# Gemini 3 Deep Think vs GPT-5 Mini

> GPT-5 Mini has enough public results to be ranked (#115); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gemini-3-deep-think-vs-gpt-5-mini
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Gemini 3 Deep Think scores higher in 1 category and GPT-5 Mini in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Deep Think leads 70.8 to 24.1.
- The biggest single-benchmark swing is ARC-AGI-2: 84.6% for Gemini 3 Deep Think and 4.4% for GPT-5 Mini.

## Snapshot

| | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 58.5 | 41.7 |
| Rank | — | 115 |
| Context | — | 400K |
| Input $/M | — | $0.25 |
| Output $/M | — | $2 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3 Deep Think: —
- GPT-5 Mini: 40.0 (#134)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| SWE-bench Verified | — | 64.7% |
| SWE-bench Verified (bash only) | — | 59.8% |
| SWE-bench Multilingual | — | 39.7% |
| SciCode | — | 39.2% |
| WeirdML | — | 52.7% |
| LMArena Coding | — | 1406 |
| ALE-Bench | — | 799.77 |
| AlgoTune | — | 1.38 |

## Agentic & Tool Use

- Gemini 3 Deep Think: —
- GPT-5 Mini: 31.0 (#64)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| Terminal-Bench | — | 34.8% |
| Berkeley Function Calling Leaderboard | — | 55.5% |
| Vending-Bench 2 | — | -31.18 |

## Reasoning

- Gemini 3 Deep Think: 70.8 (#11)
- GPT-5 Mini: 24.1 (#153)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| ARC-AGI-2 | 84.6% | 4.4% |
| ARC-AGI-1 | 96% | 54.3% |
| CritPt | 25.7% | 0% |
| Kagi LLM Benchmark | — | 70.3% |
| Chess Puzzles | — | 30% |
| EnigmaEval | — | 8.2% |
| LMArena Hard Prompts | — | 1380 |
| Mystery Game Puzzles | — | 10% |
| DTBench | — | 80.5% |
| LMCA | — | 34.2% |
| Epoch Capabilities Index | — | 145.51 |
| ForecastBench | — | 61 |

## Math

- Gemini 3 Deep Think: —
- GPT-5 Mini: 46.3 (#59)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 46.7% |
| FrontierMath Tier 4 | — | 12.2% |
| OTIS Mock AIME 2024-2025 | — | 86.7% |
| ProofBench | — | 9% |
| Omni-MATH | — | 72.2% |
| LMArena Math | — | 1377 |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 27.2% |
| FrontierMath Tier 4 (v1) | — | 6.3% |

## Knowledge

- Gemini 3 Deep Think: —
- GPT-5 Mini: 45.5 (#80)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| GPQA Diamond | — | 75% |
| Humanity's Last Exam | — | 19.4% |
| SimpleQA Verified | — | 21.6% |
| MMLU-Pro | — | 83.5% |
| Confabulations | — | 13.3% |
| Vectara Hallucination Rate | — | 12.9% |
| GPQA (HELM) | — | 75.6% |
| LMArena Expert | — | 1377 |

## Multimodal

- Gemini 3 Deep Think: —
- GPT-5 Mini: 35.0 (#80)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| LMArena Vision | — | 1202 |
| VPCT | — | 40.2% |

## Multilingual

- Gemini 3 Deep Think: —
- GPT-5 Mini: 49.1 (#131)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| LMArena Non-English | — | 1363 |
| LMArena Chinese | — | 1387 |
| LMArena French | — | 1385 |
| LMArena German | — | 1366 |
| LMArena Japanese | — | 1342 |
| LMArena Korean | — | 1306 |
| LMArena Russian | — | 1362 |
| LMArena Spanish | — | 1355 |

## Instruction Following

- Gemini 3 Deep Think: —
- GPT-5 Mini: 76.4 (#43)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| IFEval | — | 92.7% |
| LMArena Instruction Following | — | 1357 |

## Long Context

- Gemini 3 Deep Think: —
- GPT-5 Mini: 41.9 (#127)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| Fiction.LiveBench | — | 69.4% |
| LMArena Longer Query | — | 1355 |

## Writing & Preference

- Gemini 3 Deep Think: —
- GPT-5 Mini: 55.4 (#143)

| Benchmark | Gemini 3 Deep Think | GPT-5 Mini |
|---|---|---|
| LMArena Text | — | 1373 |
| LMArena Creative Writing | — | 1325 |
| Short-Story Creative Writing | — | 83.1% |
| EQ-Bench Creative Writing | — | 1313 |
| WildBench | — | 85.5% |
| LMArena Multi-Turn | — | 1363 |

## FAQ

### Is Gemini 3 Deep Think better than GPT-5 Mini?

GPT-5 Mini has enough public results to be ranked (#115); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

### How many benchmarks do Gemini 3 Deep Think and GPT-5 Mini share?

3 benchmarks have published results for both models. Gemini 3 Deep Think has 3 scored results on Noometry and GPT-5 Mini has 60.