Model comparison
Gemini 1.5 Flash (May 2024) vs GPT-5.3 Chat
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 32.9 on the Noometry Index.
Last verified . 17 shared benchmarks.
GoogleSummary
- They share 17 benchmarks with published results for both. Gemini 1.5 Flash (May 2024) scores higher in 0 categories and GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.3 Chat leads 35.4 to 20.8.
Side by side
| Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 32.9 | 42.1 |
| Released | 2024-05-14 | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 16K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 42 | 18 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 33.9 (#233), GPT-5.3 Chat: 40.8 (#124)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1262 | 1408 |
| WeirdML | 24.9% | — |
| BigCodeBench Instruct | 43.5% | — |
| BigCodeBench Complete | 55.1% | — |
| HumanEval+ | 75.6% | — |
| MBPP+ | 67.5% | — |
Agentic & Tool Use Not comparable
Gemini 1.5 Flash (May 2024): 26.3 (#97), GPT-5.3 Chat: —
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| BALROG | 14.6% | — |
Reasoning GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 20.8 (#212), GPT-5.3 Chat: 27.3 (#105)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1257 | 1399 |
| DTBench | 53.8% | — |
| Epoch Capabilities Index | 129.37 | — |
| ForecastBench | 53.9 | — |
| PIQA | 87.5% | — |
Math GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 20.8 (#274), GPT-5.3 Chat: 35.4 (#146)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1269 | 1389 |
| OTIS Mock AIME 2024-2025 | 16.3% | — |
| Omni-MATH | 30.4% | — |
| MATH Level 5 | 61.9% | — |
| FrontierMath (Feb 2025 set) | 0% | — |
| GSM8K | 82.4% | — |
Knowledge GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 26.2 (#253), GPT-5.3 Chat: 38.2 (#137)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1233 | 1397 |
| GPQA Diamond | 47.3% | — |
| MMLU-Pro | 67.8% | — |
| GPQA (HELM) | 43.7% | — |
| BoolQ | 85.8% | — |
| MMLU | 77.9% | — |
Multimodal Not comparable
Gemini 1.5 Flash (May 2024): 35.3 (#76), GPT-5.3 Chat: —
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Vision | 1141 | — |
| Video-MME | 70.3% | — |
| GeoBench | 76% | — |
Multilingual GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 43.1 (#184), GPT-5.3 Chat: 50.5 (#119)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1278 | 1383 |
| LMArena Chinese | 1295 | 1433 |
| LMArena French | 1257 | 1398 |
| LMArena German | 1262 | 1384 |
| LMArena Japanese | 1252 | 1351 |
| LMArena Korean | 1220 | 1347 |
| LMArena Russian | 1288 | 1400 |
| LMArena Spanish | 1242 | 1371 |
Instruction Following GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 67.0 (#199), GPT-5.3 Chat: 73.0 (#124)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1258 | 1378 |
| IFEval | 83.1% | — |
Long Context GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 39.0 (#182), GPT-5.3 Chat: 42.6 (#115)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1284 | 1396 |
Writing & Preference GPT-5.3 Chat leads
Gemini 1.5 Flash (May 2024): 48.9 (#190), GPT-5.3 Chat: 63.3 (#65)
| Benchmark | Gemini 1.5 Flash (May 2024) | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1287 | 1389 |
| LMArena Creative Writing | 1285 | 1356 |
| LMArena Multi-Turn | 1253 | 1413 |
| EQ-Bench Creative Writing | — | 1690 |
| WildBench | 79.2% | — |
Frequently asked questions
Is Gemini 1.5 Flash (May 2024) better than GPT-5.3 Chat?
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 32.9 on the Noometry Index.
Is Gemini 1.5 Flash (May 2024) or GPT-5.3 Chat better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 40.8 versus 33.9 in the Noometry coding category.
How many benchmarks do Gemini 1.5 Flash (May 2024) and GPT-5.3 Chat share?
17 benchmarks have published results for both models. Gemini 1.5 Flash (May 2024) has 42 scored results on Noometry and GPT-5.3 Chat has 18.