Noometry

Model comparison

GPT-5.5 Instant vs Phi 3 Mini 128k Instruct

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 29.7 on the Noometry Index.

Last verified . 17 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

Phi 3 Mini 128k Instruct Microsoft

29.7

Rank #305 Confirmed

Summary

  • They share 17 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and Phi 3 Mini 128k Instruct in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where GPT-5.5 Instant leads 61.8 to 27.1.
  • Phi 3 Mini 128k Instruct has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantPhi 3 Mini 128k Instruct
ProviderOpenAIMicrosoft
Noometry Index42.729.7
Released2026-05-052024-04-23
WeightsProprietaryOpen
Context window——
Max output——
Input $ / M tokens——
Output $ / M tokens——
Results tracked2719

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 44.3 (#74), Phi 3 Mini 128k Instruct: 28.8 (#312)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Coding14331039
SciCode48.6%—
BigCodeBench Instruct—29.6%
BigCodeBench Complete—40.6%

Reasoning GPT-5.5 Instant leads

GPT-5.5 Instant: 24.9 (#155), Phi 3 Mini 128k Instruct: 19.6 (#256)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Hard Prompts14261028
CritPt0%—
Chess Puzzles12%—
Epoch Capabilities Index142.52—

Math Phi 3 Mini 128k Instruct leads

GPT-5.5 Instant: 26.5 (#259), Phi 3 Mini 128k Instruct: 31.6 (#222)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Math14201089
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.1%—

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#74), Phi 3 Mini 128k Instruct: 26.8 (#254)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Expert1409984
GPQA Diamond82.5%—

Multimodal Not comparable

GPT-5.5 Instant: 40.0 (#52), Phi 3 Mini 128k Instruct: —

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Vision1250—
LMArena Document1403—

Multilingual GPT-5.5 Instant leads

GPT-5.5 Instant: 52.8 (#80), Phi 3 Mini 128k Instruct: 25.2 (#285)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Non-English14171000
LMArena Chinese14561016
LMArena French14281039
LMArena German14111006
LMArena Japanese1408899
LMArena Korean1392856
LMArena Russian14311004
LMArena Spanish14291059

Instruction Following GPT-5.5 Instant leads

GPT-5.5 Instant: 74.2 (#100), Phi 3 Mini 128k Instruct: 51.8 (#294)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Instruction Following14061023

Long Context GPT-5.5 Instant leads

GPT-5.5 Instant: 43.4 (#96), Phi 3 Mini 128k Instruct: 30.4 (#289)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Longer Query1422996

Writing & Preference GPT-5.5 Instant leads

GPT-5.5 Instant: 61.8 (#85), Phi 3 Mini 128k Instruct: 27.1 (#301)

BenchmarkGPT-5.5 InstantPhi 3 Mini 128k Instruct
LMArena Text14191050
LMArena Creative Writing14191024
LMArena Multi-Turn1433989

Frequently asked questions

Is GPT-5.5 Instant better than Phi 3 Mini 128k Instruct?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 29.7 on the Noometry Index.

Is GPT-5.5 Instant or Phi 3 Mini 128k Instruct better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 28.8 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Phi 3 Mini 128k Instruct share?

17 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Phi 3 Mini 128k Instruct has 19.

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