Name: StepFun: Step 3.7 Flash
Creator: stepfun
Published: 2026-05-28T16:17:49.000Z

Overview

Model specifications

Context: 262,144 tokens
Maximum output: 230,400 tokens
Architecture: text+image+video->text
Tokenizer: Other
Knowledge cutoff: Not provided
Moderated: No

OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input: $0.2
Output: $1.15
Cache read: $0.04

API

Model configuration

Reasoning

Reasoning required: Yes
Default parameters: medium
Capabilities: high, medium, low

API

Quick start

Set OPENROUTER_API_KEY locally. Python requires requests; JavaScript runs in Node.js. Keep the key on the server.

API documentation

curl --fail-with-body https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"stepfun/step-3.7-flash","messages":[{"role":"user","content":"Hello!"}]}'

Capabilities

Input → Output

Input

textimagevideo

Output

text

Reasoning

No · high · medium · low

API

Supported API parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

Available providers

3 providers

Checked: September 7, 2026

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

DeepInfra

Not provided

Context: 262K
Maximum output: 33K
Input: $0.16
Output: $0.92
Cache read: $0.032
Cache write: Not provided

Novita

fp8

Context: 262K
Maximum output: 256K
Input: $0.2
Output: $1.15
Cache read: $0.04
Cache write: Not provided

StepFun

fp8

Context: 256K
Maximum output: 230K
Input: $0.2
Output: $1.15
Cache read: $0.04
Cache write: Not provided

StepFun: Step 3.7 Flash