Gemini 2.5 Pro vs GPT-4o
Wins 6 of 7 areas
Coding · Reasoning · Facts · Images and charts · Long documents · Following instructions
Wins 0 of 7 areas
—
Gemini 2.5 Pro is the stronger all-rounder.
Scores updated · 50 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.
- Images and chartsUnderstanding pictures, charts and video50Gemini 2.5 Pro5 of 5 tests
- ReasoningHard problems that need careful thinking40Gemini 2.5 Pro4 of 4 tests
- CodingWriting and fixing software30Gemini 2.5 Pro3 of 3 tests
- FactsGetting facts right instead of making them up31Gemini 2.5 Pro3 of 4 tests
- Long documentsFinding answers in very long texts20Gemini 2.5 Pro2 of 2 tests
- Following instructionsDoing exactly what it is asked20Gemini 2.5 Pro2 of 2 tests
- AgentsCarrying out multi-step tasks on its own00Even0 each · 1 tie
Agents rests on a single test.
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 44% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Gemini 2.5 Pro pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+31points ahead
- Fixes real GitHub issues in Python projectsSWE-bench Verified+30points ahead
- Short factual questions, answered correctlySimpleQA Verified+30points ahead
Where GPT-4o pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+53points ahead
Every test, side by side
All 50 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 2.5 Pro
- SWE-bench VerifiedGemini 2.5 Pro by 3063.233.2+30
- Terminal-Bench HardGemini 2.5 Pro by 18.226.58.3+18.2
- SciCodeGemini 2.5 Pro by 1346.333.3+13
ReasoningGemini 2.5 Pro
- GPQA DiamondGemini 2.5 Pro by 3183.652.6+31
- Humanity's Last ExamGemini 2.5 Pro by 16.2181.8+16.2
- ARC-AGI-2Gemini 2.5 Pro by 4.94.90+4.9
- CritPtGemini 2.5 Pro by 2.62.60+2.6
FactsGemini 2.5 Pro
- AA-Omniscience · Non-hallucinationGPT-4o by 539.162.1+53
- SimpleQA VerifiedGemini 2.5 Pro by 305626+30
- AA-Omniscience · AccuracyGemini 2.5 Pro by 15.43923.7+15.4
- Vectara HHEM hallucination ratelower is betterGemini 2.5 Pro by 2.679.6+2.6
Images and chartsGemini 2.5 Pro
Long documentsGemini 2.5 Pro
- AA-LCRGemini 2.5 Pro by 136956+13
- LongBench v2Gemini 2.5 Pro by 10.758.848.1+10.7
Following instructionsGemini 2.5 Pro
- Multi-ChallengeGemini 2.5 Pro by 13.353.640.3+13.3
- IFBenchGemini 2.5 Pro by 12.748.736+12.7
Other results29 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.
- AIME 2024Gemini 2.5 Pro by 82.7929.3+82.7
- AIME 2025Gemini 2.5 Pro by 71.38311.7+71.3
- livecodebench_mediumGemini 2.5 Pro by 58.590.632.1+58.5
- livecodebench_hardGemini 2.5 Pro by 54.959.44.5+54.9
- Aider-PolyglotGemini 2.5 Pro by 45.876.530.7+45.8
- MATH-VisionGemini 2.5 Pro by 42.973.330.4+42.9
- LiveCodeBenchGemini 2.5 Pro by 35.974.238.3+35.9
- ARC-AGI-1Gemini 2.5 Pro by 32.5374.5+32.5
- τ²-Bench Telecom (AA run)Gemini 2.5 Pro by 25.254.128.9+25.2
- MATH-500 (EM)Gemini 2.5 Pro by 24.298.874.6+24.2
- Artificial Analysis Coding IndexGemini 2.5 Pro by 22.546.724.2+22.5
- VideoMMMUGemini 2.5 Pro by 22.483.661.2+22.4
- HarmBenchGPT-4o by 17.565.482.9+17.5
- livecodebench_easyGemini 2.5 Pro by 16.398.882.5+16.3
- SimpleQAGemini 2.5 Pro by 12.650.838.2+12.6
- MMLU-ProGemini 2.5 Pro by 11.38674.7+11.3
- AIR-Bench 2024Gemini 2.5 Pro by 11.273.662.4+11.2
- AA IntelligenceGemini 2.5 Pro by 7.7157.3+7.7
- TAU-bench (airline)Gemini 2.5 Pro by 7.25042.8+7.2
- TAU-bench (retail)Gemini 2.5 Pro by 6.76760.3+6.7
- AA-OmniscienceGPT-4o by 5.8-16.4-10.5+5.8
- vectara_answer_rateGemini 2.5 Pro by 5.399.193.8+5.3
- AA Agentic IndexGPT-4o by 4.93.58.4+4.9
- vectara_factual_consistencyGemini 2.5 Pro by 2.69390.4+2.6
- vectara_avg_summary_lengthGemini 2.5 Pro by 19.8 rating points106.486.6+19.8 rating
- simple_safety_testsGPT-4o by 1.59798.5+1.5
- XSTestGemini 2.5 Pro by 1.498.797.3+1.4
- bbqGemini 2.5 Pro by 1.396.495.1+1.3
- anthropic_red_teamtie99.599.1tie
Questions people ask
Which is better, Gemini 2.5 Pro or GPT-4o?
Gemini 2.5 Pro wins six of the seven areas where both have results: coding, reasoning, facts, images and charts, long documents and following instructions. GPT-4o wins none. They are level on agents.
Which is better for coding?
Gemini 2.5 Pro. It wins 3 of the 3 coding tests both models report; GPT-4o wins none.
Which is cheaper?
Gemini 2.5 Pro costs $1.25 per million input tokens and $10.00 per million output tokens; GPT-4o costs $5.00 and $15.00. That makes Gemini 2.5 Pro about 44% cheaper for the same work.
How do you compare the two?
We use the 50 benchmark tests both models have published scores on. The verdict counts the 21 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 29 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.