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Gemini 2.5 Pro vs Grok 4.5

Grok 4.5 leads Gemini 2.5 Pro on coding, 58.6 to 19.1 on the Vibe Coding Index, and Grok 4.5 costs 1.7x less per output token ($6.00 vs $10.00 per million). Updated October 22, 2026; 73 benchmarks have a result for both.

Replace Gemini 2.5 Pro Replace Grok 4.5
Gemini 2.5 ProGoogle
Coding
19.1
Overall
41.8
Output $/M
$10.00
22
Grok 4.5xAI
Coding
58.6
Overall
62.1
Output $/M
$6.00
51
vs boards won of 73 shared

Gemini 2.5 Pro or Grok 4.5: which to pick

Pick Grok 4.5 for coding: it scores 58.6 on the Vibe Coding Index against 19.1 for Gemini 2.5 Pro.

Pick Gemini 2.5 Pro for a larger context window (1.05M against 500K tokens) and work measured by WeirdML or MortgageTax (Vals AI), where it leads.

Model AGemini 2.5 ProGoogle19.1/1003 independent benchmarks$0.64 per solved taskModel BGrok 4.5xAI58.6/1006 independent benchmarks$0.62 per solved task
Shared results
73
Gemini 2.5 Pro only
17
Grok 4.5 only
50
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Gemini 2.5 Pro 19.1 from 3 benchmarks, Grok 4.5 58.6 from 6 benchmarks.
Widest category
Coding, 31.0 points apart on average over 10 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Gemini 2.5 Pro 0.4% against Grok 4.5 69.0%, 68.6 points apart on a 0 to 100 scale.
Output price
Gemini 2.5 Pro $10.00 against Grok 4.5 $6.00 per million output tokens, 1.7x apart.
Context window
Gemini 2.5 Pro takes 1.05M tokens, Grok 4.5 500K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryGemini 2.5 ProBarsGrok 4.5Ties
Coding19
Intelligence02
Agentic work02
Reasoning011
Math05
Knowledge62
Web design06
General1514
All shared boards2251
CodingLike-for-likeSix of these boards feed the Vibe Coding Index19
Coding benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
SWE-bench Verified53.6%Not measuredOnly Gemini 2.5 Pro measured
LiveBench codingNot measured94.3%Only Grok 4.5 measured
LMArena WebDev12261553Grok 4.5
AA Coding Index33.372.4Grok 4.5
LiveCodeBench (Vals AI)Not measured87.3%Only Grok 4.5 measured
SWE-bench Verified (Vals AI)54.4%86.6%Grok 4.5
Terminal-Bench 4 (Vals AI)Not measured8.6%Only Grok 4.5 measured
Vibe Code Bench (Vals AI)0.4%69.0%Grok 4.5
Code migration (Vals AI)Not measured36.6%Only Grok 4.5 measured
ProgramBench (Vals AI)Not measured0.0%Only Grok 4.5 measured
IOI (Vals AI)Not measured40.6%Only Grok 4.5 measured
Terminal-Bench 2.1 (Vals AI)Not measured67.8%Only Grok 4.5 measured
SkillsBench (Vals AI)Not measured66.0%Only Grok 4.5 measured
CyberBench (Vals AI)Not measured71.0%Only Grok 4.5 measured
LiveCodeBench (Artificial Analysis run)80.1%Not measuredOnly Gemini 2.5 Pro measured
SciCode46.3%55.0%Grok 4.5
Terminal-Bench Hard (Artificial Analysis run)26.5%Not measuredOnly Gemini 2.5 Pro measured
Terminal-Bench32.6%Not measuredOnly Gemini 2.5 Pro measured
FrontierCodeNot measured42.4%Only Grok 4.5 measured
GSO-Bench3.9%Not measuredOnly Gemini 2.5 Pro measured
WeirdML54.0%46.4%Gemini 2.5 Pro
ALE-BenchNot measured1309.3Only Grok 4.5 measured
LMArena Text: coding14521474Grok 4.5
LMArena Text: software and IT14591471Grok 4.5
LMArena WebDev: ReactNot measured1556Only Grok 4.5 measured
LMArena WebDev: HTML12351567Grok 4.5
LMArena WebDev: from an image12851562Grok 4.5
SciCodeNot measured6.5%Only Grok 4.5 measured
Neither model has a result on the other 11 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
AA Intelligence Index16.138.8Grok 4.5
Epoch Capabilities Index145.1154.1Grok 4.5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index02
Agentic work benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
AA Agentic Index1.641.2Grok 4.5
Design Arena: agents building web appsNot measured1218Only Grok 4.5 measured
Design Arena: agents building full-stack appsNot measured1249Only Grok 4.5 measured
Design Arena: agents building mobile appsNot measured1220Only Grok 4.5 measured
Design Arena: agents building Android appsNot measured1236Only Grok 4.5 measured
Design Arena: agents building Godot gamesNot measured1229Only Grok 4.5 measured
Design Arena: agents building gamesNot measured1236Only Grok 4.5 measured
Design Arena: HTML slidesNot measured1205Only Grok 4.5 measured
Design Arena: PowerPoint slidesNot measured1230Only Grok 4.5 measured
LiveBench researchNot measured85.9%Only Grok 4.5 measured
LiveBench browserNot measured44.0%Only Grok 4.5 measured
LiveBench long agenticNot measured27.9%Only Grok 4.5 measured
SREBench (Vals AI)Not measured0.8%Only Grok 4.5 measured
Finance Agent (Vals AI)Not measured48.4%Only Grok 4.5 measured
Tax Agent Bench (Vals AI)Not measured24.9%Only Grok 4.5 measured
Legal Research Bench (Vals AI)Not measured38.0%Only Grok 4.5 measured
Excel Modeling Benchmark (Vals AI)Not measured52.9%Only Grok 4.5 measured
Time Horizon Index (Vals AI)Not measured6.3%Only Grok 4.5 measured
τ²-Bench Telecom54.1%Not measuredOnly Gemini 2.5 Pro measured
APEX-AgentsNot measured56.2%Only Grok 4.5 measured
GDPval23.3%Not measuredOnly Gemini 2.5 Pro measured
DeepResearch Bench41.5%Not measuredOnly Gemini 2.5 Pro measured
