Skip to main content
BenchLM
Advertise

Model comparison

Gemini 2.5 Pro vs Grok Code Fast 1

Data verified

Head-to-head evidence from 12 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

57.25/100
Margin
18.6pts
← winning
38.64/100
0 category wins1 category wins

Public leaderboard positions: Gemini 2.5 Pro #70 (Supported); Grok Code Fast 1 #180 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Gemini 2.5 Pro and Grok Code Fast 1 share 12 comparable benchmark results. 1 of 8 categories are comparable. 12 results are unique to Gemini 2.5 Pro; 0 to Grok Code Fast 1.

Updated July 20, 2026
Shared results
12
Gemini 2.5 Pro only
12
Grok Code Fast 1 only
0
Comparable categories
1 / 8

Pick Gemini 2.5 Pro if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 5 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 is clearly ahead on the BenchAlign aggregate, 57.25 to 38.64. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Gemini 2.5 Pro is also the more expensive model on tokens at $1.25 input / $10.00 output per 1M tokens, versus $0.20 input / $1.50 output per 1M tokens for Grok Code Fast 1. That is roughly 6.7x on output cost alone. Gemini 2.5 Pro gives you the larger context window at 1M, compared with 256K for Grok Code Fast 1.

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 Grok Code Fast 1
CategoryGemini 2.5 ProΔGrok Code Fast 1
CodingGemini 2.5 Pro63.8Margin→ 7.0Grok Code Fast 170.8
KnowledgeGemini 2.5 Pro27.4MarginNo overlapGrok Code Fast 1Not measured
MathGemini 2.5 Pro11.6MarginNo overlapGrok Code Fast 1Not measured

Decisive benchmark drivers

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

More
A · Gemini 2.5 ProB · Grok Code Fast 1

  1. SWE-bench Verified

    Coding
    Source ↗
    A 63.8%B 70.8%
    Winner: Grok Code Fast 1Δ 7
    SWE-bench Verified: Gemini 2.5 Pro scored 63.8%; Grok Code Fast 1 scored 70.8%. Grok Code Fast 1 wins this benchmark.

Operational comparison

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

MetricGemini 2.5 ProGrok Code Fast 1Comparison
Input / output priceUSD per 1M tokensGemini 2.5 Pro$1.25 input / $10 outputGrok Code Fast 1$0.2 input / $1.5 outputGrok Code Fast 1 has the lower combined listed price.
Generation speedtokens per secondGemini 2.5 Pro117 tok/sGrok Code Fast 1172 tok/sGrok Code Fast 1 has the higher measured throughput.
First-answer latencyseconds to first tokenGemini 2.5 Pro21.19 sGrok Code Fast 12.81 sGrok Code Fast 1 reaches the first token sooner.
Context windowmaximum listed tokensGemini 2.5 Pro1MGrok Code Fast 1256KGemini 2.5 Pro lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
AA Agentic IndexSource 7.1%—Not comparable
τ²-bench resultsSource 54.1%75.7%Grok Code Fast 1 leads
Gert LabsSource 42.01%—Not comparable
GDPval-AASource 8.3%—Not comparable
GDPval-AASource 665—Not comparable
CodingGrok Code Fast 1 wins
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
SWE-bench VerifiedSource 63.8%70.8%Grok Code Fast 1 leads
Vibe Code BenchSource 0.40%—Not comparable
AA Coding IndexSource 33.3%—Not comparable
AA-SciCodeSource 42.8%36.2%Gemini 2.5 Pro leads
Reasoning
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
AA-LCRSource 66.0%48.3%Gemini 2.5 Pro leads
CritPtSource 2.6%0.0%Gemini 2.5 Pro leads
Knowledge
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
GPQASource 83%—Not comparable
HLESource 18.8%—Not comparable
Artificial Analysis Intelligence IndexSource 25.8%21.6%Gemini 2.5 Pro leads
AA-GPQA DiamondSource 84.4%72.7%Gemini 2.5 Pro leads
AA-HLESource 21.1%7.5%Gemini 2.5 Pro leads
AA-Omniscience IndexSource -14.3%-36.0%Gemini 2.5 Pro leads
AA-Omniscience AccuracySource 39.0%23.8%Gemini 2.5 Pro leads
AA-Omniscience Hallucination RateSource 87.4%78.5%Grok Code Fast 1 leads
Math
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
FrontierMath v2 (Tiers 1-3)Source 14.138%—Not comparable
FrontierMath v2 (Tier 4)Source 4.167%—Not comparable
Multimodal
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
AA-MMMU-ProSource 74.9%—Not comparable
Design Arena WebsiteSource 1199—Not comparable
Inst. Following
BenchmarkGemini 2.5 ProGrok Code Fast 1Result
AA-IFBenchSource 48.7%41.4%Gemini 2.5 Pro leads
Frequently Asked Questions (2)

Which is better, Gemini 2.5 Pro or Grok Code Fast 1?

Gemini 2.5 Pro is ahead on BenchLM's BenchAlign leaderboard, 57.25 to 38.64. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 63.8% and 70.8%.

Which is better for coding, Gemini 2.5 Pro or Grok Code Fast 1?

Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 63.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.

Related Comparisons

Explore More

Google Compare Pricing Methodology Find Your Best LLM Overall Rankings
Last updated: July 20, 2026

Choose a model with this week’s evidence

Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.

One email each week. Unsubscribe anytime.