Model comparison
Gemini 1.5 Pro (May 2024) vs GPT-5.5 Instant
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 31.9 on the Noometry Index.
Last verified . 21 shared benchmarks.
GoogleSummary
- They share 21 benchmarks with published results for both. Gemini 1.5 Pro (May 2024) scores higher in 0 categories and GPT-5.5 Instant in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 29.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 23.1% for Gemini 1.5 Pro (May 2024) and 68.1% for GPT-5.5 Instant.
Side by side
| Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 31.9 | 42.5 |
| Released | 2024-02-15 | 2026-05-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 45 | 27 |
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Category by category
Coding GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 33.8 (#239), GPT-5.5 Instant: 43.7 (#73)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Coding | 1294 | 1433 |
| SciCode | — | 48.6% |
| WeirdML | 22.2% | — |
| BigCodeBench Instruct | 43.8% | — |
| BigCodeBench Complete | 57.5% | — |
| CadEval | 34% | — |
| HumanEval+ | 79.3% | — |
| MBPP+ | 74.6% | — |
Agentic & Tool Use Not comparable
Gemini 1.5 Pro (May 2024): 17.8 (#137), GPT-5.5 Instant: —
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| TheAgentCompany | 3.4% | — |
| Cybench | 7.5% | — |
| BALROG | 21% | — |
Reasoning GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 12.3 (#332), GPT-5.5 Instant: 24.2 (#149)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1296 | 1426 |
| Epoch Capabilities Index | 131.73 | 142.48 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 27.1% | — |
| CritPt | — | 0% |
| Chess Puzzles | — | 12% |
| DTBench | 59% | — |
| BIG-Bench Hard | 89.2% | — |
| ForecastBench | 58.4 | — |
Math GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 24.4 (#260), GPT-5.5 Instant: 26.1 (#241)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 23.1% | 68.1% |
| LMArena Math | 1315 | 1420 |
| FrontierMath (Tiers 1-3) | — | 26.3% |
| FrontierMath Tier 4 | — | 2.4% |
| Omni-MATH | 36.4% | — |
| MATH Level 5 | 70.4% | — |
Knowledge GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 29.3 (#228), GPT-5.5 Instant: 48.9 (#68)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | 57.2% | 82.5% |
| LMArena Expert | 1279 | 1409 |
| Humanity's Last Exam | 4.6% | — |
| MMLU-Pro | 73.7% | — |
| Confabulations | 13.5% | — |
| GPQA (HELM) | 53.4% | — |
| MMLU | 86.9% | — |
Multimodal GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 36.2 (#72), GPT-5.5 Instant: 39.3 (#48)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | 1161 | 1250 |
| Video-MME | 75% | — |
| LMArena Document | — | 1403 |
Multilingual GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 45.5 (#169), GPT-5.5 Instant: 53.0 (#76)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1312 | 1417 |
| LMArena Chinese | 1331 | 1457 |
| LMArena French | 1301 | 1428 |
| LMArena German | 1286 | 1410 |
| LMArena Japanese | 1292 | 1408 |
| LMArena Korean | 1298 | 1393 |
| LMArena Russian | 1320 | 1430 |
| LMArena Spanish | 1310 | 1430 |
Instruction Following GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 68.8 (#180), GPT-5.5 Instant: 74.4 (#94)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1297 | 1407 |
| IFEval | 83.7% | — |
Long Context GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 39.7 (#164), GPT-5.5 Instant: 43.4 (#92)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1308 | 1422 |
Writing & Preference GPT-5.5 Instant leads
Gemini 1.5 Pro (May 2024): 52.5 (#167), GPT-5.5 Instant: 62.0 (#81)
| Benchmark | Gemini 1.5 Pro (May 2024) | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1319 | 1419 |
| LMArena Creative Writing | 1333 | 1420 |
| LMArena Multi-Turn | 1296 | 1434 |
| WildBench | 81.3% | — |
Frequently asked questions
Is Gemini 1.5 Pro (May 2024) better than GPT-5.5 Instant?
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 31.9 on the Noometry Index.
Is Gemini 1.5 Pro (May 2024) or GPT-5.5 Instant better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 33.8 in the Noometry coding category.
How many benchmarks do Gemini 1.5 Pro (May 2024) and GPT-5.5 Instant share?
21 benchmarks have published results for both models. Gemini 1.5 Pro (May 2024) has 45 scored results on Noometry and GPT-5.5 Instant has 27.