Model comparison

GPT-5.2 vs o4-mini (high)

Data verified July 20, 2026

Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.

GPT-5.2

OpenAI

58.43/100

Margin

8.5pts

← winning

o4-mini (high)

OpenAI

49.98/100

1 category wins0 category wins

Public leaderboard positions: GPT-5.2 #64 (Estimated); o4-mini (high) #118 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. GPT-5.2 and o4-mini (high) share 2 comparable benchmark results. 1 of 8 categories are comparable. 26 results are unique to GPT-5.2; 0 to o4-mini (high).

Updated July 20, 2026

Shared results: 2
GPT-5.2 only: 26
o4-mini (high) only: 0
Comparable categories: 1 / 8

Pick GPT-5.2 if you want the stronger benchmark profile. o4-mini (high) only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

GPT-5.2 is clearly ahead on the BenchAlign aggregate, 58.43 to 49.98. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

GPT-5.2's sharpest advantage is in mathematics, where it averages 35.2 against 20.2. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 40.700% to 24.828%.

GPT-5.2 gives you the larger context window at 400K, compared with 200K for o4-mini (high).

Category breakdown

Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.

Category scores and score margins for GPT-5.2 and o4-mini (high)
Category	GPT-5.2	Δ	o4-mini (high)
Math	GPT-5.235.2	Margin← 15.0	o4-mini (high)20.2
Agentic	GPT-5.255.7	MarginNo overlap	o4-mini (high)Not measured
Coding	GPT-5.270.6	MarginNo overlap	o4-mini (high)Not measured
Reasoning	GPT-5.252.9	MarginNo overlap	o4-mini (high)Not measured
Knowledge	GPT-5.292.4	MarginNo overlap	o4-mini (high)Not measured
Multimodal	GPT-5.280.4	MarginNo overlap	o4-mini (high)Not measured

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

A · GPT-5.2B · o4-mini (high)

FrontierMath v2 (Tiers 1-3)
Math
Source ↗
A 40.700%B 24.828%
Winner: GPT-5.2Δ 15.9
FrontierMath v2 (Tiers 1-3): GPT-5.2 scored 40.700%; o4-mini (high) scored 24.828%. GPT-5.2 wins this benchmark.
FrontierMath v2 (Tier 4)
Math
Source ↗
A 18.800%B 6.250%
Winner: GPT-5.2Δ 12.6
FrontierMath v2 (Tier 4): GPT-5.2 scored 18.800%; o4-mini (high) scored 6.250%. GPT-5.2 wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

Metric	GPT-5.2	o4-mini (high)	Comparison
Input / output priceUSD per 1M tokens	GPT-5.2$1.75 input / $14 output	o4-mini (high)Not available	A complete price comparison is not available.
Generation speedtokens per second	GPT-5.273 tok/s	o4-mini (high)161 tok/s	o4-mini (high) has the higher measured throughput.
First-answer latencyseconds to first token	GPT-5.2130.34 s	o4-mini (high)21.94 s	o4-mini (high) reaches the first token sooner.
Context windowmaximum listed tokens	GPT-5.2400K	o4-mini (high)200K	GPT-5.2 lists the larger context window.

Benchmark Deep Dive

Agentic

5 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
BrowseCompSource	65.8%	—	Not comparable
OSWorld-VerifiedSource	47.3%	—	Not comparable
τ²-bench resultsSource	84.8%	—	Not comparable
Gert LabsSource	46.54%	—	Not comparable
JobBenchSource	34.3%	—	Not comparable

Coding

4 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
SWE-bench VerifiedSource	80%	—	Not comparable
SWE-bench ProSource	55.6%	—	Not comparable
Vibe Code BenchSource	53.50%	—	Not comparable
AA-SciCodeSource	52.1%	—	Not comparable

Reasoning

3 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
ARC-AGI-2Source	52.9%	—	Not comparable
AA-LCRSource	72.7%	—	Not comparable
CritPtSource	11.6%	—	Not comparable

Knowledge

7 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
GPQASource	92.4%	—	Not comparable
Artificial Analysis Intelligence IndexSource	42.2%	—	Not comparable
AA-GPQA DiamondSource	90.3%	—	Not comparable
AA-HLESource	35.4%	—	Not comparable
AA-Omniscience IndexSource	-1.0%	—	Not comparable
AA-Omniscience AccuracySource	43.8%	—	Not comparable
AA-Omniscience Hallucination RateSource	79.7%	—	Not comparable

MathGPT-5.2 wins

3 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
AA AIME 2025Source	99.0%	—	Not comparable
FrontierMath v2 (Tiers 1-3)Source	40.700%	24.828%	GPT-5.2 leads
FrontierMath v2 (Tier 4)Source	18.800%	6.250%	GPT-5.2 leads

Multimodal

5 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
MMMU-ProSource	79.5%	—	Not comparable
MathVisionSource	83.0%	—	Not comparable
CharXivSource	82.1%	—	Not comparable
V*Source	75.9%	—	Not comparable
Design Arena WebsiteSource	1227	—	Not comparable

Inst. Following

1 benchmarks

Benchmark	GPT-5.2	o4-mini (high)	Result
AA-IFBenchSource	75.4%	—	Not comparable

Frequently Asked Questions (2)

Which is better, GPT-5.2 or o4-mini (high)?

GPT-5.2 is ahead on BenchLM's BenchAlign leaderboard, 58.43 to 49.98. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 40.700% and 24.828%.

Which is better for math, GPT-5.2 or o4-mini (high)?

GPT-5.2 has the edge for math in this comparison, averaging 35.2 versus 20.2. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.

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Last updated: July 20, 2026

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