step-3
Model overview
step-3
Step-3 is a multimodal reasoning model.
general LLMreasoningmultimodalvision-languagechatdocument understandingenterprise access
Representative version
step-3
| Company | StepFun |
|---|---|
| Release | Not disclosed |
| Release type | Model release |
| Parameters | Not disclosed |
| Architecture | Not disclosed |
| Context | 64,000 |
| Input modalities | text / image |
| Output modalities | text |
| Tool use / function calling | Tool use: Not disclosed; Function calling: Not disclosed |
| Structured output / reasoning | Confirmed: Reasoning |
| Vision / audio / video | Confirmed: Vision |
| Open weights / License | Weight status not disclosed / license not disclosed stepfun-step-3-phase-3-5 · License source pending verification |
| Vendor API | Not disclosed API source pending verification |
| OpenRouter | Needs confirmation |
| Pricing | OpenRouter candidate (needs confirmation) · 2026-08-11: $0.1 / $0.3 input / output, per 1M tokens |
| Benchmark | LMArena 2 rows |
| Public signals | No reliable public source |
| Use cases | assistant chat / document understanding / enterprise API / general text tasks |
| Claim evidence | Release event / Model specificationsStepFun model capability overviewstep-3 · step-3 · step-3 |
OpenRouter
Pricing / context / availability
| OpenRouter | Needs confirmation |
|---|---|
| OpenRouter listing | stepfun/step-3.5-flash |
| Mapped version | step-3 stepfun-step-3-phase-3-5 |
| Pricing | OpenRouter candidate (needs confirmation) · 2026-08-11: $0.1 / $0.3 input / output, per 1M tokens |
| Context | 262144 |
| Speed/Latency | No reliable public source |
| Snapshot time | 2026-08-11T06:28:09.895Z |
| Source | View source |
Benchmark
Ranking evidence
| Source | Task | Rank | Score | Sample | Time | Link |
|---|---|---|---|---|---|---|
| LMArena | Coding | 152 | 1,407.12 | 1,234 | 2026-05-07 | View source |
| LMArena | Text overall | 165 | 1,347.94 | 6,551 | 2026-05-07 | View source |
Verified limitations
Usage boundaries
- No verified usage, ranking, call-volume, token-consumption, heat, download, or OpenRouter metric is populated.
Missing public information
Public information not yet available
Parameter scale not disclosedRelease date not disclosedNot listed on OpenRouterNo public model-card activity countersNo linkable model-specific reviewSpeed/latency not disclosed