Model comparison
GPT-5.4 Pro vs Yi-1.5-34B
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 30.6 on the Noometry Index.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. GPT-5.4 Pro scores higher in 4 categories and Yi-1.5-34B in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.4 Pro leads 68.3 to 14.8.
- The biggest single-benchmark swing is GPQA Diamond: 94.6% for GPT-5.4 Pro and 32% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 Pro | Yi-1.5-34B | |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 58.9 | 30.6 |
| Released | 2026-03-05 | 2024-05-13 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 16 | 21 |
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Category by category
Coding GPT-5.4 Pro leads
GPT-5.4 Pro: 43.2 (#90), Yi-1.5-34B: 32.4 (#272)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| WeirdML | 57.4% | — |
| BigCodeBench Instruct | — | 33.9% |
| LMArena Coding | — | 1169 |
| BigCodeBench Complete | — | 43.8% |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 70.7 (#13), Yi-1.5-34B: 22.5 (#191)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 58.6% | — |
| EnigmaEval | 23.8% | — |
| LMArena Hard Prompts | — | 1160 |
| Epoch Capabilities Index | 158.93 | — |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.4 (#22), Yi-1.5-34B: 27.5 (#249)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| LMArena Math | — | 1182 |
| MATH Level 5 | — | 25.5% |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#7), Yi-1.5-34B: 14.8 (#295)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 94.6% | 32% |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1144 |
Multilingual Not comparable
GPT-5.4 Pro: —, Yi-1.5-34B: 32.3 (#256)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | — | 1121 |
| LMArena Chinese | — | 1213 |
| LMArena French | — | 1156 |
| LMArena German | — | 1111 |
| LMArena Japanese | — | 1021 |
| LMArena Korean | — | 1005 |
| LMArena Russian | — | 1091 |
| LMArena Spanish | — | 1121 |
Instruction Following Not comparable
GPT-5.4 Pro: —, Yi-1.5-34B: 59.2 (#257)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | — | 1139 |
Long Context Not comparable
GPT-5.4 Pro: —, Yi-1.5-34B: 34.6 (#248)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | — | 1143 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, Yi-1.5-34B: 37.4 (#257)
| Benchmark | GPT-5.4 Pro | Yi-1.5-34B |
|---|---|---|
| LMArena Text | — | 1173 |
| LMArena Creative Writing | — | 1135 |
| LMArena Multi-Turn | — | 1153 |
Frequently asked questions
Is GPT-5.4 Pro better than Yi-1.5-34B?
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 30.6 on the Noometry Index.
Is GPT-5.4 Pro or Yi-1.5-34B better for coding?
GPT-5.4 Pro scores higher on coding benchmarks: 43.2 versus 32.4 in the Noometry coding category.
How many benchmarks do GPT-5.4 Pro and Yi-1.5-34B share?
1 benchmark has published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Yi-1.5-34B has 21.