Model comparison
GPT-5.3 Chat vs Llama 3.1 Nemotron Ultra 253b v1
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 36.7 on the Noometry Index.
Last verified . 10 shared benchmarks.
NVIDIASummary
- They share 10 benchmarks with published results for both. GPT-5.3 Chat scores higher in 7 categories and Llama 3.1 Nemotron Ultra 253b v1 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 52.2.
- Llama 3.1 Nemotron Ultra 253b v1 has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 | |
|---|---|---|
| Provider | OpenAI | NVIDIA |
| Noometry Index | 42.8 | 36.7 |
| 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 | 11 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 41.4 (#124), Llama 3.1 Nemotron Ultra 253b v1: 38.4 (#177)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Coding | 1408 | 1312 |
Agentic & Tool Use Not comparable
GPT-5.3 Chat: —, Llama 3.1 Nemotron Ultra 253b v1: 15.7 (#149)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 10% |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Llama 3.1 Nemotron Ultra 253b v1: 26.3 (#134)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1316 |
Math Too close to call
GPT-5.3 Chat: 38.2 (#142), Llama 3.1 Nemotron Ultra 253b v1: 37.5 (#152)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Math | 1389 | 1360 |
Knowledge Not comparable
GPT-5.3 Chat: 38.8 (#140), Llama 3.1 Nemotron Ultra 253b v1: —
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Expert | 1397 | — |
Multilingual GPT-5.3 Chat leads
GPT-5.3 Chat: 50.3 (#124), Llama 3.1 Nemotron Ultra 253b v1: 43.1 (#187)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Non-English | 1382 | 1282 |
| LMArena Russian | 1400 | 1284 |
| LMArena Chinese | 1432 | — |
| 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), Llama 3.1 Nemotron Ultra 253b v1: 69.0 (#178)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Instruction Following | 1378 | 1308 |
Long Context GPT-5.3 Chat leads
GPT-5.3 Chat: 42.6 (#120), Llama 3.1 Nemotron Ultra 253b v1: 39.5 (#177)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Longer Query | 1396 | 1299 |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Llama 3.1 Nemotron Ultra 253b v1: 52.2 (#175)
| Benchmark | GPT-5.3 Chat | Llama 3.1 Nemotron Ultra 253b v1 |
|---|---|---|
| LMArena Text | 1389 | 1320 |
| LMArena Creative Writing | 1355 | 1314 |
| LMArena Multi-Turn | 1412 | 1317 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Llama 3.1 Nemotron Ultra 253b v1?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 36.7 on the Noometry Index.
Is GPT-5.3 Chat or Llama 3.1 Nemotron Ultra 253b v1 better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 38.4 in the Noometry coding category.
How many benchmarks do GPT-5.3 Chat and Llama 3.1 Nemotron Ultra 253b v1 share?
10 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Llama 3.1 Nemotron Ultra 253b v1 has 11.