Model comparison
GPT-5.5 Instant vs Olmo 3.1 32b Think
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 37.9 on the Noometry Index.
Last verified . 15 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 15 benchmarks with published results for both. GPT-5.5 Instant scores higher in 6 categories and Olmo 3.1 32b Think in 2 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.5 Instant leads 61.8 to 46.2.
- Olmo 3.1 32b Think has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | Olmo 3.1 32b Think | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 42.7 | 37.9 |
| Released | 2026-05-05 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 15 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 44.3 (#74), Olmo 3.1 32b Think: 37.7 (#189)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Coding | 1433 | 1291 |
| SciCode | 48.6% | — |
Reasoning Too close to call
GPT-5.5 Instant: 24.9 (#155), Olmo 3.1 32b Think: 25.2 (#150)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1272 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.52 | — |
Math Olmo 3.1 32b Think leads
GPT-5.5 Instant: 26.5 (#259), Olmo 3.1 32b Think: 36.3 (#168)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Math | 1420 | 1305 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#74), Olmo 3.1 32b Think: 35.7 (#181)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Expert | 1409 | 1295 |
| GPQA Diamond | 82.5% | — |
Multimodal Not comparable
GPT-5.5 Instant: 40.0 (#52), Olmo 3.1 32b Think: —
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 52.8 (#80), Olmo 3.1 32b Think: 38.1 (#231)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Non-English | 1417 | 1209 |
| LMArena Chinese | 1456 | 1242 |
| LMArena French | 1428 | 1260 |
| LMArena German | 1411 | 1262 |
| LMArena Russian | 1431 | 1193 |
| LMArena Spanish | 1429 | 1289 |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
Instruction Following GPT-5.5 Instant leads
GPT-5.5 Instant: 74.2 (#100), Olmo 3.1 32b Think: 65.6 (#218)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Instruction Following | 1406 | 1247 |
Long Context GPT-5.5 Instant leads
GPT-5.5 Instant: 43.4 (#96), Olmo 3.1 32b Think: 38.6 (#195)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Longer Query | 1422 | 1272 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 61.8 (#85), Olmo 3.1 32b Think: 46.2 (#220)
| Benchmark | GPT-5.5 Instant | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Text | 1419 | 1272 |
| LMArena Creative Writing | 1419 | 1226 |
| LMArena Multi-Turn | 1433 | 1252 |
Frequently asked questions
Is GPT-5.5 Instant better than Olmo 3.1 32b Think?
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 37.9 on the Noometry Index.
Is GPT-5.5 Instant or Olmo 3.1 32b Think better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 37.7 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Olmo 3.1 32b Think share?
15 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Olmo 3.1 32b Think has 15.