Step
StepFun · China · Language & multimodal
China Open weightsIndependent test
Showing version: Step 5 Preview · Version lineage ↓
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01
Overview
StepFun's Step series of foundation models spans language, multimodal and audio; recent releases such as Step 3 and the open Step 3.5 Flash focus on reasoning and agentic workloads, served through its developer platform API.
Context length262,144 tokensInput$0.10 USD / 1M tokens
02 / Provenance
Field checks and source notes
When sources disagree on a field, every reading is listed here with its own citation. We do not take a midpoint, invent a missing figure, or decide which side is right — follow the citation and judge for your case.
These field-level notes are recorded verbatim in Chinese in the source data. Open the Chinese version
03 / Plain layer
Plain-language benchmarks
Smartness 28.5 · Fair
Memory 262,144 tokens
Model size Not disclosed
Price / free $0.10 / $0.30 USD / 1M tokens
04
Practical facts
| Context length | 262,144 tokens |
|---|---|
| Max output | Not disclosed |
| Parameters | Not disclosed |
| Input | $0.10 USD / 1M tokens |
| Output price | $0.30 USD / 1M tokens |
| CNY | Not disclosed |
| Free tier | Not disclosed |
| Output speed | Not disclosed |
| Release date | Not disclosed |
| License | Not disclosed |
Show technical data
Technical benchmark table
| Benchmark | Score | Max / unit | Source type | Source | Test date | Conditions |
|---|---|---|---|---|---|---|
| AA Intelligence Index aa-intelligence-index · v5 | 28.5 | score_0_100 / 100 | Independent test | — | ||
| AA Finance & Accounting aa-finance-index · v5 | 40.5 | score_0_100 / 100 | Independent test | — | ||
| AA Strategy & Ops aa-strategy-index · v5 | 44.2 | score_0_100 / 100 | Independent test | — | ||
| AA Legal aa-legal-index · v5 | 38.6 | score_0_100 / 100 | Independent test | — | ||
| AA Economics aa-economics-index · v5 | 38.6 | score_0_100 / 100 | Independent test | — | ||
| AA Engineering aa-engineering-index · v5 | 37 | score_0_100 / 100 | Independent test | — | ||
| AA Healthcare & Medical aa-healthcare-index · v5 | 39.9 | score_0_100 / 100 | Independent test | — |
| Version | Release date | Status | Openness | Parameters | What changed | Detail | |
|---|---|---|---|---|---|---|---|
| Step 5 PreviewShowing version | Active | Open weights | Not disclosed | TBD | Detail | ||
| Step 3.7 Flash | Active | Open weights | Not disclosed | TBD | Detail | ||
| Step 3.5 Flash | Active | Open weights | Not disclosed | TBD | Detail | ||
| Step 3 | Active | Open weights | Not disclosed | TBD | Detail | ||
| Step-Audio | Active | Open weights | Not disclosed | TBD | Detail | ||
| Step-2 | Discontinued | Closed source | Not disclosed | TBD | Detail | ||
| Step-1 | Discontinued | Closed source | Not disclosed | TBD | Detail |
Last updated: · Sources on detail page
06 / Compare