Model comparison
Gemini 3 Pro Deep Think vs GPT-5.2
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemini 3 Pro Deep Think #41 (Estimated); GPT-5.2 #64 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemini 3 Pro Deep Think and GPT-5.2 share 2 comparable benchmark results. 1 of 8 categories are comparable. 0 results are unique to Gemini 3 Pro Deep Think; 26 to GPT-5.2.
Updated July 20, 2026- Shared results
- 2
- Gemini 3 Pro Deep Think only
- 0
- GPT-5.2 only
- 26
- Comparable categories
- 1 / 8
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. GPT-5.2 only becomes the better choice if reasoning is the priority.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 3 Pro Deep Think has the cleaner BenchAlign overall profile here, landing at 61.31 versus 58.43. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 400K for GPT-5.2.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Gemini 3 Pro Deep Think | Δ | GPT-5.2 |
|---|---|---|---|
| Reasoning | Gemini 3 Pro Deep Think45.1 | Margin→ 7.8 | GPT-5.252.9 |
| Agentic | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | GPT-5.255.7 |
| Coding | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | GPT-5.270.6 |
| Knowledge | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | GPT-5.292.4 |
| Math | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | GPT-5.235.2 |
| Multimodal | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | GPT-5.280.4 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
ARC-AGI-2
ReasoningA 45.1%B 52.9%Winner: GPT-5.2Δ 7.8ARC-AGI-2: Gemini 3 Pro Deep Think scored 45.1%; GPT-5.2 scored 52.9%. GPT-5.2 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3 Pro Deep Think | GPT-5.2 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3 Pro Deep ThinkNot available | GPT-5.2$1.75 input / $14 output | A complete price comparison is not available. |
| Generation speedtokens per second | Gemini 3 Pro Deep ThinkNot available | GPT-5.273 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 3 Pro Deep ThinkNot available | GPT-5.2130.34 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 3 Pro Deep Think2M | GPT-5.2400K | Gemini 3 Pro Deep Think lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding4 benchmarks
ReasoningGPT-5.2 wins3 benchmarks
Knowledge7 benchmarks
| Benchmark | Gemini 3 Pro Deep Think | GPT-5.2 | Result |
|---|---|---|---|
| GPQASource | — | 92.4% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 42.2% | Not comparable |
| AA-GPQA DiamondSource | — | 90.3% | Not comparable |
| AA-HLESource | — | 35.4% | Not comparable |
| AA-Omniscience IndexSource | — | -1.0% | Not comparable |
| AA-Omniscience AccuracySource | — | 43.8% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 79.7% | Not comparable |
Math3 benchmarks
Multimodal5 benchmarks
Inst. Following1 benchmarks
| Benchmark | Gemini 3 Pro Deep Think | GPT-5.2 | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 75.4% | Not comparable |
Frequently Asked Questions (2)
Which is better, Gemini 3 Pro Deep Think or GPT-5.2?
Gemini 3 Pro Deep Think is ahead on BenchLM's BenchAlign leaderboard, 61.31 to 58.43. The biggest single separator in this matchup is ARC-AGI-2, where the scores are 45.1% and 52.9%.
Which is better for reasoning, Gemini 3 Pro Deep Think or GPT-5.2?
GPT-5.2 has the edge for reasoning in this comparison, averaging 52.9 versus 45.1. Inside this category, CritPt is the benchmark that creates the most daylight between them.
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