Noometry

Model comparison

GPT-5.5 Instant vs Nemotron 3 Ultra

GPT-5.5 Instant and Nemotron 3 Ultra score almost the same on the Noometry Index (42.7 vs 42.5), so choose on price, context window or the category you care about most.

Last verified . 22 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

Nemotron 3 Ultra NVIDIA

42.5

Rank #113 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GPT-5.5 Instant scores higher in 1 category and Nemotron 3 Ultra in 7 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in math, where Nemotron 3 Ultra leads 35.3 to 26.5.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.1% for GPT-5.5 Instant and 86.7% for Nemotron 3 Ultra.
  • Nemotron 3 Ultra has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantNemotron 3 Ultra
ProviderOpenAINVIDIA
Noometry Index42.742.5
Released2026-05-052026-06-04
WeightsProprietaryOpen
Context window—262K
Max output—128K
Input $ / M tokens—$0.50
Output $ / M tokens—$2.20
Results tracked2730

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 44.3 (#74), Nemotron 3 Ultra: 38.1 (#182)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
SciCode48.6%40.3%
LMArena Coding14331468
FrontierCode—13.6%
WeirdML—43.5%

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, Nemotron 3 Ultra: 23.4 (#126)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
APEX-Agents—22.7%

Reasoning Nemotron 3 Ultra leads

GPT-5.5 Instant: 24.9 (#155), Nemotron 3 Ultra: 31.0 (#82)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
CritPt0%3.1%
Chess Puzzles12%12%
LMArena Hard Prompts14261452
Epoch Capabilities Index142.52146.17
Mystery Game Puzzles—20%
DTBench—90.1%
LMCA—36.9%

Math Nemotron 3 Ultra leads

GPT-5.5 Instant: 26.5 (#259), Nemotron 3 Ultra: 35.3 (#187)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
OTIS Mock AIME 2024-202568.1%86.7%
LMArena Math14201457
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
ProofBench—2%

Knowledge Nemotron 3 Ultra leads

GPT-5.5 Instant: 48.9 (#74), Nemotron 3 Ultra: 52.5 (#61)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
GPQA Diamond82.5%85.4%
LMArena Expert14091472

Multimodal Not comparable

GPT-5.5 Instant: 40.0 (#52), Nemotron 3 Ultra: —

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
LMArena Vision1250—
LMArena Document1403—

Multilingual Too close to call

GPT-5.5 Instant: 52.8 (#80), Nemotron 3 Ultra: 53.5 (#64)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
LMArena Non-English14171427
LMArena Chinese14561497
LMArena French14281472
LMArena German14111471
LMArena Korean13921386
LMArena Russian14311417
LMArena Spanish14291454
LMArena Japanese1408—

Instruction Following Too close to call

GPT-5.5 Instant: 74.2 (#100), Nemotron 3 Ultra: 74.7 (#88)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
LMArena Instruction Following14061418

Long Context Too close to call

GPT-5.5 Instant: 43.4 (#96), Nemotron 3 Ultra: 43.9 (#81)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
LMArena Longer Query14221437

Writing & Preference Nemotron 3 Ultra leads

GPT-5.5 Instant: 61.8 (#85), Nemotron 3 Ultra: 66.3 (#36)

BenchmarkGPT-5.5 InstantNemotron 3 Ultra
LMArena Text14191445
LMArena Creative Writing14191398
LMArena Multi-Turn14331411
EQ-Bench Creative Writing—1692

Frequently asked questions

Is GPT-5.5 Instant better than Nemotron 3 Ultra?

GPT-5.5 Instant and Nemotron 3 Ultra score almost the same on the Noometry Index (42.7 vs 42.5), so choose on price, context window or the category you care about most.

Is GPT-5.5 Instant or Nemotron 3 Ultra better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 38.1 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Nemotron 3 Ultra share?

22 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Nemotron 3 Ultra has 30.

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