Model comparison
Gemini 3.1 Pro vs Gemini 3 Pro Deep Think
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 3.1 Pro #83 (Estimated); Gemini 3 Pro Deep Think #41 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemini 3.1 Pro and Gemini 3 Pro Deep Think share 2 comparable benchmark results. 1 of 8 categories are comparable. 45 results are unique to Gemini 3.1 Pro; 0 to Gemini 3 Pro Deep Think.
Updated July 20, 2026- Shared results
- 2
- Gemini 3.1 Pro only
- 45
- Gemini 3 Pro Deep Think only
- 0
- Comparable categories
- 1 / 8
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. Gemini 3.1 Pro only becomes the better choice if reasoning is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
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 is clearly ahead on the BenchAlign aggregate, 61.31 to 55.3. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 3 Pro Deep Think is the reasoning model in the pair, while Gemini 3.1 Pro is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 1M for Gemini 3.1 Pro.
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 3.1 Pro | Δ | Gemini 3 Pro Deep Think |
|---|---|---|---|
| Reasoning | Gemini 3.1 Pro77.1 | Margin← 32.0 | Gemini 3 Pro Deep Think45.1 |
| Math | Gemini 3.1 Pro31.8 | MarginNo overlap | Gemini 3 Pro Deep ThinkNot measured |
| Multimodal | Gemini 3.1 Pro82.6 | MarginNo overlap | Gemini 3 Pro Deep ThinkNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
ARC-AGI-2
ReasoningA 77.1%B 45.1%Winner: Gemini 3.1 ProΔ 32ARC-AGI-2: Gemini 3.1 Pro scored 77.1%; Gemini 3 Pro Deep Think scored 45.1%. Gemini 3.1 Pro wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3.1 Pro | Gemini 3 Pro Deep Think | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3.1 Pro$2 input / $12 output | Gemini 3 Pro Deep ThinkNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Gemini 3.1 Pro109 tok/s | Gemini 3 Pro Deep ThinkNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 3.1 Pro29.71 s | Gemini 3 Pro Deep ThinkNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 3.1 Pro1M | Gemini 3 Pro Deep Think2M | Gemini 3 Pro Deep Think lists the larger context window. |
Benchmark Deep Dive
Agentic16 benchmarks
| Benchmark | Gemini 3.1 Pro | Gemini 3 Pro Deep Think | Result |
|---|---|---|---|
| Claw-EvalSource | 57.8% | — | Not comparable |
| DeepSearchQASource | 69.7% | — | Not comparable |
| τ²-bench resultsSource | 95.6% | — | Not comparable |
| AA Agentic IndexSource | 21.4% | — | Not comparable |
| APEX-Agents-AASource | 32.0% | — | Not comparable |
| GDPval-AASource | 23.2% | — | Not comparable |
| GDPval-AASource | 965 | — | Not comparable |
| Gert LabsSource | 56.87% | — | Not comparable |
| ResearchClawBenchSource | 13.3% | — | Not comparable |
| AA AutomationBenchSource | 37.5% | — | Not comparable |
| AA EnterpriseOps-GymSource | 42.2% | — | Not comparable |
| AA Harvey LABSource | 0.0% | — | Not comparable |
| AA ITBenchSource | 30.3% | — | Not comparable |
| AA Tau3 BankingSource | 16.5% | — | Not comparable |
| terminalBenchHardSource | 53.8% | — | Not comparable |
| aaTerminalBench21Source | 73.8% | — | Not comparable |
Coding5 benchmarks
ReasoningGemini 3.1 Pro wins3 benchmarks
Knowledge10 benchmarks
| Benchmark | Gemini 3.1 Pro | Gemini 3 Pro Deep Think | Result |
|---|---|---|---|
| GPQA-DSource | 94.3% | — | Not comparable |
| HLE w/o toolsSource | 45.4% | — | Not comparable |
| HealthBench HardSource | 20.6% | — | Not comparable |
| MedXpertQA (Text)Source | 71.5% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 46.5% | — | Not comparable |
| AA-GPQA DiamondSource | 94.1% | — | Not comparable |
| AA-HLESource | 44.7% | — | Not comparable |
| AA-Omniscience IndexSource | 32.9% | — | Not comparable |
| AA-Omniscience AccuracySource | 55.3% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 49.9% | — | Not comparable |
Math2 benchmarks
Multilingual1 benchmarks
| Benchmark | Gemini 3.1 Pro | Gemini 3 Pro Deep Think | Result |
|---|---|---|---|
| AA Global-MMLU-LiteSource | 93.2% | — | Not comparable |
Multimodal9 benchmarks
| Benchmark | Gemini 3.1 Pro | Gemini 3 Pro Deep Think | Result |
|---|---|---|---|
| MMMU-ProSource | 83.9% | — | Not comparable |
| CharXivSource | 80.2% | — | Not comparable |
| ERQASource | 69.4% | — | Not comparable |
| SimpleVQASource | 72.4% | — | Not comparable |
| ScreenSpot ProSource | 84.4% | — | Not comparable |
| ZeroBenchSource | 29.0% | — | Not comparable |
| MedXpertQA (MM)Source | 81.3% | — | Not comparable |
| AA-MMMU-ProSource | 82.4% | — | Not comparable |
| Design Arena WebsiteSource | 1284 | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Gemini 3.1 Pro | Gemini 3 Pro Deep Think | Result |
|---|---|---|---|
| AA-IFBenchSource | 77.1% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Gemini 3.1 Pro or Gemini 3 Pro Deep Think?
Gemini 3 Pro Deep Think is ahead on BenchLM's BenchAlign leaderboard, 61.31 to 55.3. The biggest single separator in this matchup is ARC-AGI-2, where the scores are 77.1% and 45.1%.
Which is better for reasoning, Gemini 3.1 Pro or Gemini 3 Pro Deep Think?
Gemini 3.1 Pro has the edge for reasoning in this comparison, averaging 77.1 versus 45.1. Inside this category, ARC-AGI-2 is the benchmark that creates the most daylight between them.
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