# GPT-5.5 Pro vs Yi-Lightning

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 37.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-pro-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 36.2.

## Snapshot

| | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 64.3 | 37.1 |
| Rank | 8 | 209 |
| Context | 1.05M | — |
| Input $/M | $30 | — |
| Output $/M | $180 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.5 Pro: —
- Yi-Lightning: 27.4 (#320)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| Aider Polyglot | — | 12.9% |
| LMArena Coding | — | 1312 |

## Reasoning

- GPT-5.5 Pro: 73.3 (#10)
- Yi-Lightning: 25.9 (#139)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1302 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.07 | — |

## Math

- GPT-5.5 Pro: 84.0 (#10)
- Yi-Lightning: 36.2 (#172)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1300 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |

## Knowledge

- GPT-5.5 Pro: 64.1 (#19)
- Yi-Lightning: 35.4 (#185)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1286 |

## Multilingual

- GPT-5.5 Pro: —
- Yi-Lightning: 42.2 (#196)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Non-English | — | 1269 |
| LMArena Chinese | — | 1320 |
| LMArena French | — | 1305 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Russian | — | 1255 |
| LMArena Spanish | — | 1315 |

## Instruction Following

- GPT-5.5 Pro: —
- Yi-Lightning: 67.4 (#196)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1278 |

## Long Context

- GPT-5.5 Pro: —
- Yi-Lightning: 39.4 (#181)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | — | 1297 |

## Writing & Preference

- GPT-5.5 Pro: —
- Yi-Lightning: 50.2 (#184)

| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Text | — | 1302 |
| LMArena Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1311 |

## FAQ

### Is GPT-5.5 Pro better than Yi-Lightning?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 37.1 on the Noometry Index.

### How many benchmarks do GPT-5.5 Pro and Yi-Lightning share?

0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Yi-Lightning has 18.