Model comparison
GPT-5.3 Chat vs Yi-1.5-34B
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.6 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. GPT-5.3 Chat 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 writing & preference, where GPT-5.3 Chat leads 63.1 to 37.4.
- Yi-1.5-34B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Yi-1.5-34B | |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 42.8 | 30.6 |
| Released | 2026-03-03 | 2024-05-13 |
| Weights | Proprietary | Open |
| Context window | 128K | — |
| Max output | 16K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 18 | 21 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 41.4 (#124), Yi-1.5-34B: 32.4 (#272)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1408 | 1169 |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Yi-1.5-34B: 22.5 (#191)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1160 |
Math GPT-5.3 Chat leads
GPT-5.3 Chat: 38.2 (#142), Yi-1.5-34B: 27.5 (#249)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1389 | 1182 |
| MATH Level 5 | — | 25.5% |
Knowledge GPT-5.3 Chat leads
GPT-5.3 Chat: 38.8 (#140), Yi-1.5-34B: 14.8 (#295)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Expert | 1397 | 1144 |
| GPQA Diamond | — | 32% |
Multilingual GPT-5.3 Chat leads
GPT-5.3 Chat: 50.3 (#124), Yi-1.5-34B: 32.3 (#256)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1382 | 1121 |
| LMArena Chinese | 1432 | 1213 |
| LMArena French | 1397 | 1156 |
| LMArena German | 1384 | 1111 |
| LMArena Japanese | 1352 | 1021 |
| LMArena Korean | 1346 | 1005 |
| LMArena Russian | 1400 | 1091 |
| LMArena Spanish | 1371 | 1121 |
Instruction Following GPT-5.3 Chat leads
GPT-5.3 Chat: 72.8 (#129), Yi-1.5-34B: 59.2 (#257)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1378 | 1139 |
Long Context GPT-5.3 Chat leads
GPT-5.3 Chat: 42.6 (#120), Yi-1.5-34B: 34.6 (#248)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1396 | 1143 |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Yi-1.5-34B: 37.4 (#257)
| Benchmark | GPT-5.3 Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1389 | 1173 |
| LMArena Creative Writing | 1355 | 1135 |
| LMArena Multi-Turn | 1412 | 1153 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Yi-1.5-34B?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.6 on the Noometry Index.
Is GPT-5.3 Chat or Yi-1.5-34B better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 32.4 in the Noometry coding category.
How many benchmarks do GPT-5.3 Chat and Yi-1.5-34B share?
17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Yi-1.5-34B has 21.