Model comparison
GPT-5.3 Chat vs Olmo 7b Instruct
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.3 on the Noometry Index.
Last verified . 10 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 10 benchmarks with published results for both. GPT-5.3 Chat scores higher in 6 categories and Olmo 7b Instruct in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 25.8.
- Olmo 7b Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Olmo 7b Instruct | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 42.8 | 30.3 |
| 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 | 10 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 41.4 (#124), Olmo 7b Instruct: 29.6 (#303)
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Coding | 1408 | 1016 |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Olmo 7b Instruct: 18.8 (#274)
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1399 | 993 |
Math GPT-5.3 Chat leads
GPT-5.3 Chat: 38.2 (#142), Olmo 7b Instruct: 30.2 (#237)
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Math | 1389 | 1018 |
Knowledge Not comparable
GPT-5.3 Chat: 38.8 (#140), Olmo 7b Instruct: —
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Expert | 1397 | — |
Multilingual GPT-5.3 Chat leads
GPT-5.3 Chat: 50.3 (#124), Olmo 7b Instruct: 24.0 (#291)
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Non-English | 1382 | 977 |
| LMArena Chinese | 1432 | 1014 |
| LMArena Russian | 1400 | 947 |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Spanish | 1371 | — |
Instruction Following GPT-5.3 Chat leads
GPT-5.3 Chat: 72.8 (#129), Olmo 7b Instruct: 49.0 (#301)
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Instruction Following | 1378 | 978 |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#120), Olmo 7b Instruct: —
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Olmo 7b Instruct: 25.8 (#303)
| Benchmark | GPT-5.3 Chat | Olmo 7b Instruct |
|---|---|---|
| LMArena Text | 1389 | 1032 |
| LMArena Creative Writing | 1355 | 990 |
| LMArena Multi-Turn | 1412 | 1007 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Olmo 7b Instruct?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.3 on the Noometry Index.
Is GPT-5.3 Chat or Olmo 7b Instruct better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 29.6 in the Noometry coding category.
How many benchmarks do GPT-5.3 Chat and Olmo 7b Instruct share?
10 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Olmo 7b Instruct has 10.