Noometry

Model comparison

Gemini 2.5 Pro vs Grok 4.3

Gemini 2.5 Pro is the stronger model overall, scoring 44.9 to 43.6 on the Noometry Index. Grok 4.3 costs 2.2× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

Last verified . 34 shared benchmarks.

Gemini 2.5 Pro Google

44.9

Rank #67 Confirmed

Grok 4.3 xAI

43.6

Rank #80 Confirmed

Summary

  • They share 34 benchmarks with published results for both. Gemini 2.5 Pro scores higher in 8 categories and Grok 4.3 in 2 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Gemini 2.5 Pro leads 59.7 to 42.5.
  • The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 24.6% for Gemini 2.5 Pro and 42.8% for Grok 4.3.
  • Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.25 / $10 for Gemini 2.5 Pro.
  • Gemini 2.5 Pro accepts more context: 1.05M tokens versus 1M.

Side by side

Gemini 2.5 ProGrok 4.3
ProviderGooglexAI
Noometry Index44.943.6
Released2025-03-252026-04-17
WeightsProprietaryProprietary
Context window1.05M1M
Max output66K30K
Input $ / M tokens$1.25$1.25
Output $ / M tokens$10$2.50
Results tracked7840

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Category by category

Coding Gemini 2.5 Pro leads

Gemini 2.5 Pro: 42.8 (#86), Grok 4.3: 41.3 (#117)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena WebDev12271357
SciCode42.8%47.3%
WeirdML54%49.9%
LMArena Coding14521415
ALE-Bench785.52944.17
SWE-bench Verified57.6%—
SWE-bench Verified (bash only)53.6%—
Aider Polyglot83.1%—
GSO3.9%—
LiveBench Coding85.9%—
CadEval64%—
AlgoTune1.51—

Agentic & Tool Use Gemini 2.5 Pro leads

Gemini 2.5 Pro: 29.1 (#81), Grok 4.3: 27.6 (#93)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena Search11421165
Vending-Bench 2573.6435.26
Terminal-Bench32.6%—
GDPval23.3%—
Remote Labor Index0.8%—
TheAgentCompany30.3%—
τ²-bench Banking13.7%—
DeepResearch Bench42.8%—
BALROG43.3%—
GDP.pdf—8%
METR Time Horizons55.4%—

Reasoning Grok 4.3 leads

Gemini 2.5 Pro: 28.8 (#85), Grok 4.3: 34.9 (#60)

BenchmarkGemini 2.5 ProGrok 4.3
CritPt2%8%
Chess Puzzles20%25%
LMArena Hard Prompts14551397
DTBench82.4%90.7%
LMCA34.8%38.3%
Epoch Capabilities Index145.32149.13
ForecastBench61.360.3
ARC-AGI-24.9%—
SimpleBench62.4%—
Kagi LLM Benchmark70.3%—
NYT Connections (extended)—55.2%
ARC-AGI-141%—
EnigmaEval5.6%—
LiveBench Reasoning89.8%—
LiveBench Data Analysis79.9%—
LiveBench82.3%—

Math Grok 4.3 leads

Gemini 2.5 Pro: 31.9 (#191), Grok 4.3: 45.8 (#60)

BenchmarkGemini 2.5 ProGrok 4.3
FrontierMath (Tiers 1-3)24.6%42.8%
FrontierMath Tier 40%14.6%
OTIS Mock AIME 2024-202584.7%93.3%
LMArena Math14501388
ProofBench—11%
Omni-MATH41.6%—
LiveBench Math90.2%—
MATH Level 595.9%—
FrontierMath (Feb 2025 set)14.1%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Gemini 2.5 Pro leads

Gemini 2.5 Pro: 55.8 (#41), Grok 4.3: 52.5 (#57)

BenchmarkGemini 2.5 ProGrok 4.3
GPQA Diamond85.3%88.8%
LMArena Expert14521385
Humanity's Last Exam21.6%—
SimpleQA Verified—33.2%
MMLU-Pro86.3%—
Confabulations10.6%—
Vectara Hallucination Rate7%—
GPQA (HELM)74.9%—

Multimodal Gemini 2.5 Pro leads

Gemini 2.5 Pro: 44.5 (#16), Grok 4.3: 31.6 (#96)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena Vision12631231
GeoBench86%—
VPCT48%—
Blueprint-Bench 2—0%
LMArena Document1421—
SpatialViz-Bench44.7%—

Multilingual Gemini 2.5 Pro leads

Gemini 2.5 Pro: 55.5 (#30), Grok 4.3: 50.7 (#114)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena Non-English14521385
LMArena Chinese15071423
LMArena French14731412
LMArena German14871395
LMArena Japanese14621379
LMArena Korean14351357
LMArena Russian14601399
LMArena Spanish14731402

Instruction Following Gemini 2.5 Pro leads

Gemini 2.5 Pro: 75.2 (#71), Grok 4.3: 72.3 (#135)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena Instruction Following14361366
LiveBench Instruction Following80.6%—
IFEval84%—

Long Context Gemini 2.5 Pro leads

Gemini 2.5 Pro: 59.7 (#5), Grok 4.3: 42.5 (#118)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena Longer Query14491393
Fiction.LiveBench91.7%—

Writing & Preference Gemini 2.5 Pro leads

Gemini 2.5 Pro: 63.9 (#60), Grok 4.3: 58.6 (#112)

BenchmarkGemini 2.5 ProGrok 4.3
LMArena Text14581397
LMArena Creative Writing14531380
LMArena Multi-Turn14531406
Short-Story Creative Writing83.8%—
EQ-Bench Creative Writing1421—
WildBench85.7%—
EQ-Bench 4—1075
LiveBench Language67.8%—

Frequently asked questions

Is Gemini 2.5 Pro better than Grok 4.3?

Gemini 2.5 Pro is the stronger model overall, scoring 44.9 to 43.6 on the Noometry Index. Grok 4.3 costs 2.2× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

Which is cheaper, Gemini 2.5 Pro or Grok 4.3?

Grok 4.3 is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.

Is Gemini 2.5 Pro or Grok 4.3 better for coding?

Gemini 2.5 Pro scores higher on coding benchmarks: 42.8 versus 41.3 in the Noometry coding category.

Which has the bigger context window?

Gemini 2.5 Pro does, with 1.05M tokens against 1M.

How many benchmarks do Gemini 2.5 Pro and Grok 4.3 share?

34 benchmarks have published results for both models. Gemini 2.5 Pro has 78 scored results on Noometry and Grok 4.3 has 40.

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