PostTrainBenchNot measured23.4%Only Grok 4.5 measured
Vending-Bench 2$574$3,887Grok 4.5
LMArena SearchNot measured1216Only Grok 4.5 measured
BrowseComp-Plus29.5%Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index011
Reasoning benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
GPQA DiamondNot measured92.9%Only Grok 4.5 measured
LiveBench reasoningNot measured87.2%Only Grok 4.5 measured
MMMU Pro (Vals AI)Not measured61.8%Only Grok 4.5 measured
GPQA Diamond (Artificial Analysis run)84.4%93.1%Grok 4.5
Humanity's Last Exam (Artificial Analysis run)22.5%42.7%Grok 4.5
GPQA Diamond (Epoch AI run)85.3%93.4%Grok 4.5
ARC-AGI41.0%87.2%Grok 4.5
ARC-AGI-24.9%52.6%Grok 4.5
SimpleBenchNot measured70.0%Only Grok 4.5 measured
Chess puzzlesNot measured35.0%Only Grok 4.5 measured
LMArena Text: hard prompts14551462Grok 4.5
LMArena Text: expert14521465Grok 4.5
LMArena Text: hard prompts in English14531464Grok 4.5
LMArena Vision: diagrams12741304Grok 4.5
LMArena Vision: homework12811295Grok 4.5
Kagi LLM Benchmark70.3%83.5%Grok 4.5
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index05
Math benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
AA Math Index87.7Not measuredOnly Gemini 2.5 Pro measured
AIME 2025 (Artificial Analysis run)87.7%Not measuredOnly Gemini 2.5 Pro measured
OTIS Mock AIME84.7%97.8%Grok 4.5
FrontierMath, tiers 1 to 324.6%57.2%Grok 4.5
FrontierMath, tier 40.0%24.4%Grok 4.5
ProofBenchNot measured31.0%Only Grok 4.5 measured
LMArena Text: math14501460Grok 4.5
LMArena Text: mathematical work14541482Grok 4.5
Neither model has a result on the other 5 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index62
Knowledge benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
MMLU ProNot measured89.2%Only Grok 4.5 measured
LegalBench (Vals AI)Not measured86.0%Only Grok 4.5 measured
CaseLaw (Vals AI)63.9%Not measuredOnly Gemini 2.5 Pro measured
CorpFin (Vals AI)60.8%67.4%Grok 4.5
TaxEval (Vals AI)Not measured71.7%Only Grok 4.5 measured
MortgageTax (Vals AI)68.9%61.8%Gemini 2.5 Pro
MedCode (Vals AI)50.6%43.3%Gemini 2.5 Pro
MMLU Pro (Artificial Analysis run)86.2%Not measuredOnly Gemini 2.5 Pro measured
SimpleQA VerifiedNot measured48.3%Only Grok 4.5 measured
LMArena Text: science14801464Gemini 2.5 Pro
LMArena Text: medicine and healthcare14761440Gemini 2.5 Pro
LMArena Text: legal and government14801463Gemini 2.5 Pro
LMArena Text: business and finance14391441Grok 4.5
FACTS Benchmark Suite61.5%50.2%Gemini 2.5 Pro
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
Design Arena: websites11671281Grok 4.5
Design Arena: UI components11371280Grok 4.5
Design Arena: game dev11111264Grok 4.5
Design Arena: data viz12221266Grok 4.5
Design Arena: 3D10801257Grok 4.5
Design Arena: all code categories11521275Grok 4.5
Design Arena: SVGNot measured1215Only Grok 4.5 measured
Design Arena: ASCII artNot measured1256Only Grok 4.5 measured
LiveBench designNot measured78.1%Only Grok 4.5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index1514
General benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
LiveBench data analysisNot measured73.0%Only Grok 4.5 measured
SAGE (Vals AI)41.9%35.0%Gemini 2.5 Pro
MedScribe (Vals AI)73.5%86.9%Grok 4.5
Vals Multimodal IndexNot measured63.4%Only Grok 4.5 measured
IFBench48.7%Not measuredOnly Gemini 2.5 Pro measured
Long context reasoning (AA-LCR)69.0%79.3%Grok 4.5
DTBench82.4%96.5%Grok 4.5
LMCA34.8%45.2%Grok 4.5
Creative writing (Lech Mazur)83.8%Not measuredOnly Gemini 2.5 Pro measured
Surface Evolver BenchNot measured74.4%Only Grok 4.5 measured
Furniture assemblyNot measured22.5%Only Grok 4.5 measured
LMArena Text14581448Gemini 2.5 Pro
LMArena Text: instruction following14371445Grok 4.5
LMArena Text: creative writing14541442Gemini 2.5 Pro
LMArena Vision12631287Grok 4.5
LMArena Text: English14581453Gemini 2.5 Pro
LMArena Text: non-English14521440Gemini 2.5 Pro
LMArena Text: Chinese15071495Gemini 2.5 Pro
LMArena Text: German14871448Gemini 2.5 Pro
LMArena Text: Japanese14611430Gemini 2.5 Pro
LMArena Text: Korean14341406Gemini 2.5 Pro
LMArena Text: French14731457Gemini 2.5 Pro
LMArena Text: Spanish14741451Gemini 2.5 Pro
LMArena Text: Russian14611449Gemini 2.5 Pro
LMArena Text: Polish14791432Gemini 2.5 Pro
LMArena Text: multi-turn14531456Grok 4.5
LMArena Text: longer queries14491462Grok 4.5
LMArena Text: writing and language14541445Gemini 2.5 Pro
LMArena Text: entertainment and media14411434Gemini 2.5 Pro
LMArena Vision: English12611285Grok 4.5
LMArena Vision: Chinese13001345Grok 4.5
LMArena Vision: reading text12701293Grok 4.5
LMArena Vision: humor12621276Grok 4.5
LMArena Vision: captioning1304Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: recognizing things1283Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: creative writing12651293Grok 4.5
LMArena Document14211452Grok 4.5
Neither model has a result on the other 9 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 2.5 Pro and Grok 4.5
BenchmarkGemini 2.5 ProGrok 4.5Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Gemini 2.5 Pro$0.0063Fits in one request
Grok 4.5$0.0050Fits in one request

