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Model comparison

Gemini 2.5 Pro vs Gemini 3.1 Pro

Data verified

Head-to-head evidence from 21 shared benchmark results across 7 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

57.25/100
Margin
2.0pts
← winning
55.3/100
0 category wins1 category wins

Public leaderboard positions: Gemini 2.5 Pro #70 (Supported); Gemini 3.1 Pro #83 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Gemini 2.5 Pro and Gemini 3.1 Pro share 21 comparable benchmark results. 1 of 8 categories are comparable. 3 results are unique to Gemini 2.5 Pro; 26 to Gemini 3.1 Pro.

Updated July 20, 2026
Shared results
21
Gemini 2.5 Pro only
3
Gemini 3.1 Pro only
26
Comparable categories
1 / 8

Pick Gemini 2.5 Pro if you want the stronger benchmark profile. Gemini 3.1 Pro only becomes the better choice if mathematics is the priority.

Confidence note. This is a partial-evidence comparison with 21 shared benchmark results across 7 evidence categories; 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 2.5 Pro has the cleaner BenchAlign overall profile here, landing at 57.25 versus 55.3. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

Gemini 3.1 Pro is also the more expensive model on tokens at $2.00 input / $12.00 output per 1M tokens, versus $1.25 input / $10.00 output per 1M tokens for Gemini 2.5 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 scores and score margins for Gemini 2.5 Pro and Gemini 3.1 Pro
CategoryGemini 2.5 ProΔGemini 3.1 Pro
MathGemini 2.5 Pro11.6Margin→ 20.2Gemini 3.1 Pro31.8
CodingGemini 2.5 Pro63.8MarginNo overlapGemini 3.1 ProNot measured
ReasoningGemini 2.5 ProNot measuredMarginNo overlapGemini 3.1 Pro77.1
KnowledgeGemini 2.5 Pro27.4MarginNo overlapGemini 3.1 ProNot measured
MultimodalGemini 2.5 ProNot measuredMarginNo overlapGemini 3.1 Pro82.6

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Gemini 2.5 ProB · Gemini 3.1 Pro

  1. FrontierMath v2 (Tiers 1-3)

    Math
    Source ↗
    A 14.138%B 36.900%
    Winner: Gemini 3.1 ProΔ 22.8
    FrontierMath v2 (Tiers 1-3): Gemini 2.5 Pro scored 14.138%; Gemini 3.1 Pro scored 36.900%. Gemini 3.1 Pro wins this benchmark.

  2. FrontierMath v2 (Tier 4)

    Math
    Source ↗
    A 4.167%B 16.700%
    Winner: Gemini 3.1 ProΔ 12.5
    FrontierMath v2 (Tier 4): Gemini 2.5 Pro scored 4.167%; Gemini 3.1 Pro scored 16.700%. Gemini 3.1 Pro wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricGemini 2.5 ProGemini 3.1 ProComparison
Input / output priceUSD per 1M tokensGemini 2.5 Pro$1.25 input / $10 outputGemini 3.1 Pro$2 input / $12 outputGemini 2.5 Pro has the lower combined listed price.
Generation speedtokens per secondGemini 2.5 Pro117 tok/sGemini 3.1 Pro109 tok/sGemini 2.5 Pro has the higher measured throughput.
First-answer latencyseconds to first tokenGemini 2.5 Pro21.19 sGemini 3.1 Pro29.71 sGemini 2.5 Pro reaches the first token sooner.
Context windowmaximum listed tokensGemini 2.5 Pro1MGemini 3.1 Pro1MListed context windows are equal.

Benchmark Deep Dive

Agentic
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
AA Agentic IndexSource 7.1%21.4%Gemini 3.1 Pro leads
τ²-bench resultsSource 54.1%95.6%Gemini 3.1 Pro leads
Gert LabsSource 42.01%56.87%Gemini 3.1 Pro leads
GDPval-AASource 8.3%23.2%Gemini 3.1 Pro leads
GDPval-AASource 665965Gemini 3.1 Pro leads
Claw-EvalSource —57.8%Not comparable
DeepSearchQASource —69.7%Not comparable
APEX-Agents-AASource —32.0%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
Coding
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
SWE-bench VerifiedSource 63.8%—Not comparable
Vibe Code BenchSource 0.40%32.03%Gemini 3.1 Pro leads
AA Coding IndexSource 33.3%68.8%Gemini 3.1 Pro leads
AA-SciCodeSource 42.8%58.9%Gemini 3.1 Pro leads
LiveCodeBench ProSource —82.9%Not comparable
React Native EvalsSource —78.9%Not comparable
Reasoning
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
AA-LCRSource 66.0%72.7%Gemini 3.1 Pro leads
CritPtSource 2.6%17.7%Gemini 3.1 Pro leads
ARC-AGI-2Source —77.1%Not comparable
Knowledge
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
GPQASource 83%—Not comparable
HLESource 18.8%—Not comparable
Artificial Analysis Intelligence IndexSource 25.8%46.5%Gemini 3.1 Pro leads
AA-GPQA DiamondSource 84.4%94.1%Gemini 3.1 Pro leads
AA-HLESource 21.1%44.7%Gemini 3.1 Pro leads
AA-Omniscience IndexSource -14.3%32.9%Gemini 3.1 Pro leads
AA-Omniscience AccuracySource 39.0%55.3%Gemini 3.1 Pro leads
AA-Omniscience Hallucination RateSource 87.4%49.9%Gemini 3.1 Pro leads
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
MathGemini 3.1 Pro wins
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
FrontierMath v2 (Tiers 1-3)Source 14.138%36.900%Gemini 3.1 Pro leads
FrontierMath v2 (Tier 4)Source 4.167%16.700%Gemini 3.1 Pro leads
Multilingual
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
AA Global-MMLU-LiteSource —93.2%Not comparable
Multimodal
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
AA-MMMU-ProSource 74.9%82.4%Gemini 3.1 Pro leads
Design Arena WebsiteSource 11991284Gemini 3.1 Pro leads
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
Inst. Following
BenchmarkGemini 2.5 ProGemini 3.1 ProResult
AA-IFBenchSource 48.7%77.1%Gemini 3.1 Pro leads
Frequently Asked Questions (2)

Which is better, Gemini 2.5 Pro or Gemini 3.1 Pro?

Gemini 2.5 Pro is ahead on BenchLM's BenchAlign leaderboard, 57.25 to 55.3. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 14.138% and 36.900%.

Which is better for math, Gemini 2.5 Pro or Gemini 3.1 Pro?

Gemini 3.1 Pro has the edge for math in this comparison, averaging 31.8 versus 11.6. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.

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Last updated: July 20, 2026

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