Model comparison

GPT-5.4 vs o3

Data verified July 20, 2026

Head-to-head evidence from 15 shared benchmark results across 7 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

GPT-5.4

OpenAI

74.24/100

Margin

26.3pts

← winning

OpenAI

47.89/100

1 category wins0 category wins

Public leaderboard positions: GPT-5.4 #8 (Supported); o3 #131 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. GPT-5.4 and o3 share 15 comparable benchmark results. 1 of 8 categories are comparable. 37 results are unique to GPT-5.4; 1 to o3.

Updated July 20, 2026

Shared results: 15
GPT-5.4 only: 37
o3 only: 1
Comparable categories: 1 / 8

Pick GPT-5.4 if you want the stronger benchmark profile. o3 only becomes the better choice if you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 15 shared benchmark results across 7 evidence categories; 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-5.4 is clearly ahead on the BenchAlign aggregate, 74.24 to 47.89. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

GPT-5.4's sharpest advantage is in mathematics, where it averages 42.5 against 14.5. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 47.600% to 18.685%.

GPT-5.4 is also the more expensive model on tokens at $2.50 input / $15.00 output per 1M tokens, versus $2.00 input / $8.00 output per 1M tokens for o3. GPT-5.4 gives you the larger context window at 1.05M, compared with 200K for o3.

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-5.4 and o3
Category	GPT-5.4	Δ	o3
Math	GPT-5.442.5	Margin← 28.0	o314.5
Agentic	GPT-5.477.2	MarginNo overlap	o3Not measured
Coding	GPT-5.457.7	MarginNo overlap	o3Not measured
Knowledge	GPT-5.457.6	MarginNo overlap	o3Not measured
Multimodal	GPT-5.473.2	MarginNo overlap	o3Not measured

Decisive benchmark drivers

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

A · GPT-5.4B · o3

FrontierMath v2 (Tiers 1-3)
Math
Source ↗
A 47.600%B 18.685%
Winner: GPT-5.4Δ 28.9
FrontierMath v2 (Tiers 1-3): GPT-5.4 scored 47.600%; o3 scored 18.685%. GPT-5.4 wins this benchmark.
FrontierMath v2 (Tier 4)
Math
Source ↗
A 27.100%B 2.083%
Winner: GPT-5.4Δ 25
FrontierMath v2 (Tier 4): GPT-5.4 scored 27.100%; o3 scored 2.083%. GPT-5.4 wins this benchmark.

Operational comparison

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

Metric	GPT-5.4	o3	Comparison
Input / output priceUSD per 1M tokens	GPT-5.4$2.5 input / $15 output	o3$2 input / $8 output	o3 has the lower combined listed price.
Generation speedtokens per second	GPT-5.474 tok/s	o3118 tok/s	o3 has the higher measured throughput.
First-answer latencyseconds to first token	GPT-5.4151.79 s	o35.38 s	o3 reaches the first token sooner.
Context windowmaximum listed tokens	GPT-5.41.05M	o3200K	GPT-5.4 lists the larger context window.

Benchmark Deep Dive

Agentic

17 benchmarks

Benchmark	GPT-5.4	o3	Result
Terminal-Bench 2.0Source	75.1%	—	Not comparable
CyberGymSource	79.0%	—	Not comparable
BrowseCompSource	82.7%	—	Not comparable
OSWorld-VerifiedSource	75%	—	Not comparable
MCP AtlasSource	70.6%	—	Not comparable
ToolathlonSource	54.6%	—	Not comparable
τ²-bench resultsSource	87.1%	80.7%	GPT-5.4 leads
Claw-EvalSource	60.3%	—	Not comparable
DeepSearchQASource	73.6%	—	Not comparable
AA Agentic IndexSource	41.1%	—	Not comparable
APEX-Agents-AASource	33.3%	—	Not comparable
GDPval-AASource	44.7%	—	Not comparable
GDPval-AASource	1395	—	Not comparable
Gert LabsSource	64.89%	—	Not comparable
ResearchClawBenchSource	15.3%	—	Not comparable
JobBenchSource	38.9%	—	Not comparable
ExploitGymSource	6.0%	—	Not comparable

Coding

6 benchmarks

Benchmark	GPT-5.4	o3	Result
LiveCodeBench ProSource	87.5%	—	Not comparable
SWE-bench ProSource	57.7%	—	Not comparable
React Native EvalsSource	85.3%	—	Not comparable
Vibe Code BenchSource	67.42%	—	Not comparable
AA Coding IndexSource	71.0%	—	Not comparable
AA-SciCodeSource	56.6%	41.0%	GPT-5.4 leads

Reasoning

2 benchmarks

Benchmark	GPT-5.4	o3	Result
AA-LCRSource	74.0%	69.3%	GPT-5.4 leads
CritPtSource	23.4%	1.1%	GPT-5.4 leads

Knowledge

13 benchmarks

Benchmark	GPT-5.4	o3	Result
GPQASource	92.8%	—	Not comparable
HLESource	52.1%	—	Not comparable
HLE w/o toolsSource	39.8%	—	Not comparable
GPQA-DSource	92.8%	—	Not comparable
HealthBench HardSource	40.1%	—	Not comparable
MedXpertQA (Text)Source	59.6%	—	Not comparable
Artificial Analysis Intelligence IndexSource	51.4%	30.4%	GPT-5.4 leads
AA-GPQA DiamondSource	92.0%	82.7%	GPT-5.4 leads
AA-HLESource	41.6%	20.0%	GPT-5.4 leads
AA-Omniscience IndexSource	5.7%	-15.3%	GPT-5.4 leads
AA-Omniscience AccuracySource	50.0%	38.4%	GPT-5.4 leads
AA-Omniscience Hallucination RateSource	88.6%	87.1%	o3 leads
HealthBench ProfessionalSource	48.1%	—	Not comparable

MathGPT-5.4 wins

3 benchmarks

Benchmark	GPT-5.4	o3	Result
FrontierMath v2 (Tiers 1-3)Source	47.600%	18.685%	GPT-5.4 leads
FrontierMath v2 (Tier 4)Source	27.100%	2.083%	GPT-5.4 leads
AA MATH-500Source	—	99.2%	Not comparable

Multimodal

11 benchmarks

Benchmark	GPT-5.4	o3	Result
MMMU-ProSource	81.2%	—	Not comparable
OfficeQA ProSource	53.2%	—	Not comparable
MMMU-Pro w/ PythonSource	82.1%	—	Not comparable
CharXivSource	82.8%	—	Not comparable
ERQASource	65.4%	—	Not comparable
SimpleVQASource	61.1%	—	Not comparable
ScreenSpot ProSource	85.4%	—	Not comparable
ZeroBenchSource	41.0%	—	Not comparable
MedXpertQA (MM)Source	77.1%	—	Not comparable
AA-MMMU-ProSource	78.4%	70.1%	GPT-5.4 leads
Design Arena WebsiteSource	1252	1069	GPT-5.4 leads

Inst. Following

1 benchmarks

Benchmark	GPT-5.4	o3	Result
AA-IFBenchSource	73.9%	71.4%	GPT-5.4 leads

Frequently Asked Questions (2)

Which is better, GPT-5.4 or o3?

GPT-5.4 is ahead on BenchLM's BenchAlign leaderboard, 74.24 to 47.89. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 47.600% and 18.685%.

Which is better for math, GPT-5.4 or o3?

GPT-5.4 has the edge for math in this comparison, averaging 42.5 versus 14.5. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.

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