Step 5 Preview vs Gemini 3.8 Flash
75.8 overall · $1.50 / 1M
// stepfun
Step 5 Preview
stepfun/step-5-preview
Step 5 Preview costs $1.00 per 1M input tokens and $2.70 per 1M output tokens with a 1M-token context window.
A reasoning, tool-calling model from stepfun, released Oct 8, 2026. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.
- Input / 1M
- $1.00
- Output / 1M
- $2.70
- Context
- 1M
- LiveBench overall
- Not evaluated
Specs and pricing
| Input price USD per 1M prompt tokens | $1.00 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $2.70 |
| Blended price 3:1 input:output — #121 most expensive of 358 listed models | $1.43 |
| Cached input read Blank means not priced separately — not free | $0.050 |
| Cache write | — |
| Context window | 1,000,000 tokens |
| Max output | 64,000 tokens |
| Input modalities | text, image, video |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Oct 8, 2026 |
What Step 5 Preview costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $387.60/mo |
| RAG assistant 8K in / 600 out × 100K requests | $582.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $484.00/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $1,155/mo |
| Bulk classification 500 in / 20 out × 5M requests | $2,295/mo |
Compare Step 5 Preview with
Benchmarked models at a similar price.
Step 5 Preview vs Gemini 3.7 Flash
78.8 overall · $1.50 / 1M
Step 5 Preview vs Gemini 3.6 Flash
73.6 overall · $1.50 / 1M
moonshotai
Step 5 Preview vs Kimi K2.7 Code
68.4 overall · $1.34 / 1M
x-ai
Step 5 Preview vs SpaceXAI: Grok 4.3
62.2 overall · $1.56 / 1M
x-ai
Step 5 Preview vs SpaceXAI: Grok Build 0.1
67.8 overall · $1.25 / 1M
Step 5 Preview FAQ
How much does Step 5 Preview cost?
Step 5 Preview lists at $1.00 per 1M input tokens and $2.70 per 1M output tokens, with cached input reads at $0.050 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $582.00 at list price.
What is the context window of Step 5 Preview?
Step 5 Preview accepts up to 1,000,000 tokens of context and can return up to 64,000 output tokens per response.
Does Step 5 Preview support tool calling?
Yes — Step 5 Preview supports tool (function) calling and exposes extended reasoning. It accepts text, image, video input.
How does Step 5 Preview score on benchmarks?
LiveBench has not published a run for Step 5 Preview yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.
What is the API model ID for Step 5 Preview?
On OpenRouter the model ID is "stepfun/step-5-preview". It was listed on Oct 8, 2026.
More from stepfun
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.