Yi
01.AI · China · Language & multimodal
China Closed source
Showing version: Yi-Lightning · 2024-10-16 · Version lineage ↓
Website ↗ API ↗ Docs ↗ Open weights · github ↗Open weights · huggingface ↗Open weights · huggingface ↗
01
Overview
01.AI's Yi model family follows a dual open/closed track: open-weight Yi-34B, Yi-1.5 and the Yi-Coder code models, plus the closed 100B-scale Yi-Large and the MoE flagship Yi-Lightning. After 2025 the company pivoted to enterprise AI and announced a wind-down of the hosted Yi API.
Context length16,000 tokensRelease date2024-10-16
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
Writing 1287 · Human preference2024-10-16 首次上榜，总体第 6 名，与 Grok-2-08-13 并列
Memory 16,000 tokens
Model size Not disclosed
Price / free Not disclosed
04
Practical facts
| Context length | 16,000 tokens |
|---|---|
| Max output | Not disclosed |
| Parameters | Not disclosed |
| Input | Not disclosed |
| Output price | Not disclosed |
| CNY | Input CNY 0.99 per 1M tokens; output CNY 0.99 per 1M tokens (CNY list prices, per the vendor's official pricing page). |
| Free tier | Not disclosed |
| Output speed | Not disclosed |
| Release date | |
| License | Not disclosed |
Show technical data
Technical benchmark table
| Benchmark | Score | Max / unit | Source type | Source | Test date | Conditions |
|---|---|---|---|---|---|---|
| LMArena text preference lmarena-text | 1287 | elo_like | Human preference | 2024-10-16 首次上榜，总体第 6 名，与 Grok-2-08-13 并列 |
| Version | Release date | Status | Openness | Parameters | What changed | Detail | |
|---|---|---|---|---|---|---|---|
| Yi-Coder | Active | Open weights | Not disclosed | TBD | Detail | ||
| Yi-Large | Active | Closed source | Not disclosed | TBD | Detail | ||
| Yi-34B | Active | Open weights | Not disclosed | TBD | Detail | ||
| Yi-LightningShowing version | Discontinued | Closed source | Not disclosed | TBD | Detail |
Last updated: · Sources on detail page
06 / Compare