Gemini 2.5 Pro vs Grok 4
Wins 2 of 7 areas
Images and charts · Long documents
Wins 5 of 7 areas
Coding · Agents · Reasoning · Facts · Following instructions
Grok 4 is the stronger all-rounder.Gemini 2.5 Pro is cheaper and better at images and charts.
Scores updated · 34 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking03Grok 43 of 4 tests · 1 tie
- FactsGetting facts right instead of making them up12Grok 42 of 3 tests
- CodingWriting and fixing software01Grok 41 of 2 tests · 1 tie
- AgentsCarrying out multi-step tasks on its own01Grok 41 of 1 test
- Following instructionsDoing exactly what it is asked01Grok 41 of 1 test
- Images and chartsUnderstanding pictures, charts and video20Gemini 2.5 Pro2 of 2 tests
- Long documentsFinding answers in very long texts10Gemini 2.5 Pro1 of 1 test
Agents, long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Gemini 2.5 Pro costs 38% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Grok 4 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+26.4points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+11.4points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+11points ahead
Where Gemini 2.5 Pro pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+8.1points ahead
- Harder college exam questions with imagesMMMU-Pro+6.1points ahead
- Reasons across sets of long documentsAA-LCR+1points ahead
Every test, side by side
All 34 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGrok 4
- ARC-AGI-2Grok 4 by 114.915.9+11
- Humanity's Last ExamGrok 4 by 8.71826.7+8.7
- GPQA DiamondGrok 4 by 4.183.687.7+4.1
- CritPttie2.62tie
FactsGrok 4
- AA-Omniscience · Non-hallucinationGrok 4 by 26.49.135.5+26.4
- SimpleQA VerifiedGemini 2.5 Pro by 8.15647.9+8.1
- AA-Omniscience · AccuracyGrok 4 by 1.43940.5+1.4
Images and chartsGemini 2.5 Pro
- MMMU-ProGemini 2.5 Pro by 6.174.968.8+6.1
- LMArena · VisionGemini 2.5 Pro by 53 rating points12631210+53 rating
Other results20 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- AA Agentic IndexGrok 4 by 383.541.5+38
- ARC-AGI-1Grok 4 by 29.73766.7+29.7
- AIR-Bench 2024Gemini 2.5 Pro by 29.273.644.4+29.2
- HarmBenchGemini 2.5 Pro by 25.765.439.7+25.7
- HMMT 2025Grok 4 by 24.365.790+24.3
- τ²-Bench Telecom (AA run)Grok 4 by 20.854.174.9+20.8
- imo_2025Gemini 2.5 Pro by 19.731.611.9+19.7
- AA-OmniscienceGrok 4 by 18.4-16.42.1+18.4
- AIME 2025Grok 4 by 8.78391.7+8.7
- HMMT Nov. 2025Grok 4 by 8.38088.3+8.3
- AA IntelligenceGrok 4 by 7.51522.5+7.5
- matharena_visual_math_overallGemini 2.5 Pro by 7.277.270+7.2
- Artificial Analysis Coding IndexGemini 2.5 Pro by 6.246.740.5+6.2
- LiveCodeBenchGrok 4 by 4.874.279+4.8
- simple_safety_testsGemini 2.5 Pro by 4.89792.2+4.8
- anthropic_red_teamGemini 2.5 Pro by 3.899.595.7+3.8
- Aider-PolyglotGrok 4 by 3.176.579.6+3.1
- bbqGemini 2.5 Pro by 2.796.493.7+2.7
- frontiermath_tier_4_v1Gemini 2.5 Pro by 2.14.22.1+2.1
- XSTestGemini 2.5 Pro by 2.198.796.6+2.1
Questions people ask
Which is better, Gemini 2.5 Pro or Grok 4?
Grok 4 wins five of the seven areas where both have results: coding, agents, reasoning, facts and following instructions. Gemini 2.5 Pro wins images and charts and long documents, and costs 38% less.
Which is better for coding?
Grok 4. It wins 1 of the 2 coding tests both models report; Gemini 2.5 Pro wins none, and 1 is a tie.
Which is cheaper?
Gemini 2.5 Pro costs $1.25 per million input tokens and $10.00 per million output tokens; Grok 4 costs $3.00 and $15.00. That makes Gemini 2.5 Pro about 38% cheaper for the same work.
How do you compare the two?
We use the 34 benchmark tests both models have published scores on. The verdict counts the 14 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 20 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.