Gemini 2.5 Pro vs GPT-4.5 Preview
Wins 4 of 4 areas
Coding · Reasoning · Images and charts · Following instructions
Wins 0 of 4 areas
—
Gemini 2.5 Pro is the stronger all-rounder.
Scores updated · 19 tests both models report · How we compare
Where each one wins
Tests won in each of the four 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 video30Gemini 2.5 Pro3 of 3 tests
- ReasoningHard problems that need careful thinking20Gemini 2.5 Pro2 of 2 tests
- CodingWriting and fixing software10Gemini 2.5 Pro1 of 1 test
- Following instructionsDoing exactly what it is asked10Gemini 2.5 Pro1 of 1 test
Coding 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.
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
- Fixes real GitHub issues in Python projectsSWE-bench Verified+25.2points ahead
- Common-sense trick questionsSimpleBench+17.1points ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+14.1points ahead
Where GPT-4.5 Preview pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 19 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGemini 2.5 Pro
- SimpleBenchGemini 2.5 Pro by 17.151.634.5+17.1
- GPQA DiamondGemini 2.5 Pro by 14.183.669.5+14.1
Images and chartsGemini 2.5 Pro
- MathVistaGemini 2.5 Pro by 11.683.972.3+11.6
- LMArena · VisionGemini 2.5 Pro by 68 rating points12631195+68 rating
- MMMUGemini 2.5 Pro by 4.479.675.2+4.4
Following instructionsGemini 2.5 Pro
- Multi-ChallengeGemini 2.5 Pro by 9.853.643.8+9.8
Other results12 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.
- Aider-PolyglotGemini 2.5 Pro by 31.676.544.9+31.6
- HarmBenchGPT-4.5 Preview by 30.465.495.8+30.4
- ARC-AGI-1Gemini 2.5 Pro by 26.73710.3+26.7
- SimpleQAGPT-4.5 Preview by 11.750.862.5+11.7
- AA IntelligenceGemini 2.5 Pro by 5.4159.6+5.4
- bbqGemini 2.5 Pro by 4.496.492+4.4
- XSTestGemini 2.5 Pro by 3.698.795.1+3.6
- simple_safety_testsGPT-4.5 Preview by 397100+3
- TAU-bench (retail)GPT-4.5 Preview by 1.46768.4+1.4
- AIR-Bench 2024tie73.674.2tie
- anthropic_red_teamtie99.599.4tie
- TAU-bench (airline)tie5050tie
Questions people ask
Which is better, Gemini 2.5 Pro or GPT-4.5 Preview?
Gemini 2.5 Pro wins all four areas where both have results: coding, reasoning, images and charts and following instructions. GPT-4.5 Preview wins none.
Which is better for coding?
Gemini 2.5 Pro. It wins the one coding test both models report.
How do you compare the two?
We use the 19 benchmark tests both models have published scores on. The verdict counts the 7 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 12 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.