Noometry

Model comparison

Gemini 3.5 Flash Lite vs GPT-5.5

GPT-5.5 is the stronger model overall, scoring 63.4 to 41.5 on the Noometry Index. Gemini 3.5 Flash Lite costs 13× less per token, which makes it the better buy when GPT-5.5's lead doesn't matter for your workload.

Last verified . 39 shared benchmarks.

Gemini 3.5 Flash Lite Google

41.5

Rank #133 Confirmed

GPT-5.5 OpenAI

63.4

Rank #9 Confirmed

Summary

  • They share 39 benchmarks with published results for both. Gemini 3.5 Flash Lite scores higher in 0 categories and GPT-5.5 in 10 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5.5 leads 81.7 to 25.9.
  • The biggest single-benchmark swing is ARC-AGI-2: 10.3% for Gemini 3.5 Flash Lite and 85% for GPT-5.5.
  • Gemini 3.5 Flash Lite is cheaper at $0.30 / $2.50 per million input/output tokens, against $5 / $30 for GPT-5.5.
  • GPT-5.5 accepts more context: 1.05M tokens versus 1.05M.

Side by side

Gemini 3.5 Flash LiteGPT-5.5
ProviderGoogleOpenAI
Noometry Index41.563.4
Released2026-07-212026-04-23
WeightsProprietaryProprietary
Context window1.05M1.05M
Max output66K128K
Input $ / M tokens$0.30$5
Output $ / M tokens$2.50$30
Results tracked3971

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Category by category

Coding GPT-5.5 leads

Gemini 3.5 Flash Lite: 42.4 (#104), GPT-5.5: 58.2 (#17)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
LMArena WebDev14401513
SciCode41.3%56.1%
WeirdML39%84.9%
LMArena Coding14531494
ALE-Bench765.271,943
SWE-bench Verified—80.6%
DeepSWE—67%
FrontierCode—43%
GSO—40.2%
MirrorCode—10%

Agentic & Tool Use GPT-5.5 leads

Gemini 3.5 Flash Lite: 25.7 (#107), GPT-5.5: 50.7 (#6)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
APEX-Agents29.3%55.1%
GDP.pdf10%26%
Terminal-Bench—84.7%
OSWorld 2.0—13%
Remote Labor Index—6.3%
τ²-bench Banking—44.6%
DeepResearch Bench—54%
PostTrainBench—27.2%
ExploitBench—47.4%
GBAEval—53.2%
LMArena Search—1242
Vending-Bench 2—7,524

Reasoning GPT-5.5 leads

Gemini 3.5 Flash Lite: 27.8 (#114), GPT-5.5: 72.8 (#11)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
ARC-AGI-210.3%85%
NYT Connections (extended)60.4%96.2%
ARC-AGI-153.5%95%
CritPt0%27.1%
Chess Puzzles22%54%
LMArena Hard Prompts14411489
Mystery Game Puzzles19%56%
DTBench83.5%96%
LMCA37.6%54.3%
Epoch Capabilities Index145.13159.1
SimpleBench—69%
Kagi LLM Benchmark—88.8%
EBR-Bench—34.3%
Surface Evolver Bench—88.1%
Bench to the Future 3—0.14
ForecastBench—60.6

Math GPT-5.5 leads

Gemini 3.5 Flash Lite: 25.9 (#264), GPT-5.5: 81.7 (#11)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
FrontierMath (Tiers 1-3)26%85.3%
FrontierMath Tier 40%72.5%
OTIS Mock AIME 2024-202571.1%100%
ProofBench13%50%
LMArena Math14331486
MathArena Final-Answer Competitions—94.3%
FrontierMath (Feb 2025 set)—51.7%
FrontierMath Erdős—0%
FrontierMath Tier 4 (v1)—35.4%

Knowledge GPT-5.5 leads

Gemini 3.5 Flash Lite: 50.1 (#72), GPT-5.5: 64.4 (#17)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
GPQA Diamond83.3%94%
LMArena Expert14351508
SimpleQA Verified—63%
Vectara Hallucination Rate—9.3%

Multimodal GPT-5.5 leads

Gemini 3.5 Flash Lite: 41.1 (#40), GPT-5.5: 46.9 (#12)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
LMArena Vision12681297
Blueprint-Bench 2—36.2%
Furniture Assembly—44.2%
LMArena Document—1486

Multilingual GPT-5.5 leads

Gemini 3.5 Flash Lite: 53.5 (#63), GPT-5.5: 56.4 (#20)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
LMArena Non-English14271467
LMArena Chinese14691533
LMArena French14511486
LMArena German14541480
LMArena Japanese14271498
LMArena Korean14071460
LMArena Russian14431473
LMArena Spanish14421468

Instruction Following GPT-5.5 leads

Gemini 3.5 Flash Lite: 74.8 (#85), GPT-5.5: 77.5 (#18)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
LMArena Instruction Following14201479

Long Context GPT-5.5 leads

Gemini 3.5 Flash Lite: 43.9 (#84), GPT-5.5: 48.3 (#12)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
LMArena Longer Query14351484
CL-bench Life—22.2%

Writing & Preference GPT-5.5 leads

Gemini 3.5 Flash Lite: 64.2 (#57), GPT-5.5: 72.7 (#13)

BenchmarkGemini 3.5 Flash LiteGPT-5.5
LMArena Text14351472
LMArena Creative Writing14201455
EQ-Bench Creative Writing15591844
LMArena Multi-Turn14451476
EQ-Bench 4—1315

Frequently asked questions

Is Gemini 3.5 Flash Lite better than GPT-5.5?

GPT-5.5 is the stronger model overall, scoring 63.4 to 41.5 on the Noometry Index. Gemini 3.5 Flash Lite costs 13× less per token, which makes it the better buy when GPT-5.5's lead doesn't matter for your workload.

Which is cheaper, Gemini 3.5 Flash Lite or GPT-5.5?

Gemini 3.5 Flash Lite is cheaper. It lists at $0.30 per million input tokens and $2.50 per million output tokens; GPT-5.5 lists at $5 and $30.

Is Gemini 3.5 Flash Lite or GPT-5.5 better for coding?

GPT-5.5 scores higher on coding benchmarks: 58.2 versus 42.4 in the Noometry coding category.

Which has the bigger context window?

GPT-5.5 does, with 1.05M tokens against 1.05M.

How many benchmarks do Gemini 3.5 Flash Lite and GPT-5.5 share?

39 benchmarks have published results for both models. Gemini 3.5 Flash Lite has 39 scored results on Noometry and GPT-5.5 has 71.

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