# GPT-5.4 mini vs Yi-1.5-34B

> GPT-5.4 mini is the stronger model overall, scoring 45.0 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-4-mini-vs-yi-1-5-34b
- Last updated: 2026-10-12
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. GPT-5.4 mini scores higher in 8 categories and Yi-1.5-34B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.4 mini leads 51.5 to 14.8.
- The biggest single-benchmark swing is GPQA Diamond: 86.9% for GPT-5.4 mini and 32% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 45.0 | 30.6 |
| Rank | 76 | 289 |
| Context | 400K | — |
| Input $/M | $0.75 | — |
| Output $/M | $4.50 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.4 mini: 45.2 (#72)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1438 | 1169 |
| FrontierCode | 27% | — |
| LMArena WebDev | 1397 | — |
| SciCode | 49.9% | — |
| WeirdML | 60.3% | — |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |
| ALE-Bench | 1,189 | — |

## Agentic & Tool Use

- GPT-5.4 mini: 29.9 (#81)
- Yi-1.5-34B: —

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| DeepResearch Bench | 36.3% | — |

## Reasoning

- GPT-5.4 mini: 30.4 (#85)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1160 |
| ARC-AGI-2 | 18.9% | — |
| Kagi LLM Benchmark | 37.9% | — |
| NYT Connections (extended) | 61.8% | — |
| ARC-AGI-1 | 63.7% | — |
| CritPt | 10% | — |
| Chess Puzzles | 24% | — |
| Thematic Generalization | 61.7% | — |
| Mystery Game Puzzles | 11% | — |
| DTBench | 80% | — |
| LMCA | 40.8% | — |
| Epoch Capabilities Index | 148.84 | — |
| ForecastBench | 57 | — |

## Math

- GPT-5.4 mini: 45.5 (#75)
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1419 | 1182 |
| FrontierMath (Tiers 1-3) | 51.2% | — |
| FrontierMath Tier 4 | 9.8% | — |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | 21% | — |
| MATH Level 5 | — | 25.5% |
| FrontierMath (Feb 2025 set) | 28.3% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- GPT-5.4 mini: 51.5 (#67)
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 86.9% | 32% |
| LMArena Expert | 1435 | 1144 |
| SimpleQA Verified | 29.4% | — |
| Vectara Hallucination Rate | 5.5% | — |

## Multimodal

- GPT-5.4 mini: 39.7 (#56)
- Yi-1.5-34B: —

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Vision | 1245 | — |

## Multilingual

- GPT-5.4 mini: 51.9 (#96)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1405 | 1121 |
| LMArena Chinese | 1446 | 1213 |
| LMArena French | 1440 | 1156 |
| LMArena German | 1409 | 1111 |
| LMArena Japanese | 1374 | 1021 |
| LMArena Korean | 1368 | 1005 |
| LMArena Russian | 1417 | 1091 |
| LMArena Spanish | 1405 | 1121 |

## Instruction Following

- GPT-5.4 mini: 74.1 (#102)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1405 | 1139 |

## Long Context

- GPT-5.4 mini: 43.0 (#112)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1407 | 1143 |

## Writing & Preference

- GPT-5.4 mini: 64.0 (#58)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | GPT-5.4 mini | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1412 | 1173 |
| LMArena Creative Writing | 1370 | 1135 |
| LMArena Multi-Turn | 1429 | 1153 |
| EQ-Bench Creative Writing | 1665 | — |

## FAQ

### Is GPT-5.4 mini better than Yi-1.5-34B?

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 30.6 on the Noometry Index.

### Is GPT-5.4 mini or Yi-1.5-34B better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.2 versus 32.4 in the Noometry coding category.

### How many benchmarks do GPT-5.4 mini and Yi-1.5-34B share?

18 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Yi-1.5-34B has 21.