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Model compare

GPT-5.4 vs O3 Mini

The readout for GPT-5.4 and O3 Mini, before the detailed comparison sheet.

Model A

GPT-5.4

OpenAI

Leading
vs

Model B

O3 Mini

OpenAI

Contender

Key Takeaways

Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

GPT-5.4

GPT-5.4 has the higher weighted result; Model A / B score 65.3 to 34.7.

Evidence depth

98 data points

Includes 14 benchmark rows, 1 audit samples, and 7 provider examples.

Selection signal

Start with GPT-5.4

The charts below split 22 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Select a different model to open a new comparison URL.

Comparison sheet

This report only uses LMSpeed data for GPT-5.4 and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
GPT-5.4
O3 Mini
Overall leaderLeadingContender
Weighted overall score65.3 pts34.7 pts
Benchmark category leads4 categories2 categories
Operational advantagesCheapest input price, First-token latency, Provider coverageAverage speed, Free providers
Context window1.1M tokens200K tokens
Max output128K tokens100K tokens
Modalities

Input

TextImageFile

Output

Text

Input

TextFile

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning
Text inputFile inputText outputTool callingStructured outputsJSON modeReasoning

The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.

Model metadata

Model compare
GPT-5.4
O3 Mini
DeveloperOpenAIOpenAI
ReleasedMar 2026Feb 2025
ParametersNo dataNo data
TokenizerGPTGPT
Knowledge cutoffNo data2023-10-31
OpenRouter IDopenai/gpt-5.4openai/o3-mini
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for GPT-5.4 and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

GPT-5.4

GPT-5.4 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge) and operational dimensions (Cheapest input price, First-token latency, Provider coverage).

O3 Mini

O3 Mini is stronger in benchmark categories (Math, Instruction following) and operational dimensions (Average speed, Free providers).

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage
7 / 8
Model B coverage
6 / 8
Shared
6 shared categories

Avg. score

GPT-5.4

57.2

Avg. score

O3 Mini

48.6

Agents

GPT-5.4 leads by 17.5

GPT-5.457.2
O3 Mini39.7

Coding

GPT-5.4 leads by 22.1

GPT-5.462.6
O3 Mini40.5

Reasoning

GPT-5.4 leads by 6.8

GPT-5.456.2
O3 Mini49.4

Knowledge

GPT-5.4 leads by 12.1

GPT-5.459.9
O3 Mini47.8

Math

O3 Mini leads by 0.9

GPT-5.457.6
O3 Mini58.5

Multilingual

No data

GPT-5.4-
O3 Mini-

Multimodal

GPT-5.4

GPT-5.452.9
O3 Mini-

Instruction following

O3 Mini leads by 1.7

GPT-5.453.9
O3 Mini55.6

Professional benchmark details

Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.

Aggregatereported

BenchLM overall score

SourceGPT-5.4

GPT-5.4

winner

65.0

Rank #29/100 · confidence 3 · eval date 2026-03-05

+14.0

O3 Mini

51.0

Rank #70/100 · confidence 1 · eval date 2025-01-31

Pricingverified

Blended price

SourceGPT-5.4 (Non-reasoning)

GPT-5.4

$5.63/M

Rank #152/178 · confidence 4

+$3.70/M

O3 Mini

winner

$1.93/M

Rank #110/178 · confidence 4

Pricingverified

Output price

SourceGPT-5.4 (Non-reasoning)

GPT-5.4

$15.00/M

Rank #153/178 · confidence 4

+$10.60/M

O3 Mini

winner

$4.40/M

Rank #111/178 · confidence 4

Pricingverified

Input price

SourceGPT-5.4 (Non-reasoning)

GPT-5.4

$2.50/M

Rank #148/178 · confidence 4

+$1.40/M

O3 Mini

winner

$1.10/M

Rank #112/178 · confidence 4

Reasoningverified

HLE

SourceGPT-5.4 (Non-reasoning)

GPT-5.4

winner

11.3%

Rank #108/207 · confidence 4

+3.4%

O3 Mini

7.9%

Rank #126/207 · confidence 4

Reasoningverified

GPQA

SourceGPT-5.4 (Non-reasoning)

GPT-5.4

74.8%

Rank #115/209 · confidence 4

0.0%

O3 Mini

74.8%

Rank #115/209 · confidence 4

Codingreported

AA-SciCode

SourceGPT-5.4

GPT-5.4

winner

56.6

Rank #6/108 · confidence 3 · eval date 2026-03-05

+16.7

O3 Mini

39.9

Rank #70/108 · confidence 1 · eval date 2025-01-31

Codingverified

SciCode

SourceGPT-5.4 (Non-reasoning)

GPT-5.4

winner

47.1%

Rank #33/202 · confidence 4

+7.2%

O3 Mini

39.9%

Rank #83/202 · confidence 4

Codingreported

BenchLM Coding score

SourceGPT-5.4

GPT-5.4

winner

41.9

Rank #67/80 · confidence 3 · eval date 2026-03-05

+20.9

O3 Mini

21.0

Rank #78/80 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-HLE

SourceGPT-5.4

GPT-5.4

winner

43.7

Rank #11/108 · confidence 3 · eval date 2026-03-05

+35.8

O3 Mini

7.9

Rank #83/108 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-GPQA Diamond

SourceGPT-5.4

GPT-5.4

winner

92.0

Rank #17/108 · confidence 3 · eval date 2026-03-05

+17.2

O3 Mini

74.8

Rank #82/108 · confidence 1 · eval date 2025-01-31

Knowledgereported

Artificial Analysis Intelligence Index

SourceGPT-5.4

GPT-5.4

winner

53.1

Rank #17/111 · confidence 3 · eval date 2026-03-05

+33.9

O3 Mini

19.2

Rank #87/111 · confidence 1 · eval date 2025-01-31

Knowledgereported

BenchLM Knowledge score

SourceGPT-5.4

GPT-5.4

winner

77.3

Rank #19/69 · confidence 3 · eval date 2026-03-05

+11.6

O3 Mini

65.7

Rank #40/69 · confidence 1 · eval date 2025-01-31

Agentsreported

τ²-bench results

SourceGPT-5.4

GPT-5.4

winner

98.9

Rank #2/82 · confidence 3 · eval date 2026-03-05

+70.2

O3 Mini

28.7

Rank #72/82 · confidence 1 · eval date 2025-01-31

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
GPT-5.4
O3 Mini
YUNWU APIWinner: GPT-5.4

GPT-5.4

gpt-5.4

Audit score

93

View report
1008486100

O3 Mini

o3-mini

No audit yet

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
GPT-5.4
O3 Mini
丸美小沐25 tests

GPT-5.4

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

66 tok/s / 6491ms

input / output

No data

Sub2API20 tests

GPT-5.4

speed / latency

51 tok/s / 4032ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

QQ Code10 tests

GPT-5.4

speed / latency

55 tok/s / 2903ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

Sub2API10 tests

GPT-5.4

speed / latency

54 tok/s / 1369ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

Sub2API10 tests

GPT-5.4

speed / latency

51 tok/s / 1093ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

APIMart

GPT-5.4

gpt-5.4

speed / latency

No data

input / output

$0/M/$0/M

O3 Mini

o3-mini-medium

speed / latency

No data

input / output

$0.844/M/$3.38/M

兔子API

GPT-5.4

gpt-5.4

speed / latency

No data

input / output

$0/request

O3 Mini

o3-mini-high

speed / latency

No data

input / output

$1.47/request

FAQ

Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Why is this comparison indexable?
It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.