# Step 5 Preview NVFP4

Step 5 Preview NVFP4 is a model from StepFun. Release date unknown. The context window is 1,000,000 tokens. The maximum output is 1,000,000 tokens. Pricing is $1.00 per million input tokens and $2.70 per million output tokens.

- Developer: StepFun
- Id: stepfun/step-5-preview
- Status: API availability
- Canonical: https://alexgetman.com/models/stepfun/step-5-preview/

## Questions

### What is the context window of Step 5 Preview NVFP4?

The context window is 1,000,000 tokens. The maximum output is 1,000,000 tokens.

### How much does Step 5 Preview NVFP4 cost?

Pricing is $1.00 per million input tokens and $2.70 per million output tokens. Cached input is $0.10 per million.

### When was Step 5 Preview NVFP4 released?

Release date unknown

## Evidence links

- [Arena](https://arena.ai)
- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [GitHub · discovery · agent](https://github.com/stepfun-ai/Step-5-Preview)
- [Hugging Face · stepfun-ai](https://huggingface.co/stepfun-ai/Step-5-Preview)
- [Hugging Face · stepfun-ai](https://huggingface.co/stepfun-ai/Step-5-Preview-BF16)
- [huggingface:stepfun-ai](https://huggingface.co/stepfun-ai/Step-5-Preview-NVFP4)
- [models.dev · catalogue](https://models.dev/#Step-5-Preview)
- [models.dev · catalogue](https://models.dev/#step-5-preview)
- [models.dev · catalogue](https://models.dev/#step-5-preview-free)
- [OpenCode · discovery](https://opencode.ai/data/stepfun/step-5-preview)
- [OpenCode Go · models](https://opencode.ai/go)
- [OpenCode Zen · models](https://opencode.ai/zen)
- [OpenRouter · usage](https://openrouter.ai/rankings)
- [openrouter](https://openrouter.ai/stepfun/step-5-preview)
- [Arena · leaderboards](https://stepfun.ai/)
- [Vercel AI Gateway](https://vercel.com/ai-gateway)

## Signals

- [Step 5 Preview Free on OpenCode Zen](https://alexgetman.com/signals/2026/10/08/step-5-preview-free-opencode-zen/)
- [Step 5 Preview NVFP4 spotted on Artificial Analysis](https://alexgetman.com/signals/2026/09/19/stepfun-step-5-preview/)