LLM
Preview
Proprietary
Step-4
Long-context Chinese multimodal reasoning
Release2026-09
Context1M
Max output—
ParametersUndisclosed
Local / VRAMAPI only
LicenseProprietary
Overview
Step-4 is a model in the LLM category from StepFun. It was released in 2026-09. The vendor is based in China. Best for: Long-context Chinese multimodal reasoning.
Notes: Low confidence: based only on secondary/rumor sources; pricing, access, and technical values are unverified.
Strengths
- 1M context
- Vision input
Limits
- Preview
- Small ecosystem
Specifications
| Vendor | StepFun |
|---|---|
| Category | LLM |
| Release | 2026-09 |
| Status | Preview |
| License | Proprietary |
| Commercial use | Not specified |
| Context window | 1M |
| Input modalities | Text, Image |
| Output modalities | Text |
| Prompt types | Text |
| Negative prompts | No |
| Max outputs | 1 |
| Local deployment | No |
| API access | Yes |
| Pricing | Token-based API |
| Confidence | Low |
| Vendor country | China |
| Vendor type | Open lab |
Pricing & hardware
Token-based API
API-only: local GPU memory is not applicable. API access is available.