Step 3.7 Flash API pricing
Official StepFun list price, last checked Oct 29, 2026. Updated Oct 29, 2026.
Step 3.7 Flash costs $0.20 per 1M input tokens and $1.15 per 1M output tokens, cached input at $0.04, per StepFun's official pricing page (checked Oct 29, 2026). It's priced in the middle of the pack: number 14 of 77 by blended price ($0.4375 per 1M tokens at a 3 to 1 input to output mix). LMArena doesn't list it on the boards we track, so we don't rank its quality. For less, look at Mistral Small 4 ($0.2625 blended).
Step 3.7 Flash price per million tokens
| Step 3.7 Flash price per million tokens | USD |
|---|---|
| Input | $0.20 |
| Cached input | $0.04 |
| Output | $1.15 |
| Blended, 3 parts input to 1 part output | $0.4375 |
| Context window | Not listed |
StepFun lists one flat rate for Step 3.7 Flash: no long-prompt surcharge or tier is shown on the pricing page we checked.
What Step 3.7 Flash costs for real work
List-price estimates for a month, no discounts. Our math, not a quote: change the token counts in the plan vs API calculator.
| Workload | Tokens a month | Step 3.7 Flash | DeepSeek V4.1 Flash | Mistral Small 4 |
|---|---|---|---|---|
| Light: a side project or personal assistant | 2M in, 0.5M out | $0.97 | $1.20 | $0.60 |
| Medium: a small team or one product feature | 20M in, 5M out | $9.75 | $12.00 | $6.00 |
| Heavy: a production app | 200M in, 50M out | $97.50 | $120 | $60.00 |
| Medium with 80% of input cached | 20M in (16M cached), 5M out | $7.19 | $7.30 | $3.84 |
How Step 3.7 Flash ranks on LMArena
It isn't on any LMArena board we track as of Oct 29, 2026. We don't estimate quality for unranked models. See the best model for each task for ranked options.
Closest rivals to Step 3.7 Flash
The models nearest in price, other makers first. Ranks are on LMArena, where we have them.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| DeepSeek V4.1 Flash | $0.30 / $1.20 | $0.525 | Step 3.7 Flash wins on price. Compare |
| MiniMax-M3 | $0.30 / $1.20 | $0.525 | Step 3.7 Flash wins on price. Compare |
| MiMo-V2.6 Pro | $0.435 / $0.87 | $0.5437 | Step 3.7 Flash wins on price. Compare |
| Qwen3.6 Flash | $0.25 / $1.50 | $0.5625 | Step 3.7 Flash wins on price. Compare |
Cheaper alternatives to Step 3.7 Flash
At least 40% cheaper blended, cheapest at the bottom of the list we found.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| Mistral Small 4 | $0.15 / $0.60 | $0.2625 | Mistral Small 4 wins on price. Compare |
| MiniMax-M3.1 Flash | $0.15 / $0.60 | $0.2625 | MiniMax-M3.1 Flash wins on price. Compare |
| GLM-5.3 Flash | $0.15 / $0.50 | $0.2375 | GLM-5.3 Flash wins on price. Compare |
More from StepFun
FAQ
How much does the Step 3.7 Flash API cost per million tokens?
$0.20 per 1M input tokens and $1.15 per 1M output tokens, plus $0.04 per 1M for cached input, as of Oct 29, 2026. A typical 3 to 1 input to output mix works out to $0.4375 per 1M tokens.
Does Step 3.7 Flash charge more for long prompts?
No. StepFun lists a single rate on its pricing page.
Is Step 3.7 Flash cheaper than DeepSeek V4.1 Flash?
Yes. A medium month (20M input and 5M output tokens) costs $9.75 on Step 3.7 Flash and $12.00 on DeepSeek V4.1 Flash at list price.
How does Step 3.7 Flash rank on LMArena?
It isn't listed on the LMArena boards we track, so we show no quality rank rather than guess.
What is a cheaper alternative to Step 3.7 Flash?
Mistral Small 4 costs $0.15 in and $0.60 out per 1M tokens, about 1.7x less blended.
Where does this Step 3.7 Flash price come from?
From StepFun's official pricing page, which we check every day. This page was last checked Oct 29, 2026.