01.AIYi Lightning
Yi Lightning is a 01.AI proprietary model. Its best configuration ranks #475 of 785 on the BenchLeader Index at 46.8 ±7.1, in the lower half. The ± is the point: 424 other configurations score within that range, so they and this one cannot be told apart on quality alone — price and speed are what separate them. It scores highest in human preference (49) and lowest in coding (35). Last measured 22 Oct 2026.
- Blended price
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- Output speed
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- First answer
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- Context
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- Full answer
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- Cost per run
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- Released
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- date not published by our sources
- Overall index47
- Reasoning49
- Coding35
- Maths47
- Human preference49
How its index has moved
19 Sept 2026 to 21 Oct 2026The index is recomputed from scratch every day, so a line moves when a new benchmark result lands, when a publisher revises a score, or when the models it is normalised against change. Early movement usually means the score is still settling.
Benchmark results
See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.
Reasoning
| Benchmark | not stated | Source | Trend |
|---|---|---|---|
| Arena Hard Prompts | 1341#222 | Arena (LMArena) |
Coding
| Benchmark | not stated | Source | Trend |
|---|---|---|---|
| Arena Coding | 1368#224 | Arena (LMArena) | |
| Aider Polyglot | 12.9%#43 | Aider polyglot leaderboard |
Maths
| Benchmark | not stated | Source | Trend |
|---|---|---|---|
| Arena Maths | 1304#225 | Arena (LMArena) |
Instruction following
| Benchmark | not stated | Source | Trend |
|---|---|---|---|
| Arena Instruction Followingnot in index | 1308#230 | Arena (LMArena) |
Human preference
| Benchmark | not stated | Source | Trend |
|---|---|---|---|
| Arena Text | 1328#224 | Arena (LMArena) | |
| Arena Creative Writingnot in index | 1297#220 | Arena (LMArena) | |
| Arena Multi-turnnot in index | 1330#210 | Arena (LMArena) | |
| Arena Longer Queriesnot in index | 1325#235 | Arena (LMArena) |
More from 01.AI
See also
Questions people ask
- What are Yi Lightning's benchmark scores?
- As of 25 Oct 2026, Yi Lightning scores 46.8 ±7.1 on the BenchLeader Index, strongest in human preference (49) and weakest in coding (35). That rests on 5 independent benchmark results, and every score on this page links to its publisher.
- How does Yi Lightning rank?
- Yi Lightning is #475 of 785 ranked configurations on 25 Oct 2026. 424 other configurations score within its margin, so the exact position matters less than the band. The leader is Claude Opus 5.5 (max effort) at 72.6.
Data as of 25 Oct 2026. Compare with another model.
Cite as: BenchLeader, “Yi Lightning: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/yi-lightning.