GPT-5.4 vs o4-mini
Wins 8 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
Wins 0 of 8 areas
—
GPT-5.4 is the stronger all-rounder.o4-mini is cheaper.
Scores updated · 29 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. 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 thinking40GPT-5.44 of 4 tests
- Images and chartsUnderstanding pictures, charts and video30GPT-5.43 of 3 tests
- FactsGetting facts right instead of making them up31GPT-5.43 of 4 tests
- CodingWriting and fixing software20GPT-5.42 of 2 tests
- AgentsCarrying out multi-step tasks on its own20GPT-5.42 of 2 tests
- MathCompetition and research-level math20GPT-5.42 of 2 tests
- Long documentsFinding answers in very long texts10GPT-5.41 of 1 test
- Following instructionsDoing exactly what it is asked10GPT-5.41 of 1 test
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.
o4-mini costs 69% 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 pulls ahead
- Abstract visual puzzles that people can solveARC-AGI-2+67.2points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+44.1points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+42.5points ahead
Where o4-mini pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+11.2points ahead
Every test, side by side
All 29 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.4
- Terminal-Bench HardGPT-5.4 by 42.457.615.2+42.4
- SciCodeGPT-5.4 by 10.156.646.5+10.1
AgentsGPT-5.4
- BrowseCompGPT-5.4 by 31.282.751.5+31.2
- GDPValGPT-5.4 by 11.937.325.4+11.9
ReasoningGPT-5.4
- ARC-AGI-2GPT-5.4 by 67.273.36.1+67.2
- Humanity's Last ExamGPT-5.4 by 27.243.716.5+27.2
- CritPtGPT-5.4 by 22.823.40.6+22.8
- GPQA DiamondGPT-5.4 by 13.69278.4+13.6
FactsGPT-5.4
- SimpleQA VerifiedGPT-5.4 by 26.345.118.8+26.3
- AA-Omniscience · AccuracyGPT-5.4 by 26.150.924.8+26.1
- Vectara HHEM hallucination ratelower is betterGPT-5.4 by 11.6718.6+11.6
- AA-Omniscience · Non-hallucinationo4-mini by 11.28.319.5+11.2
Images and chartsGPT-5.4
- LMArena · VisionGPT-5.4 by 109 rating points13031194+109 rating
- CharXiv (RQ)GPT-5.4 by 10.882.872+10.8
- MMMU-ProGPT-5.4 by 9.278.469.2+9.2
MathGPT-5.4
- FrontierMath Tier 4GPT-5.4 by 44.1494.9+44.1
- FrontierMath Tiers 1-3 (v2)GPT-5.4 by 42.578.636.1+42.5
Other results10 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.
- Artificial Analysis Coding IndexGPT-5.4 by 45.571.125.6+45.5
- AA-OmniscienceGPT-5.4 by 41.55.8-35.7+41.5
- ARC-AGI-1GPT-5.4 by 3593.758.7+35
- τ²-Bench Telecom (AA run)GPT-5.4 by 31.587.155.6+31.5
- AA IntelligenceGPT-5.4 by 22.33916.7+22.3
- frontiermath_tier_4_v1GPT-5.4 by 20.827.16.3+20.8
- vectara_factual_consistencyGPT-5.4 by 11.69381.4+11.6
- AA Agentic IndexGPT-5.4 by 8.144.236.1+8.1
- vectara_avg_summary_lengtho4-mini by 46 rating points81.7127.7+46 rating
- vectara_answer_ratetie99.999.2tie
Questions people ask
Which is better, GPT-5.4 or o4-mini?
GPT-5.4 wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. o4-mini wins none, but costs 69% less.
Which is better for coding?
GPT-5.4. It wins 2 of the 2 coding tests both models report; o4-mini wins none.
Which is cheaper?
GPT-5.4 costs $2.50 per million input tokens and $15.00 per million output tokens; o4-mini costs $1.10 and $4.40. That makes o4-mini about 69% cheaper for the same work.
How do you compare the two?
We use the 29 benchmark tests both models have published scores on. The verdict counts the 19 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 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.