Grok 4.5 costs less

Repository review

50K input + 3K output tokens

Gemini 2.5 Pro$0.092Fits in one request
Grok 4.5$0.118Fits in one request

Gemini 2.5 Pro costs less

Agent loop

200K input + 10K output tokens

Gemini 2.5 Pro$0.350Fits in one request
Grok 4.5$0.460Fits in one request

Gemini 2.5 Pro costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Gemini 2.5 Pro and Grok 4.5
SpecificationGoogle Gemini 2.5 ProSpaceXAI Grok 4.5
MakerGooglexAI
WeightsNo public weights listedNo public weights listed
ReleasedJune 17, 2025July 8, 2026
Context window1.05M500K
Input $/Mtok$1.25$2.00
Output $/Mtok$10.00$6.00
Coding index19.158.6
Independent measurements behind it36
Cost per solved task$0.64$0.62
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 2.5 Pro better than Grok 4.5 for coding?

Pick Grok 4.5 for coding: it scores 58.6 on the Vibe Coding Index against 19.1 for Gemini 2.5 Pro. Pick Gemini 2.5 Pro for a larger context window (1.05M against 500K tokens) and work measured by WeirdML or MortgageTax (Vals AI), where it leads.

Which is cheaper, Gemini 2.5 Pro or Grok 4.5?

Gemini 2.5 Pro costs $1.25 per million input tokens and $10.00 per million output tokens; Grok 4.5 costs $2.00 and $6.00. Per solved SWE-bench Verified task, Gemini 2.5 Pro costs $0.64 and Grok 4.5 $0.62.

Which has the bigger context window, Gemini 2.5 Pro or Grok 4.5?

Gemini 2.5 Pro, with 1.05M tokens against 500K.

How many benchmarks is the Gemini 2.5 Pro vs Grok 4.5 comparison based on?

73 benchmarks have a result for both models as of October 22, 2026. Gemini 2.5 Pro's coding index rests on 3 independent benchmarks and Grok 4.5's on 6. Where only one model has a result, the page says so instead of naming a winner.

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