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StepFun: Step 3.7 Flash

🇨🇳 StepFun · Step 3.7

Input Price $0.200 per million tokens NT$6.4
Output Price $1.15 per million tokens NT$36.8
Context Window 256K tokens Output limit: 256K
OpenRouter Route Price Please verify with official pricing pages
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Overview

StepFun: Step 3.7 Flash is a large language model API from StepFun, part of its Step 3.7 model family. Priced at $0.200 per million input tokens and $1.15 per million output tokens, it occupies the mid-range, balancing capability against running cost. Output tokens cost about 6× as much as input, so prompt-heavy workloads run noticeably cheaper than generation-heavy ones. A large 256K-token context window (≈384 pages of text) lets it take in whole books, large codebases, or lengthy transcripts in a single call. Beyond plain text it also accepts Image, Video input, so it can be applied to multimodal tasks rather than text alone. On Artificial Analysis's Intelligence Index it scores 43 (B grade), a useful proxy for its general reasoning strength relative to the other models tracked here. All prices on this page reflect OpenRouter's routed rates and are re-synced automatically every day; confirm against the provider's official pricing before committing to production.

Dimension Unit Price (USD) Price (TWD) Effective From
Input per 1M tokens $0.200 NT$6.4
Output per 1M tokens $1.15 NT$36.8
Cached Input per 1M tokens $0.040 NT$1.3

Provider
階躍星辰 (StepFun)
Model Family
Step 3.7
Version String
stepfun/step-3.7-flash
Status
Active
Modality
Text, Image, Video
Context Window
256,000 tokens
Output Limit
256,000 tokens

Index Metrics

Cross-domain capability indexes evaluated by Artificial Analysis — Artificial Analysis

Agentic Index 60 S Measured: 2026-06-08
Coding Index 37 B Measured: 2026-06-08
Intelligence Index 43 B Measured: 2026-06-08

Benchmark Scores

Data source: Artificial Analysis

AA-LCR 63.7% B Measured: 2026-06-08
GPQA Diamond 80.9% A Measured: 2026-06-08
HLE 19.9% B Measured: 2026-06-08
IFBench 67.3% B Measured: 2026-06-08
MMMU Pro 75.3% A Measured: 2026-06-08
Non-Hallucination 15.6% Measured: 2026-06-08
Omniscience Accuracy 25.4% Measured: 2026-06-08
SciCode 40.1% B Measured: 2026-06-08
Tau2 98.5% Measured: 2026-06-08
TerminalBench 35.6% Measured: 2026-06-08

Performance Metrics

Real-world benchmarks, updated every 72 hours by Artificial Analysis — Artificial Analysis

First Token Latency 1.3s Measured: 2026-06-08
Output Speed 116 t/s Measured: 2026-06-08
Response Time 22.8s Measured: 2026-06-08

90-Day Price Trend

Input / Output price (USD per 1M tokens)

Past 90 days of records; every price change is shown here

Date Dimension Price (USD) Source
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter
Cached Input $0.040 OpenRouter
Output $1.15 OpenRouter
Input $0.200 OpenRouter

Key Insights

Key data points from this page for quick reference and citation.

  • StepFun: Step 3.7 Flash Input price: $0.2/M tokens
  • StepFun: Step 3.7 Flash Output price: $1.15/M tokens
  • Context window: 256,000 tokens
  • Provider: StepFun
  • Model family: Step 3.7
  • Modalities: Text, Image, Video
  • Data source: OpenRouter, updated daily