Model comparison
GPT-5.1-Codex vs Nemotron 3 Super
Nemotron 3 Super is the stronger model overall, scoring 39.6 to 38.2 on the Noometry Index.
Last verified . 1 shared benchmarks.
NVIDIASummary
- They share 1 benchmark with published results for both. GPT-5.1-Codex scores higher in 1 category and Nemotron 3 Super in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where Nemotron 3 Super leads 37.6 to 29.3.
- Nemotron 3 Super is cheaper at $0.08 / $0.45 per million input/output tokens, against $1.25 / $10 for GPT-5.1-Codex.
- GPT-5.1-Codex accepts more context: 400K tokens versus 262K.
- Nemotron 3 Super has downloadable open weights; the other is API-only.
Side by side
| GPT-5.1-Codex | Nemotron 3 Super | |
|---|---|---|
| Provider | OpenAI | NVIDIA |
| Noometry Index | 38.2 | 39.6 |
| Released | 2025-11-12 | 2026-03-11 |
| Weights | Proprietary | Open |
| Context window | 400K | 262K |
| Max output | 128K | 131K |
| Input $ / M tokens | $1.25 | $0.08 |
| Output $ / M tokens | $10 | $0.45 |
| Results tracked | 6 | 21 |
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Category by category
Coding GPT-5.1-Codex leads
GPT-5.1-Codex: 41.7 (#107), Nemotron 3 Super: 38.9 (#153)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| ALE-Bench | 1,245 | 213.9 |
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| SciCode | — | 36% |
| WeirdML | — | 38% |
| LMArena Coding | — | 1403 |
Agentic & Tool Use Not comparable
GPT-5.1-Codex: 37.8 (#32), Nemotron 3 Super: —
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |
Reasoning Not comparable
GPT-5.1-Codex: —, Nemotron 3 Super: 17.9 (#274)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| NYT Connections (extended) | — | 15.4% |
| CritPt | — | 3.1% |
| LMArena Hard Prompts | — | 1386 |
Math Nemotron 3 Super leads
GPT-5.1-Codex: 29.3 (#218), Nemotron 3 Super: 37.6 (#95)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| MathArena Final-Answer Competitions | — | 60.4% |
| ProofBench | 9% | — |
| LMArena Math | — | 1381 |
Knowledge Not comparable
GPT-5.1-Codex: —, Nemotron 3 Super: 38.2 (#136)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| LMArena Expert | — | 1397 |
Multilingual Not comparable
GPT-5.1-Codex: —, Nemotron 3 Super: 48.6 (#139)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| LMArena Non-English | — | 1356 |
| LMArena Chinese | — | 1430 |
| LMArena French | — | 1404 |
| LMArena German | — | 1341 |
| LMArena Russian | — | 1336 |
| LMArena Spanish | — | 1417 |
Instruction Following Not comparable
GPT-5.1-Codex: —, Nemotron 3 Super: 71.4 (#149)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| LMArena Instruction Following | — | 1347 |
Long Context Not comparable
GPT-5.1-Codex: —, Nemotron 3 Super: 41.5 (#134)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| LMArena Longer Query | — | 1362 |
Writing & Preference Not comparable
GPT-5.1-Codex: —, Nemotron 3 Super: 56.1 (#135)
| Benchmark | GPT-5.1-Codex | Nemotron 3 Super |
|---|---|---|
| LMArena Text | — | 1378 |
| LMArena Creative Writing | — | 1317 |
| LMArena Multi-Turn | — | 1369 |
Frequently asked questions
Is GPT-5.1-Codex better than Nemotron 3 Super?
Nemotron 3 Super is the stronger model overall, scoring 39.6 to 38.2 on the Noometry Index.
Which is cheaper, GPT-5.1-Codex or Nemotron 3 Super?
Nemotron 3 Super is cheaper. It lists at $0.08 per million input tokens and $0.45 per million output tokens; GPT-5.1-Codex lists at $1.25 and $10.
Is GPT-5.1-Codex or Nemotron 3 Super better for coding?
GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 38.9 in the Noometry coding category.
Which has the bigger context window?
GPT-5.1-Codex does, with 400K tokens against 262K.
How many benchmarks do GPT-5.1-Codex and Nemotron 3 Super share?
1 benchmark has published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Nemotron 3 Super has 21.