GPT-5.2 Pro is the stronger all-rounder.o4-mini is cheaper.
Scores updated · 9 tests both models report · How we compare
Where each one wins
Tests won in each of the three 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.
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.
o4-mini costs 97% 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-5.2 Pro pulls ahead
- Abstract visual puzzles that people can solveARC-AGI-2+48.1points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+41.1points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+37.9points ahead
Where o4-mini pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 9 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGPT-5.2 Pro
- ARC-AGI-2GPT-5.2 Pro by 48.154.26.1+48.1
- Humanity's Last ExamGPT-5.2 Pro by 20.136.616.5+20.1
- GPQA DiamondGPT-5.2 Pro by 14.893.278.4+14.8
MathGPT-5.2 Pro
- FrontierMath Tier 4GPT-5.2 Pro by 41.1464.9+41.1
- FrontierMath Tiers 1-3 (v2)GPT-5.2 Pro by 37.97436.1+37.9
Other results3 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-5.2 Pro by 31.890.558.7+31.8
- frontiermath_tier_4_v1GPT-5.2 Pro by 2531.36.3+25
- AIME 2025GPT-5.2 Pro by 7.310092.7+7.3
Questions people ask
Which is better, GPT-5.2 Pro or o4-mini?
GPT-5.2 Pro wins all three areas where both have results: agents, reasoning and math. o4-mini wins none, but costs 97% less.
Which is cheaper?
GPT-5.2 Pro costs $21.00 per million input tokens and $168.00 per million output tokens; o4-mini costs $1.10 and $4.40. That makes o4-mini about 97% cheaper for the same work.
How do you compare the two?
We use the 9 benchmark tests both models have published scores on. The verdict counts the 6 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 3 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.