Model comparison
GPT-5.3 Chat vs Molmo 2 8b
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 39.1 on the Noometry Index.
Last verified . 4 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 4 benchmarks with published results for both. GPT-5.3 Chat scores higher in 4 categories and Molmo 2 8b in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 49.4.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Molmo 2 8b | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 42.8 | 39.1 |
| 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 | 5 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
GPT-5.3 Chat: 41.4 (#124), Molmo 2 8b: —
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Coding | 1408 | — |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Molmo 2 8b: 25.6 (#146)
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1287 |
Math Not comparable
GPT-5.3 Chat: 38.2 (#142), Molmo 2 8b: —
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Math | 1389 | — |
Knowledge Not comparable
GPT-5.3 Chat: 38.8 (#140), Molmo 2 8b: —
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Expert | 1397 | — |
Multimodal Not comparable
GPT-5.3 Chat: —, Molmo 2 8b: 30.2 (#112)
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
Multilingual GPT-5.3 Chat leads
GPT-5.3 Chat: 50.3 (#124), Molmo 2 8b: 42.7 (#190)
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1382 | 1276 |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |
Instruction Following GPT-5.3 Chat leads
GPT-5.3 Chat: 72.8 (#129), Molmo 2 8b: 67.0 (#201)
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1378 | 1270 |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#120), Molmo 2 8b: —
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Molmo 2 8b: 49.4 (#191)
| Benchmark | GPT-5.3 Chat | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1389 | 1288 |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Molmo 2 8b?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 39.1 on the Noometry Index.
How many benchmarks do GPT-5.3 Chat and Molmo 2 8b share?
4 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Molmo 2 8b has 5.