Noometry

Model comparison

Gemini 3.6 Flash vs GPT-5.3 Chat

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 42.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

Gemini 3.6 Flash Google

54.1

Rank #30 Confirmed

GPT-5.3 Chat OpenAI

42.1

Rank #109 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Gemini 3.6 Flash scores higher in 8 categories and GPT-5.3 Chat in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.6 Flash leads 58.9 to 27.3.
  • Gemini 3.6 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
  • Gemini 3.6 Flash accepts more context: 1.05M tokens versus 128K.

Side by side

Gemini 3.6 FlashGPT-5.3 Chat
ProviderGoogleOpenAI
Noometry Index54.142.1
Released2026-07-212026-03-03
WeightsProprietaryProprietary
Context window1.05M128K
Max output66K16K
Input $ / M tokens$0.75$1.75
Output $ / M tokens$3.75$14
Results tracked4618

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Category by category

Coding Gemini 3.6 Flash leads

Gemini 3.6 Flash: 49.6 (#45), GPT-5.3 Chat: 40.8 (#124)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Coding14921408
DeepSWE46.7%—
FrontierCode34.4%—
LMArena WebDev1536—
SciCode52.7%—
WeirdML56.1%—
ALE-Bench715.52—

Agentic & Tool Use Not comparable

Gemini 3.6 Flash: 32.4 (#56), GPT-5.3 Chat: —

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
APEX-Agents46.9%—
GDP.pdf14%—

Reasoning Gemini 3.6 Flash leads

Gemini 3.6 Flash: 58.9 (#20), GPT-5.3 Chat: 27.3 (#105)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Hard Prompts14861399
ARC-AGI-260.4%—
NYT Connections (extended)89%—
ARC-AGI-191.2%—
CritPt10.6%—
Chess Puzzles43%—
Mystery Game Puzzles30%—
DTBench95.5%—
LMCA44.9%—
Epoch Capabilities Index154.36—

Math Gemini 3.6 Flash leads

Gemini 3.6 Flash: 57.0 (#33), GPT-5.3 Chat: 35.4 (#146)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Math15041389
FrontierMath (Tiers 1-3)58.9%—
FrontierMath Tier 422%—
MathArena Final-Answer Competitions70.8%—
OTIS Mock AIME 2024-202594.2%—
ProofBench36%—

Knowledge Gemini 3.6 Flash leads

Gemini 3.6 Flash: 67.8 (#7), GPT-5.3 Chat: 38.2 (#137)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Expert14891397
GPQA Diamond94.1%—
SimpleQA Verified66.2%—

Multimodal Not comparable

Gemini 3.6 Flash: 38.7 (#55), GPT-5.3 Chat: —

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Vision1297—
Blueprint-Bench 231.2%—
Furniture Assembly23.3%—
LMArena Document1456—

Multilingual Gemini 3.6 Flash leads

Gemini 3.6 Flash: 56.8 (#17), GPT-5.3 Chat: 50.5 (#119)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Non-English14701383
LMArena Chinese15301433
LMArena French15011398
LMArena German14781384
LMArena Japanese14771351
LMArena Korean14351347
LMArena Russian14901400
LMArena Spanish14771371

Instruction Following Gemini 3.6 Flash leads

Gemini 3.6 Flash: 77.2 (#27), GPT-5.3 Chat: 73.0 (#124)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Instruction Following14671378

Long Context Gemini 3.6 Flash leads

Gemini 3.6 Flash: 45.1 (#47), GPT-5.3 Chat: 42.6 (#115)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Longer Query14751396

Writing & Preference Gemini 3.6 Flash leads

Gemini 3.6 Flash: 68.3 (#26), GPT-5.3 Chat: 63.3 (#65)

BenchmarkGemini 3.6 FlashGPT-5.3 Chat
LMArena Text14781389
LMArena Creative Writing14641356
EQ-Bench Creative Writing16041690
LMArena Multi-Turn14811413

Frequently asked questions

Is Gemini 3.6 Flash better than GPT-5.3 Chat?

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 42.1 on the Noometry Index.

Which is cheaper, Gemini 3.6 Flash or GPT-5.3 Chat?

Gemini 3.6 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

Is Gemini 3.6 Flash or GPT-5.3 Chat better for coding?

Gemini 3.6 Flash scores higher on coding benchmarks: 49.6 versus 40.8 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.6 Flash does, with 1.05M tokens against 128K.

How many benchmarks do Gemini 3.6 Flash and GPT-5.3 Chat share?

18 benchmarks have published results for both models. Gemini 3.6 Flash has 46 scored results on Noometry and GPT-5.3 Chat has 18.

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