Noometry

Model comparison

Nemotron 3 Ultra vs o3-pro

Nemotron 3 Ultra and o3-pro score almost the same on the Noometry Index (42.5 vs 42.9), so choose on price, context window or the category you care about most.

Last verified . 4 shared benchmarks.

Nemotron 3 Ultra NVIDIA

42.5

Rank #113 Confirmed

o3-pro OpenAI

42.9

Rank #105 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Nemotron 3 Ultra scores higher in 3 categories and o3-pro in 2 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in long context, where o3-pro leads 72.2 to 43.9.
  • The biggest single-benchmark swing is WeirdML: 43.5% for Nemotron 3 Ultra and 58.2% for o3-pro.
  • Nemotron 3 Ultra is cheaper at $0.60 / $2.40 per million input/output tokens, against $20 / $80 for o3-pro.
  • Nemotron 3 Ultra accepts more context: 262K tokens versus 200K.
  • Nemotron 3 Ultra has downloadable open weights; the other is API-only.

Side by side

Nemotron 3 Ultrao3-pro
ProviderNVIDIAOpenAI
Noometry Index42.542.9
Released2026-06-042025-06-10
WeightsOpenProprietary
Context window262K200K
Max output128K100K
Input $ / M tokens$0.60$20
Output $ / M tokens$2.40$80
Results tracked3012

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Category by category

Coding o3-pro leads

Nemotron 3 Ultra: 38.1 (#182), o3-pro: 55.5 (#24)

BenchmarkNemotron 3 Ultrao3-pro
WeirdML43.5%58.2%
FrontierCode13.6%—
Aider Polyglot—84.9%
SciCode40.3%—
LMArena Coding1468—

Agentic & Tool Use Not comparable

Nemotron 3 Ultra: 23.4 (#126), o3-pro: —

BenchmarkNemotron 3 Ultrao3-pro
APEX-Agents22.7%—

Reasoning Nemotron 3 Ultra leads

Nemotron 3 Ultra: 31.0 (#82), o3-pro: 23.8 (#171)

BenchmarkNemotron 3 Ultrao3-pro
DTBench90.1%86.9%
LMCA36.9%38.5%
Epoch Capabilities Index146.17147.42
ARC-AGI-2—4.9%
Kagi LLM Benchmark—72.1%
ARC-AGI-1—59.3%
CritPt3.1%—
Chess Puzzles12%—
LMArena Hard Prompts1452—
Mystery Game Puzzles20%—

Math Not comparable

Nemotron 3 Ultra: 35.3 (#187), o3-pro: —

BenchmarkNemotron 3 Ultrao3-pro
OTIS Mock AIME 2024-202586.7%—
ProofBench2%—
LMArena Math1457—

Knowledge Nemotron 3 Ultra leads

Nemotron 3 Ultra: 52.5 (#61), o3-pro: 29.5 (#238)

BenchmarkNemotron 3 Ultrao3-pro
GPQA Diamond85.4%—
Confabulations—14.2%
Vectara Hallucination Rate—23.3%
LMArena Expert1472—

Multilingual Not comparable

Nemotron 3 Ultra: 53.5 (#64), o3-pro: —

BenchmarkNemotron 3 Ultrao3-pro
LMArena Non-English1427—
LMArena Chinese1497—
LMArena French1472—
LMArena German1471—
LMArena Korean1386—
LMArena Russian1417—
LMArena Spanish1454—

Instruction Following Not comparable

Nemotron 3 Ultra: 74.7 (#88), o3-pro: —

BenchmarkNemotron 3 Ultrao3-pro
LMArena Instruction Following1418—

Long Context o3-pro leads

Nemotron 3 Ultra: 43.9 (#81), o3-pro: 72.2 (#1)

BenchmarkNemotron 3 Ultrao3-pro
Fiction.LiveBench—97.2%
LMArena Longer Query1437—

Writing & Preference Nemotron 3 Ultra leads

Nemotron 3 Ultra: 66.3 (#36), o3-pro: 57.1 (#133)

BenchmarkNemotron 3 Ultrao3-pro
LMArena Text1445—
LMArena Creative Writing1398—
Short-Story Creative Writing—84.4%
EQ-Bench Creative Writing1692—
LMArena Multi-Turn1411—

Frequently asked questions

Is Nemotron 3 Ultra better than o3-pro?

Nemotron 3 Ultra and o3-pro score almost the same on the Noometry Index (42.5 vs 42.9), so choose on price, context window or the category you care about most.

Which is cheaper, Nemotron 3 Ultra or o3-pro?

Nemotron 3 Ultra is cheaper. It lists at $0.60 per million input tokens and $2.40 per million output tokens; o3-pro lists at $20 and $80.

Is Nemotron 3 Ultra or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.5 versus 38.1 in the Noometry coding category.

Which has the bigger context window?

Nemotron 3 Ultra does, with 262K tokens against 200K.

How many benchmarks do Nemotron 3 Ultra and o3-pro share?

4 benchmarks have published results for both models. Nemotron 3 Ultra has 30 scored results on Noometry and o3-pro has 12.

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