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Model comparison

Gemini 3.1 Pro vs Kimi K2

Data verified

Head-to-head evidence from 14 shared benchmark results across 7 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

55.3/100
Margin
28.1pts
← winning
Kimi K2
Moonshot AI
27.19/100
1 category wins0 category wins

Public leaderboard positions: Gemini 3.1 Pro #83 (Estimated); Kimi K2 #189 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Gemini 3.1 Pro and Kimi K2 share 14 comparable benchmark results. 1 of 8 categories are comparable. 33 results are unique to Gemini 3.1 Pro; 0 to Kimi K2.

Updated July 20, 2026
Shared results
14
Gemini 3.1 Pro only
33
Kimi K2 only
0
Comparable categories
1 / 8

Pick Gemini 3.1 Pro if you want the stronger benchmark profile. Kimi K2 only becomes the better choice if you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 14 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 3.1 Pro is clearly ahead on the BenchAlign aggregate, 55.3 to 27.19. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Gemini 3.1 Pro's sharpest advantage is in mathematics, where it averages 31.8 against 16.1. The single biggest benchmark swing on the page is FrontierMath v2 (Tier 4), 16.700% to 0.000%.

Gemini 3.1 Pro is also the more expensive model on tokens at $2.00 input / $12.00 output per 1M tokens, versus $0.60 input / $2.50 output per 1M tokens for Kimi K2. That is roughly 4.8x on output cost alone. Gemini 3.1 Pro gives you the larger context window at 1M, compared with 128K for Kimi K2.

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 3.1 Pro and Kimi K2
CategoryGemini 3.1 ProΔKimi K2
MathGemini 3.1 Pro31.8Margin← 15.7Kimi K216.1
ReasoningGemini 3.1 Pro77.1MarginNo overlapKimi K2Not measured
MultimodalGemini 3.1 Pro82.6MarginNo overlapKimi K2Not measured

Decisive benchmark drivers

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

More
A · Gemini 3.1 ProB · Kimi K2

  1. FrontierMath v2 (Tier 4)

    Math
    Source ↗
    A 16.700%B 0.000%
    Winner: Gemini 3.1 ProΔ 16.7
    FrontierMath v2 (Tier 4): Gemini 3.1 Pro scored 16.700%; Kimi K2 scored 0.000%. Gemini 3.1 Pro wins this benchmark.

  2. FrontierMath v2 (Tiers 1-3)

    Math
    Source ↗
    A 36.900%B 21.404%
    Winner: Gemini 3.1 ProΔ 15.5
    FrontierMath v2 (Tiers 1-3): Gemini 3.1 Pro scored 36.900%; Kimi K2 scored 21.404%. 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 3.1 ProKimi K2Comparison
Input / output priceUSD per 1M tokensGemini 3.1 Pro$2 input / $12 outputKimi K2$0.6 input / $2.5 outputKimi K2 has the lower combined listed price.
Generation speedtokens per secondGemini 3.1 Pro109 tok/sKimi K243 tok/sGemini 3.1 Pro has the higher measured throughput.
First-answer latencyseconds to first tokenGemini 3.1 Pro29.71 sKimi K21.51 sKimi K2 reaches the first token sooner.
Context windowmaximum listed tokensGemini 3.1 Pro1MKimi K2128KGemini 3.1 Pro lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkGemini 3.1 ProKimi K2Result
Claw-EvalSource 57.8%—Not comparable
DeepSearchQASource 69.7%—Not comparable
τ²-bench resultsSource 95.6%61.1%Gemini 3.1 Pro leads
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
Coding
BenchmarkGemini 3.1 ProKimi K2Result
LiveCodeBench ProSource 82.9%—Not comparable
React Native EvalsSource 78.9%—Not comparable
Vibe Code BenchSource 32.03%—Not comparable
AA Coding IndexSource 68.8%—Not comparable
AA-SciCodeSource 58.9%34.5%Gemini 3.1 Pro leads
Reasoning
BenchmarkGemini 3.1 ProKimi K2Result
ARC-AGI-2Source 77.1%—Not comparable
AA-LCRSource 72.7%51.0%Gemini 3.1 Pro leads
CritPtSource 17.7%0.0%Gemini 3.1 Pro leads
Knowledge
BenchmarkGemini 3.1 ProKimi K2Result
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%19.4%Gemini 3.1 Pro leads
AA-GPQA DiamondSource 94.1%76.6%Gemini 3.1 Pro leads
AA-HLESource 44.7%7.0%Gemini 3.1 Pro leads
AA-Omniscience IndexSource 32.9%-27.5%Gemini 3.1 Pro leads
AA-Omniscience AccuracySource 55.3%26.8%Gemini 3.1 Pro leads
AA-Omniscience Hallucination RateSource 49.9%74.2%Gemini 3.1 Pro leads
MathGemini 3.1 Pro wins
BenchmarkGemini 3.1 ProKimi K2Result
FrontierMath v2 (Tiers 1-3)Source 36.900%21.404%Gemini 3.1 Pro leads
FrontierMath v2 (Tier 4)Source 16.700%0.000%Gemini 3.1 Pro leads
Multilingual
BenchmarkGemini 3.1 ProKimi K2Result
AA Global-MMLU-LiteSource 93.2%—Not comparable
Multimodal
BenchmarkGemini 3.1 ProKimi K2Result
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 12841083Gemini 3.1 Pro leads
Inst. Following
BenchmarkGemini 3.1 ProKimi K2Result
AA-IFBenchSource 77.1%41.5%Gemini 3.1 Pro leads
Frequently Asked Questions (2)

Which is better, Gemini 3.1 Pro or Kimi K2?

Gemini 3.1 Pro is ahead on BenchLM's BenchAlign leaderboard, 55.3 to 27.19. The biggest single separator in this matchup is FrontierMath v2 (Tier 4), where the scores are 16.700% and 0.000%.

Which is better for math, Gemini 3.1 Pro or Kimi K2?

Gemini 3.1 Pro has the edge for math in this comparison, averaging 31.8 versus 16.1. Inside this category, FrontierMath v2 (Tier 4) is the benchmark that creates the most daylight between them.

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Last updated: July 20, 2026

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