Noometry

Model comparison

Gemini 2.5 Flash-Lite vs GPT-4.5

Gemini 2.5 Flash-Lite and GPT-4.5 score almost the same on the Noometry Index (37.0 vs 37.2), so choose on price, context window or the category you care about most.

Last verified . 21 shared benchmarks.

Gemini 2.5 Flash-Lite Google

37.0

Rank #211 Confirmed

GPT-4.5 OpenAI

37.2

Rank #208 Confirmed

Summary

  • They share 21 benchmarks with published results for both. Gemini 2.5 Flash-Lite scores higher in 4 categories and GPT-4.5 in 6 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in multimodal, where GPT-4.5 leads 37.6 to 29.1.
  • The biggest single-benchmark swing is Fiction.LiveBench: 47.2% for Gemini 2.5 Flash-Lite and 63.9% for GPT-4.5.

Side by side

Gemini 2.5 Flash-LiteGPT-4.5
ProviderGoogleOpenAI
Noometry Index37.037.2
Released2025-06-172025-02-27
WeightsProprietaryProprietary
Context window1.05M—
Max output66K—
Input $ / M tokens$0.10—
Output $ / M tokens$0.40—
Results tracked3342

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Category by category

Coding GPT-4.5 leads

Gemini 2.5 Flash-Lite: 38.5 (#173), GPT-4.5: 42.2 (#109)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
WeirdML35.2%39.4%
LMArena Coding13731396
Aider Polyglot—44.9%
LiveBench Coding—75.2%
ALE-Bench325.9—

Agentic & Tool Use Too close to call

Gemini 2.5 Flash-Lite: 28.0 (#96), GPT-4.5: 27.9 (#97)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
Berkeley Function Calling Leaderboard36.9%—
Cybench—17.5%

Reasoning Gemini 2.5 Flash-Lite leads

Gemini 2.5 Flash-Lite: 22.2 (#205), GPT-4.5: 13.9 (#330)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Hard Prompts13771403
Epoch Capabilities Index133.94136.74
ARC-AGI-2—0.8%
SimpleBench—34.5%
Kagi LLM Benchmark40.5%—
ARC-AGI-1—10.3%
EnigmaEval—3.2%
LiveBench Reasoning—71.1%
DTBench62.8%—
LiveBench Data Analysis—64.3%
LMCA18.1%—
ForecastBench—61.7
LiveBench—69%

Math Gemini 2.5 Flash-Lite leads

Gemini 2.5 Flash-Lite: 38.0 (#144), GPT-4.5: 32.6 (#211)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Math13731412
OTIS Mock AIME 2024-2025—37.8%
Omni-MATH48%—
LiveBench Math—69.3%
MATH Level 5—78.6%

Knowledge Too close to call

Gemini 2.5 Flash-Lite: 32.5 (#210), GPT-4.5: 32.5 (#211)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Expert13731394
GPQA Diamond—68.7%
Humanity's Last Exam—5.4%
MMLU-Pro53.7%—
Confabulations—13.6%
Vectara Hallucination Rate3.3%—
GPQA (HELM)30.9%—

Multimodal GPT-4.5 leads

Gemini 2.5 Flash-Lite: 29.1 (#114), GPT-4.5: 37.6 (#71)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Vision11981195
VPCT30%45%

Multilingual GPT-4.5 leads

Gemini 2.5 Flash-Lite: 49.3 (#134), GPT-4.5: 52.5 (#83)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Non-English13691413
LMArena Chinese14041421
LMArena French13881418
LMArena German13891457
LMArena Japanese13591416
LMArena Korean13601392
LMArena Russian13731419
LMArena Spanish1396—

Instruction Following GPT-4.5 leads

Gemini 2.5 Flash-Lite: 70.0 (#168), GPT-4.5: 72.6 (#134)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Instruction Following13671404
LiveBench Instruction Following—72.3%
IFEval81%—

Long Context GPT-4.5 leads

Gemini 2.5 Flash-Lite: 33.3 (#262), GPT-4.5: 40.4 (#155)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
Fiction.LiveBench47.2%63.9%
LMArena Longer Query13731406

Writing & Preference Too close to call

Gemini 2.5 Flash-Lite: 56.8 (#135), GPT-4.5: 56.9 (#134)

BenchmarkGemini 2.5 Flash-LiteGPT-4.5
LMArena Text13791417
LMArena Creative Writing13671394
LMArena Multi-Turn13661444
Short-Story Creative Writing—75.6%
EQ-Bench Creative Writing—1258
WildBench81.8%—
LiveBench Language—61.5%

Frequently asked questions

Is Gemini 2.5 Flash-Lite better than GPT-4.5?

Gemini 2.5 Flash-Lite and GPT-4.5 score almost the same on the Noometry Index (37.0 vs 37.2), so choose on price, context window or the category you care about most.

Is Gemini 2.5 Flash-Lite or GPT-4.5 better for coding?

GPT-4.5 scores higher on coding benchmarks: 42.2 versus 38.5 in the Noometry coding category.

How many benchmarks do Gemini 2.5 Flash-Lite and GPT-4.5 share?

21 benchmarks have published results for both models. Gemini 2.5 Flash-Lite has 33 scored results on Noometry and GPT-4.5 has 42.

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