Model comparison
GPT-5.5 Pro vs Yi-Lightning
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 36.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 33.5.
Side by side
| GPT-5.5 Pro | Yi-Lightning | |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 64.3 | 36.5 |
| Released | 2026-04-23 | 2024-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 18 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Yi-Lightning: 27.0 (#315)
| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| Aider Polyglot | — | 12.9% |
| LMArena Coding | — | 1313 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.6 (#7), Yi-Lightning: 24.9 (#137)
| 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 | 162.45 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 83.8 (#8), Yi-Lightning: 33.5 (#173)
| 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 leads
GPT-5.5 Pro: 64.2 (#17), Yi-Lightning: 34.8 (#182)
| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1286 |
Multilingual Not comparable
GPT-5.5 Pro: —, Yi-Lightning: 42.4 (#191)
| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Non-English | — | 1269 |
| LMArena Chinese | — | 1320 |
| LMArena French | — | 1304 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Russian | — | 1255 |
| LMArena Spanish | — | 1315 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Yi-Lightning: 67.6 (#191)
| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1278 |
Long Context Not comparable
GPT-5.5 Pro: —, Yi-Lightning: 39.4 (#176)
| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | — | 1297 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Yi-Lightning: 50.4 (#178)
| Benchmark | GPT-5.5 Pro | Yi-Lightning |
|---|---|---|
| LMArena Text | — | 1302 |
| LMArena Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1311 |
Frequently asked questions
Is GPT-5.5 Pro better than Yi-Lightning?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 36.5 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.