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Model comparison

Gemini 2.5 Flash vs Grok 4

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.

48.09/100
Margin
12.3pts
winning →
60.42/100
0 category wins1 category wins

Public leaderboard positions: Gemini 2.5 Flash #130 (Supported); Grok 4 #50 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Gemini 2.5 Flash and Grok 4 share 14 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to Gemini 2.5 Flash; 2 to Grok 4.

Updated July 22, 2026
Shared results
14
Gemini 2.5 Flash only
1
Grok 4 only
2
Comparable categories
1 / 8

Pick Grok 4 if you want the stronger benchmark profile. Gemini 2.5 Flash only becomes the better choice if you need the larger 1M context window.

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

Grok 4 is clearly ahead on the BenchAlign aggregate, 60.42 to 48.09. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Grok 4's sharpest advantage is in mathematics, where it averages 15.3 against 4.7. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 4.844% to 19.655%.

Gemini 2.5 Flash gives you the larger context window at 1M, compared with 128K for Grok 4.

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 Flash and Grok 4
CategoryGemini 2.5 FlashΔGrok 4
MathGemini 2.5 Flash4.7Margin→ 10.6Grok 415.3

Decisive benchmark drivers

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

More
A · Gemini 2.5 FlashB · Grok 4

  1. FrontierMath v2 (Tiers 1-3)

    Math
    Source ↗
    A 4.844%B 19.655%
    Winner: Grok 4Δ 14.8
    FrontierMath v2 (Tiers 1-3): Gemini 2.5 Flash scored 4.844%; Grok 4 scored 19.655%. Grok 4 wins this benchmark.

  2. FrontierMath v2 (Tier 4)

    Math
    Source ↗
    A 4.167%B 2.083%
    Winner: Gemini 2.5 FlashΔ 2.1
    FrontierMath v2 (Tier 4): Gemini 2.5 Flash scored 4.167%; Grok 4 scored 2.083%. Gemini 2.5 Flash wins this benchmark.

Operational comparison

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

MetricGemini 2.5 FlashGrok 4Comparison
Input / output priceUSD per 1M tokensGemini 2.5 Flash$0.3 input / $2.5 outputGrok 4Not availableA complete price comparison is not available.
Generation speedtokens per secondGemini 2.5 Flash221 tok/sGrok 454 tok/sGemini 2.5 Flash has the higher measured throughput.
First-answer latencyseconds to first tokenGemini 2.5 Flash0.50 sGrok 415.60 sGemini 2.5 Flash reaches the first token sooner.
Context windowmaximum listed tokensGemini 2.5 Flash1MGrok 4128KGemini 2.5 Flash lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkGemini 2.5 FlashGrok 4Result
τ²-bench resultsSource 14.9%74.9%Grok 4 leads
Gert LabsSource —42.34%Not comparable
Coding
BenchmarkGemini 2.5 FlashGrok 4Result
AA-SciCodeSource 29.1%45.7%Grok 4 leads
React Native EvalsSource —72.6%Not comparable
Reasoning
BenchmarkGemini 2.5 FlashGrok 4Result
AA-LCRSource 45.9%68.0%Grok 4 leads
CritPtSource 1.4%2.0%Grok 4 leads
Knowledge
BenchmarkGemini 2.5 FlashGrok 4Result
Artificial Analysis Intelligence IndexSource 14.1%33.3%Grok 4 leads
AA-GPQA DiamondSource 68.3%87.7%Grok 4 leads
AA-HLESource 5.1%23.9%Grok 4 leads
AA-Omniscience IndexSource -42.0%3.8%Grok 4 leads
AA-Omniscience AccuracySource 26.5%41.4%Grok 4 leads
AA-Omniscience Hallucination RateSource 93.3%64.2%Grok 4 leads
MathGrok 4 wins
BenchmarkGemini 2.5 FlashGrok 4Result
FrontierMath v2 (Tiers 1-3)Source 4.844%19.655%Grok 4 leads
FrontierMath v2 (Tier 4)Source 4.167%2.083%Gemini 2.5 Flash leads
Multimodal
BenchmarkGemini 2.5 FlashGrok 4Result
AA-MMMU-ProSource 65.5%68.8%Grok 4 leads
Design Arena WebsiteSource 1145—Not comparable
Inst. Following
BenchmarkGemini 2.5 FlashGrok 4Result
AA-IFBenchSource 39.0%53.7%Grok 4 leads
Frequently Asked Questions (2)

Which is better, Gemini 2.5 Flash or Grok 4?

Grok 4 is ahead on BenchLM's BenchAlign leaderboard, 60.42 to 48.09. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 4.844% and 19.655%.

Which is better for math, Gemini 2.5 Flash or Grok 4?

Grok 4 has the edge for math in this comparison, averaging 15.3 versus 4.7. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.

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