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StepFun: Step 3.7 Flash pricing

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B… StepFun: Step 3.7 Flash from OpenRouter costs $0.200 per 1M input tokens and $1.15 per 1M output tokens. Cached input is $0.040 per 1M. Context window 262,144 tokens.

API id stepfun/step-3.7-flash · OpenRouter · source · updated 2026-09-25 · general-purpose

$0.200
Input / 1M tokens
$1.15
Output / 1M tokens
$0.040
Cached input / 1M
262K
Context window

StepFun: Step 3.7 Flash specifications

Provider
OpenRouter
API id
stepfun/step-3.7-flash
Model type
general-purpose
Context window
262K tokens
Max output
230K tokens
Currency
USD
Price source
Provider API
Last checked
2026-09-25

Tags

  • fast
  • vision

What StepFun: Step 3.7 Flash costs in practice

Estimated cost at common usage volumes
WorkloadInput tokensOutput tokensEstimated cost
Short chat turn1,000500$0.0008
Document summary50,0002,000$0.01
1M tokens in, 200K out1,000,000200,000$0.43

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

Common questions

How much does StepFun: Step 3.7 Flash cost per 1M tokens?
StepFun: Step 3.7 Flash costs $0.200 per 1M input tokens and $1.15 per 1M output tokens on the standard tier. Cached input is $0.040 per 1M.
What is StepFun: Step 3.7 Flash's context window?
StepFun: Step 3.7 Flash accepts up to 262,144 tokens in a single request, and can return up to 230,400 output tokens.
Is there a cheaper OpenRouter model than StepFun: Step 3.7 Flash?
Yes. MythoMax 13B is $0.080 per 1M input tokens versus $0.200 for StepFun: Step 3.7 Flash, with a 8,192 token context window.
Where does this StepFun: Step 3.7 Flash price come from?
From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Head-to-head comparisons

Other OpenRouter models

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