flash
71.6 overall · $0.237 / 1M
Step 3.7 Flash FAQ
How much does Step 3.7 Flash cost?
Step 3.7 Flash lists at $0.200 per 1M input tokens and $1.15 per 1M output tokens, with cached input reads at $0.040 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $165.00 at list price.
What is the context window of Step 3.7 Flash?
Step 3.7 Flash accepts up to 262,144 tokens of context and can return up to 230,400 output tokens per response.
Does Step 3.7 Flash support tool calling?
Yes — Step 3.7 Flash supports tool (function) calling and exposes extended reasoning. It accepts text, image, video input.
How does Step 3.7 Flash score on benchmarks?
LiveBench has not published a run for Step 3.7 Flash yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.
What is the API model ID for Step 3.7 Flash?
On OpenRouter the model ID is "stepfun/step-3.7-flash". It was listed on May 28, 2026.
More from stepfun
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.