Gemini 2.5 Pro vs GPT-5.4 Pro
Wins 1 of 5 areas
Facts
Wins 4 of 5 areas
Agents · Reasoning · Math · Following instructions
GPT-5.4 Pro is the stronger all-rounder.Gemini 2.5 Pro is cheaper and better at facts.
Scores updated · 16 tests both models report · How we compare
Where each one wins
Tests won in each of the five 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 thinking04GPT-5.4 Pro4 of 4 tests
- MathCompetition and research-level math02GPT-5.4 Pro2 of 2 tests
- AgentsCarrying out multi-step tasks on its own01GPT-5.4 Pro1 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-5.4 Pro1 of 1 test
- FactsGetting facts right instead of making them up20Gemini 2.5 Pro2 of 2 tests
Agents 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 95% 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 GPT-5.4 Pro pulls ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+79.4points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+78.4points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+57.9points ahead
Where Gemini 2.5 Pro pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+9.7points ahead
Every test, side by side
All 16 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGPT-5.4 Pro
- ARC-AGI-2GPT-5.4 Pro by 78.44.983.3+78.4
- CritPtGPT-5.4 Pro by 27.42.630+27.4
- Humanity's Last ExamGPT-5.4 Pro by 24.71842.7+24.7
- GPQA DiamondGPT-5.4 Pro by 10.883.694.4+10.8
FactsGemini 2.5 Pro
- SimpleQA VerifiedGemini 2.5 Pro by 9.75646.3+9.7
- Vectara HHEM hallucination ratelower is betterGemini 2.5 Pro by 1.378.3+1.3
MathGPT-5.4 Pro
- FrontierMath Tier 4GPT-5.4 Pro by 58.5058.5+58.5
- FrontierMath Tiers 1-3 (v2)GPT-5.4 Pro by 57.924.682.5+57.9
Following instructionsGPT-5.4 Pro
- Multi-ChallengeGPT-5.4 Pro by 15.653.669.2+15.6
Other results6 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.
- ARC-AGI-1GPT-5.4 Pro by 57.53794.5+57.5
- frontiermath_tier_4_v1GPT-5.4 Pro by 33.34.237.5+33.3
- HLE (with tools)GPT-5.4 Pro by 30.328.458.7+30.3
- vectara_avg_summary_lengthGPT-5.4 Pro by 42.1 rating points106.4148.5+42.1 rating
- vectara_factual_consistencyGemini 2.5 Pro by 1.39391.7+1.3
- vectara_answer_ratetie99.1100tie
Questions people ask
Which is better, Gemini 2.5 Pro or GPT-5.4 Pro?
GPT-5.4 Pro wins four of the five areas where both have results: agents, reasoning, math and following instructions. Gemini 2.5 Pro wins facts, and costs 95% less.
Which is cheaper?
Gemini 2.5 Pro costs $1.25 per million input tokens and $10.00 per million output tokens; GPT-5.4 Pro costs $30.00 and $180.00. That makes Gemini 2.5 Pro about 95% cheaper for the same work.
How do you compare the two?
We use the 16 benchmark tests both models have published scores on. The verdict counts the 10 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 6 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.