Step 5 Preview
stepfun/step-5-preview出品方： StepFun · 發布 2026-09-16
Prices in USD per 1M tokens. Unknown means the provider does not publish per-token pricing.
能力清單
Model fit scores
0–100 · higher is betterThese scores reward declared capabilities, context size, price and provider availability — they are not benchmark results. Use them as a directional signal alongside your own evaluation.
Coding93
- Tool calling40/40
- Structured output20/20
- Reasoning10/10
- Context window (100K → 1M)20/20
- Provider availability3/10
Agents93
- Tool calling35/35
- Structured output25/25
- Reasoning15/15
- Output token limit15/15
- Provider availability3/10
JSON / structured output83
- Structured output / JSON mode50/50
- Tool calling20/20
- Temperature control0/10
- Price-friendly for high-volume13/20
Cost efficiency53
- Headline price (log-scaled)48/95
- Has prompt-cache pricing5/5
Long context90
- Context window (100K → 2M)80/90
- Has published price for full window10/10
Vision93
- Accepts image input50/50
- Context window (10K → 1M)30/30
- Has published price10/10
- Provider availability3/10
Production-readiness73
- Number of independent providers15/40
- Has published per-token price20/20
- Context window ≥ 8K15/15
- No data inconsistencies across providers8/10
- Official model (not derivative)15/15
Cost Efficiency Index
Open full calculator →Estimated cost using the recommended provider's headline rate. Each scenario fixes average input/output tokens — the assumptions are shown in the third column.
| Scenario | Cost | Assumption |
|---|---|---|
RAG answer per 1,000 RAG answers | $6.17 < $0.01 per request | 5K input tokens (query + 4 retrieved chunks of ~1K each) and a 500-token answer. Typical SaaS knowledge-base bot. |
Support ticket triage per 10,000 tickets | $12.33 < $0.01 per request | 1K input tokens (ticket body + system prompt) and a 100-token JSON classification reply. High-volume customer support. |
Data extraction per 1,000 documents | $3.29 < $0.01 per request | 2K input tokens (a single document page) and a 500-token JSON extraction. ETL / invoice / form pipelines. |
Code review per 1,000 PRs | $10.41 $0.01 per request | 8K input tokens (diff + surrounding files) and a 1K-token review comment. PR-bot workloads. |
Agent step per 1,000 steps | $13.15 $0.01 per request | 12K input tokens (long-running tool history) and a 600-token tool-call decision. Cost per agent step. |
定價詳情
推薦定價來自 stepfun · step-5-preview
於 3 家供應商可用
| 服務商 | 服務商模型 ID | 輸入 / 1M | 輸出 / 1M | 上下文 | 發布日期 |
|---|---|---|---|---|---|
| StepFun (China) stepfun | step-5-preview | $0.959 | $2.74 | 1M | 2026-09-16 |
| Vercel AI Gateway vercel | stepfun/step-5-preview | $1.00 | $2.70 | 1M | 2026-09-16 |
| NanoGPT nano-gpt | stepfun/step-5-preview | $1.00 | $2.70 | 1M | 2026-09-16 |
各渠道資料存在不一致
- modalities varies across offerings
各服務商對此模型的回報值不一致。上方「核心數據」採用代表性服務商的值；逐項請以下表為準。
Frequently asked questions
How much does Step 5 Preview cost?
Step 5 Preview costs $0.959 per 1M input tokens and $2.74 per 1M output tokens, sourced from stepfun. Cache reads, audio tokens and >200K-context tiers (where applicable) are listed in the Pricing detail block above.
What is the context window of Step 5 Preview?
Step 5 Preview has a context window of 1M tokens, with a max output of 66K tokens per reply. This is the total combined size of prompt + completion.
Does Step 5 Preview support tool calling?
Yes. Step 5 Preview supports tool calling (function calling). This makes it suitable for production agent and automation workloads where the model has to invoke external functions reliably.
Does Step 5 Preview support structured output / JSON mode?
Yes. Step 5 Preview supports structured output / JSON-schema-constrained decoding. This makes it suitable for production agent and automation workloads where the model has to invoke external functions reliably.
Can Step 5 Preview accept image input?
Yes. Step 5 Preview accepts both text and image input. Vision pricing per image is usually billed on top of the regular token rate — check StepFun's docs for the exact rule.
Is Step 5 Preview open-weight?
No. Step 5 Preview is a proprietary model — only StepFun (and any approved hosting partners) can serve it. The pricing above reflects the cheapest API access.
What are the best alternatives to Step 5 Preview?
If Step 5 Preview doesn't fit, consider Step 3.5 Flash, Step 3.7 Flash, Step 3.5 Flash 2603. Each one targets the same use case — see the Related links below for direct head-to-head pages.
Where does this data come from?
All numbers are normalised into a single canonical model record and reconciled with each provider's official documentation. We re-pull daily and write any changes (price, context, capability) to the /changelog page.
Explore more
More StepFun models
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- Step 3.7 Flash$0.18 in / $1.11 out
- Step 3.5 Flash 2603$0.10 in / $0.30 out
- Step 1 (32K)$2.05 in / $9.59 out
- Step TTS 2Unknown pricing
Capability lists this model is in
最近更新：
Pricing and capabilities are refreshed daily and reconciled against each provider's official documentation. Always verify critical production decisions with the provider directly.