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StepFun: Step 5 Preview

🇨🇳 StepFun · Step 5

Input Price $1.00 per million tokens NT$32.0
Output Price $2.70 per million tokens NT$86.4
Context Window 1M tokens Output limit: 64K
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Overview

StepFun: Step 5 Preview is a large language model API from StepFun, part of its Step 5 model family. Priced at $1.00 per million input tokens and $2.70 per million output tokens, it occupies the mid-range, balancing capability against running cost. Output tokens cost about 3× as much as input, so prompt-heavy workloads run noticeably cheaper than generation-heavy ones. An exceptionally large 1M-token context window (≈1,500 pages of text) means entire repositories or document collections can be processed without chunking. 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 44 (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 $1.00 NT$32.0
Output per 1M tokens $2.70 NT$86.4
Cached Input per 1M tokens $0.050 NT$1.6

Provider
階躍星辰 (StepFun)
Model Family
Step 5
Version String
stepfun/step-5-preview
Status
Active
Modality
Text, Image, Video
Context Window
1,000,000 tokens
Output Limit
64,000 tokens

Index Metrics

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

Intelligence Index 44 B Measured: 2026-10-14

Benchmark Scores

Data source: Artificial Analysis

AA-LCR 88.3% S Measured: 2026-10-14
HLE 46.5% S Measured: 2026-10-14
MMMU Pro 76.4% A Measured: 2026-10-14
Non-Hallucination 57.0% Measured: 2026-10-14
Omniscience Accuracy 41.5% Measured: 2026-10-14
SciCode 58.9% A Measured: 2026-10-14

Performance Metrics

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

First Token Latency 2.7s Measured: 2026-10-14
Output Speed 89 t/s Measured: 2026-10-14
Response Time 30.8s Measured: 2026-10-14

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 $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter
Cached Input $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter
Cached Input $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter
Cached Input $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter
Cached Input $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter
Cached Input $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter
Cached Input $0.050 OpenRouter
Output $2.70 OpenRouter
Input $1.00 OpenRouter

Key Insights

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

  • StepFun: Step 5 Preview Input price: $1/M tokens
  • StepFun: Step 5 Preview Output price: $2.7/M tokens
  • Context window: 1,000,000 tokens
  • Provider: StepFun
  • Model family: Step 5
  • Modalities: Text, Image, Video
  • Data source: OpenRouter, updated daily