Model comparison
GPT-5.5 Instant vs Yi-1.5-34B
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 30.6 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and Yi-1.5-34B in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 14.8.
- The biggest single-benchmark swing is GPQA Diamond: 82.5% for GPT-5.5 Instant and 32% for Yi-1.5-34B.
- Yi-1.5-34B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | Yi-1.5-34B | |
|---|---|---|
| Provider | OpenAI | 01.AI |
| Noometry Index | 42.7 | 30.6 |
| Released | 2026-05-05 | 2024-05-13 |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 21 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 44.3 (#74), Yi-1.5-34B: 32.4 (#272)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1433 | 1169 |
| SciCode | 48.6% | — |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |
Reasoning GPT-5.5 Instant leads
GPT-5.5 Instant: 24.9 (#155), Yi-1.5-34B: 22.5 (#191)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1160 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.52 | — |
Math Too close to call
GPT-5.5 Instant: 26.5 (#259), Yi-1.5-34B: 27.5 (#249)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1420 | 1182 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| MATH Level 5 | — | 25.5% |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#74), Yi-1.5-34B: 14.8 (#295)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | 82.5% | 32% |
| LMArena Expert | 1409 | 1144 |
Multimodal Not comparable
GPT-5.5 Instant: 40.0 (#52), Yi-1.5-34B: —
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 52.8 (#80), Yi-1.5-34B: 32.3 (#256)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1417 | 1121 |
| LMArena Chinese | 1456 | 1213 |
| LMArena French | 1428 | 1156 |
| LMArena German | 1411 | 1111 |
| LMArena Japanese | 1408 | 1021 |
| LMArena Korean | 1392 | 1005 |
| LMArena Russian | 1431 | 1091 |
| LMArena Spanish | 1429 | 1121 |
Instruction Following GPT-5.5 Instant leads
GPT-5.5 Instant: 74.2 (#100), Yi-1.5-34B: 59.2 (#257)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1406 | 1139 |
Long Context GPT-5.5 Instant leads
GPT-5.5 Instant: 43.4 (#96), Yi-1.5-34B: 34.6 (#248)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1422 | 1143 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 61.8 (#85), Yi-1.5-34B: 37.4 (#257)
| Benchmark | GPT-5.5 Instant | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1419 | 1173 |
| LMArena Creative Writing | 1419 | 1135 |
| LMArena Multi-Turn | 1433 | 1153 |
Frequently asked questions
Is GPT-5.5 Instant better than Yi-1.5-34B?
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 30.6 on the Noometry Index.
Is GPT-5.5 Instant or Yi-1.5-34B better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 32.4 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Yi-1.5-34B share?
18 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Yi-1.5-34B has 21.