Noometry

Model comparison

GPT-5.5 Instant vs o1-mini

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 34.0 on the Noometry Index.

Last verified . 20 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

o1-mini OpenAI

34.0

Rank #235 Confirmed

Summary

  • They share 20 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and o1-mini in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-5.5 Instant leads 24.9 to 8.8.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.1% for GPT-5.5 Instant and 46.9% for o1-mini.

Side by side

GPT-5.5 Instanto1-mini
ProviderOpenAIOpenAI
Noometry Index42.734.0
Released2026-05-052024-09-12
WeightsProprietaryProprietary
Context window——
Max output——
Input $ / M tokens——
Output $ / M tokens——
Results tracked2739

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 44.3 (#74), o1-mini: 35.5 (#224)

BenchmarkGPT-5.5 Instanto1-mini
LMArena Coding14331362
Aider Polyglot—32.9%
SciCode48.6%—
WeirdML—36.3%
LiveBench Coding—48%
HumanEval+—89%
MBPP+—78.8%

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, o1-mini: 24.6 (#118)

BenchmarkGPT-5.5 Instanto1-mini
Cybench—10%

Reasoning GPT-5.5 Instant leads

GPT-5.5 Instant: 24.9 (#155), o1-mini: 8.8 (#346)

BenchmarkGPT-5.5 Instanto1-mini
LMArena Hard Prompts14261333
Epoch Capabilities Index142.52135.82
ARC-AGI-2—0.8%
SimpleBench—18.1%
ARC-AGI-1—14%
CritPt0%—
Chess Puzzles12%—
LiveBench Reasoning—72.3%
LiveBench Data Analysis—57.9%
LiveBench—57.8%

Math o1-mini leads

GPT-5.5 Instant: 26.5 (#259), o1-mini: 35.4 (#186)

BenchmarkGPT-5.5 Instanto1-mini
OTIS Mock AIME 2024-202568.1%46.9%
LMArena Math14201358
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
LiveBench Math—62%
MATH Level 5—89.2%
FrontierMath (Feb 2025 set)—1.7%

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#74), o1-mini: 34.9 (#192)

BenchmarkGPT-5.5 Instanto1-mini
GPQA Diamond82.5%62.4%
LMArena Expert14091316
Confabulations—18.6%

Multimodal Not comparable

GPT-5.5 Instant: 40.0 (#52), o1-mini: —

BenchmarkGPT-5.5 Instanto1-mini
LMArena Vision1250—
LMArena Document1403—

Multilingual GPT-5.5 Instant leads

GPT-5.5 Instant: 52.8 (#80), o1-mini: 43.6 (#182)

BenchmarkGPT-5.5 Instanto1-mini
LMArena Non-English14171289
LMArena Chinese14561314
LMArena French14281293
LMArena German14111278
LMArena Japanese14081245
LMArena Korean13921223
LMArena Russian14311283
LMArena Spanish14291303

Instruction Following GPT-5.5 Instant leads

GPT-5.5 Instant: 74.2 (#100), o1-mini: 66.7 (#206)

BenchmarkGPT-5.5 Instanto1-mini
LMArena Instruction Following14061304
LiveBench Instruction Following—65.4%

Long Context GPT-5.5 Instant leads

GPT-5.5 Instant: 43.4 (#96), o1-mini: 40.1 (#161)

BenchmarkGPT-5.5 Instanto1-mini
LMArena Longer Query14221320

Writing & Preference GPT-5.5 Instant leads

GPT-5.5 Instant: 61.8 (#85), o1-mini: 48.4 (#202)

BenchmarkGPT-5.5 Instanto1-mini
LMArena Text14191317
LMArena Creative Writing14191244
LMArena Multi-Turn14331314
Short-Story Creative Writing—64.9%
LiveBench Language—40.9%

Frequently asked questions

Is GPT-5.5 Instant better than o1-mini?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 34.0 on the Noometry Index.

Is GPT-5.5 Instant or o1-mini better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 35.5 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and o1-mini share?

20 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and o1-mini has 39.

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