# GPT-5.5 Pro vs Yi-34B

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 27.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-pro-vs-yi-34b
- Last updated: 2026-10-11
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Yi-34B in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 21.6.
- The biggest single-benchmark swing is GPQA Diamond: 93.9% for GPT-5.5 Pro and 14.7% for Yi-34B.
- Yi-34B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 64.3 | 27.8 |
| Rank | 8 | 329 |
| Context | 1.05M | — |
| Input $/M | $30 | — |
| Output $/M | $180 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Pro: —
- Yi-34B: 32.3 (#274)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| LMArena Coding | — | 1112 |

## Reasoning

- GPT-5.5 Pro: 73.3 (#10)
- Yi-34B: 21.2 (#226)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| Epoch Capabilities Index | 162.07 | 117.39 |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1104 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| BIG-Bench Hard | — | 71.7% |

## Math

- GPT-5.5 Pro: 84.0 (#10)
- Yi-34B: 21.6 (#282)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1114 |
| MATH Level 5 | — | 5.1% |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
| GSM8K | — | 76% |

## Knowledge

- GPT-5.5 Pro: 64.1 (#19)
- Yi-34B: 7.5 (#309)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| GPQA Diamond | 93.9% | 14.7% |
| LMArena Expert | — | 1061 |
| MMLU | — | 76.3% |

## Multilingual

- GPT-5.5 Pro: —
- Yi-34B: 29.7 (#264)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| LMArena Non-English | — | 1079 |
| LMArena Chinese | — | 1176 |
| LMArena French | — | 1081 |
| LMArena German | — | 1042 |
| LMArena Japanese | — | 993 |
| LMArena Korean | — | 959 |
| LMArena Russian | — | 1050 |
| LMArena Spanish | — | 1070 |

## Instruction Following

- GPT-5.5 Pro: —
- Yi-34B: 56.2 (#274)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| LMArena Instruction Following | — | 1091 |

## Long Context

- GPT-5.5 Pro: —
- Yi-34B: 33.2 (#264)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| LMArena Longer Query | — | 1094 |

## Writing & Preference

- GPT-5.5 Pro: —
- Yi-34B: 34.1 (#273)

| Benchmark | GPT-5.5 Pro | Yi-34B |
|---|---|---|
| LMArena Text | — | 1129 |
| LMArena Creative Writing | — | 1108 |
| LMArena Multi-Turn | — | 1113 |

## FAQ

### Is GPT-5.5 Pro better than Yi-34B?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 27.8 on the Noometry Index.

### How many benchmarks do GPT-5.5 Pro and Yi-34B share?

2 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Yi-34B has 23.