Step 5 Preview API
- Input
- $1per 1M tokens
- Output
- $2.7per 1M tokens
- Cached input
- $0.1per 1M tokens
- Context
- 1M
Step 5 Preview for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.
Explore Step 5 Preview for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses through the unified API. Supported interfaces and current availability are shown below.
- OpenAI-style Chat Completions
- Anthropic-style Messages
- OpenAI-style Responses
Model details
- Context window
- 1M tokens
- Max output
- 66K tokens
- Input
- Text, images
- Output
- Text
- Capabilities
- Reasoning, Vision, Tool calling, Streaming, JSON output
- Interfaces
- OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses
Step 5 Preview API pricing
Per 1M tokens. The Inferray price is what you are charged — no gateway fee is added on top of it.
| Metric | Price |
|---|---|
| Input | $1 |
| Cached input | $0.1 |
| Output | $2.7 |
What Step 5 Preview costs for real work
Typical workloads at list price, worked out from the rates above. Nothing is added on top.
| Workload | Tokens | Cost |
|---|---|---|
| 1,000 chat replies | 1,500 tokens in, 400 out, each | $2.58 |
| Summarise a 100-page document | 60K tokens in, 2K out | $0.065 |
| 10M tokens of coding-agent work | 10M tokens: 85% cached input, 12% fresh input, 3% output | $2.86 |
| 1M output tokens | Generated text only | $2.70 |
Step 5 Preview is pay-as-you-go only
Step 5 Preview is not included in Token Plans. Call it from a pay-as-you-go balance at the list price above, with no gateway fee.
Why teams pick it
- Step 5 Preview for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.
API availability
Availability for this model has not yet been verified. You can compare its features and pricing; request examples will appear once availability is confirmed.
Availability not yet verified
Availability not yet verified
Availability not yet verified
Use Step 5 Preview in your tools
Every coding agent below has a setup guide. Set the model to step-5-preview.
More from Stepfun
Alternatives to Step 5 Preview
- Gemini 3.8 FlashFast multimodal reasoning for coding and agents.Google
- Kimi K2Kimi K2 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Moonshot AI
- Qwen3.5 397B A17BQwen3.5 397B A17B for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Alibaba
Questions about this model
- How much does the Step 5 Preview API cost?
- Step 5 Preview costs $1 per 1M input tokens and $2.7 per 1M output tokens on Inferray, and cached input is $0.1 per 1M. That is the list price, with no gateway fee on top.
- Is there a free tier for Step 5 Preview?
- No. You add credit and pay Step 5 Preview's list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.
- Am I charged for failed requests?
- No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.
- Is Step 5 Preview included in Token Plans?
- No. Step 5 Preview is pay-as-you-go only; Token Plans cover the other text models in the catalog.
- Can I use Step 5 Preview in Claude Code?
- Yes. Set ANTHROPIC_BASE_URL to https://api.inferray.com, ANTHROPIC_AUTH_TOKEN to your Inferray key, and ANTHROPIC_MODEL to step-5-preview. The same key works in Codex, opencode, Cline, and other agents.
- Does Step 5 Preview support tool calling and vision?
- Step 5 Preview supports tool calling, image input, reasoning, JSON output and streaming on Inferray.
- Is it the real Step 5 Preview?
- Yes. A request for step-5-preview is answered by Step 5 Preview from Stepfun, billed at its published list price. Inferray never substitutes a different or smaller model.
Prices from the catalog as of November 12, 2026.