What does Step 5 Preview cost?

Step 5 Preview is priced at $2.7 output and $1 input (USD per 1M tokens)

How large is the context window of Step 5 Preview?

Step 5 Preview has a 1M Tokens context window with up to 64K Tokens output.

Where can I access Step 5 Preview?

Official channels: Website and API platform.

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阶跃星辰（StepFun）

Step 5 Preview

AClosed

StepFun's October 2026 preview model with a 1M-token context window, priced at $1.00/$2.70 per million tokens. It hit #2 on OpenRouter's daily token ranking (2.59T) and led the weekly growth ranking at +309%, making it the fastest-rising Chinese model right now.

API Pricing

Input

Output

$2.7

Cached input

$0.05

Peak hours

—

USD / 1M tokens

※ Overseas pricing via OpenRouter (model stepfun/step-5-preview, listed 2026-10-08): $1.00 input (cache hit $0.05) / $2.70 output per 1M tokens. StepFun publishes no overseas USD price list (there is no English pricing page). Mainland-China pricing (¥7/¥20) is shown on the Chinese page

Price sourceopenrouter.ai ↗· verified 2026-10-11

Latest change：Down 50% vs previous（$7.5 → $3.75 / 1M）

Price history

7 snapshots · 2026-07-25 → 2026-08-17

Current: $3.75Period low: $3.75 (2026-08-17)Period high: $7.5 (2026-07-25)First tracked: $7.5 (2026-07-25)

Specifications

Context window: 1M Tokens
Max output: 64K Tokens
License: Closed

Overall score

Total

62.9

Rank

Tier

Data confidence

85%

Capability76

Scale35

Value70

Context48

Ecosystem21

Freshness94.4

Capabilities & use cases

Best for

长上下文推理
国产模型替代
多模态应用探索
Agent 长程任务

Official links

Website ↗API platform ↗Pricing page ↗Open in comparator ↗

FAQ

What does Step 5 Preview cost?: Step 5 Preview is priced at $2.7 output and $1 input (USD per 1M tokens)
How large is the context window of Step 5 Preview?: Step 5 Preview has a 1M Tokens context window with up to 64K Tokens output.
Where can I access Step 5 Preview?: Official channels: Website and API platform.

Data is refreshed daily and cross-checked against two independent sources; please confirm pricing and specs on the vendor page.