Model comparison
GPT-5.3 Chat vs Olmo 3.1 32b Think
GPT-5.3 Chat is the stronger model overall, scoring 42.8 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-5.3 Chat scores higher in 8 categories and Olmo 3.1 32b Think 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 46.2.
- Olmo 3.1 32b Think has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Olmo 3.1 32b Think | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 42.8 | 37.9 |
| Released | 2026-03-03 | — |
| Weights | Proprietary | Open |
| Context window | 128K | — |
| Max output | 16K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 18 | 15 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 41.4 (#124), Olmo 3.1 32b Think: 37.7 (#189)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Coding | 1408 | 1291 |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Olmo 3.1 32b Think: 25.2 (#150)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1272 |
Math GPT-5.3 Chat leads
GPT-5.3 Chat: 38.2 (#142), Olmo 3.1 32b Think: 36.3 (#168)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Math | 1389 | 1305 |
Knowledge GPT-5.3 Chat leads
GPT-5.3 Chat: 38.8 (#140), Olmo 3.1 32b Think: 35.7 (#181)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Expert | 1397 | 1295 |
Multilingual GPT-5.3 Chat leads
GPT-5.3 Chat: 50.3 (#124), Olmo 3.1 32b Think: 38.1 (#231)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Non-English | 1382 | 1209 |
| LMArena Chinese | 1432 | 1242 |
| LMArena French | 1397 | 1260 |
| LMArena German | 1384 | 1262 |
| LMArena Russian | 1400 | 1193 |
| LMArena Spanish | 1371 | 1289 |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
Instruction Following GPT-5.3 Chat leads
GPT-5.3 Chat: 72.8 (#129), Olmo 3.1 32b Think: 65.6 (#218)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Instruction Following | 1378 | 1247 |
Long Context GPT-5.3 Chat leads
GPT-5.3 Chat: 42.6 (#120), Olmo 3.1 32b Think: 38.6 (#195)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Longer Query | 1396 | 1272 |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Olmo 3.1 32b Think: 46.2 (#220)
| Benchmark | GPT-5.3 Chat | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Text | 1389 | 1272 |
| LMArena Creative Writing | 1355 | 1226 |
| LMArena Multi-Turn | 1412 | 1252 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Olmo 3.1 32b Think?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 37.9 on the Noometry Index.
Is GPT-5.3 Chat or Olmo 3.1 32b Think better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 37.7 in the Noometry coding category.
How many benchmarks do GPT-5.3 Chat and Olmo 3.1 32b Think share?
15 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Olmo 3.1 32b Think has 15.