Sponsored byFusecodeEnterprise coding API for Claude Code, Codex, and model workflows.
LogoLMSpeed
Back to models

Model compare

GPT-5.4 Mini vs O3 Mini

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

Model A

GPT-5.4 Mini

OpenAI

Leading
vs

Model B

O3 Mini

OpenAI

Contender

Key Takeaways

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

Decision read

GPT-5.4 Mini

GPT-5.4 Mini has the higher weighted result; Model A / B score 60 to 40.

Evidence depth

94 data points

Includes 14 benchmark rows, 0 audit samples, and 9 provider examples.

Selection signal

Start with GPT-5.4 Mini

The charts below split 23 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 Mini and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
GPT-5.4 Mini
O3 Mini
Overall leaderLeadingContender
Weighted overall score60.0 pts40.0 pts
Benchmark category leads3 categories3 categories
Operational advantagesCheapest input price, Average speed, First-token latency, Free providers, Provider coverageNo data
Context window400K tokens200K tokens
Max output128K tokens100K tokens
Modalities

Input

FileImageText

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 Mini
O3 Mini
DeveloperOpenAIOpenAI
ReleasedMar 2026Feb 2025
ParametersNo dataNo data
TokenizerGPTGPT
Knowledge cutoff2025-08-312023-10-31
OpenRouter IDopenai/gpt-5.4-miniopenai/o3-mini
ReferencesNo dataNo data

When to choose each model

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

GPT-5.4 Mini

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

O3 Mini

O3 Mini leads these benchmark categories: Knowledge, Math, Instruction following.

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 Mini

51.4

Avg. score

O3 Mini

48.5

Agents

GPT-5.4 Mini leads by 11.2

GPT-5.4 Mini50.9
O3 Mini39.7

Coding

GPT-5.4 Mini leads by 16.9

GPT-5.4 Mini57.2
O3 Mini40.3

Reasoning

GPT-5.4 Mini leads by 6.2

GPT-5.4 Mini55.5
O3 Mini49.3

Knowledge

O3 Mini leads by 1.8

GPT-5.4 Mini46
O3 Mini47.8

Math

O3 Mini leads by 8.8

GPT-5.4 Mini49.7
O3 Mini58.5

Multilingual

No data

GPT-5.4 Mini-
O3 Mini-

Multimodal

GPT-5.4 Mini

GPT-5.4 Mini47.1
O3 Mini-

Instruction following

O3 Mini leads by 2.0

GPT-5.4 Mini53.6
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 mini

GPT-5.4 Mini

winner

55.0

Rank #57/102 · confidence 3 · eval date 2026-03-17

+4.0

O3 Mini

51.0

Rank #68/102 · confidence 1 · eval date 2025-01-31

Pricingverified

Input price

SourceGPT-5.4 mini (medium)

GPT-5.4 Mini

winner

$0.750/M

Rank #105/184 · confidence 4

+$0.350/M

O3 Mini

$1.10/M

Rank #116/184 · confidence 4

Pricingverified

Blended price

SourceGPT-5.4 mini (medium)

GPT-5.4 Mini

winner

$1.69/M

Rank #112/184 · confidence 4

+$0.237/M

O3 Mini

$1.93/M

Rank #117/184 · confidence 4

Pricingverified

Output price

SourceGPT-5.4 mini (medium)

GPT-5.4 Mini

$4.50/M

Rank #124/184 · confidence 4

+$0.100/M

O3 Mini

winner

$4.40/M

Rank #119/184 · confidence 4

Reasoningverified

GPQA

SourceGPT-5.4 mini (medium)

GPT-5.4 Mini

winner

82.3%

Rank #85/216 · confidence 4

+7.5%

O3 Mini

74.8%

Rank #120/216 · confidence 4

Reasoningverified

HLE

SourceGPT-5.4 mini (medium)

GPT-5.4 Mini

winner

18.6%

Rank #88/213 · confidence 4

+10.7%

O3 Mini

7.9%

Rank #132/213 · confidence 4

Codingreported

AA-SciCode

SourceGPT-5.4 mini

GPT-5.4 Mini

winner

49.9

Rank #30/109 · confidence 3 · eval date 2026-03-17

+10.0

O3 Mini

39.9

Rank #71/109 · confidence 1 · eval date 2025-01-31

Codingreported

BenchLM Coding score

SourceGPT-5.4 mini

GPT-5.4 Mini

winner

55.5

Rank #40/82 · confidence 3 · eval date 2026-03-17

+34.2

O3 Mini

21.3

Rank #81/82 · confidence 1 · eval date 2025-01-31

Codingverified

SciCode

SourceGPT-5.4 mini (medium)

GPT-5.4 Mini

winner

44.2%

Rank #54/209 · confidence 4

+4.3%

O3 Mini

39.9%

Rank #89/209 · confidence 4

Knowledgereported

BenchLM Knowledge score

SourceGPT-5.4 mini

GPT-5.4 Mini

56.9

Rank #52/70 · confidence 3 · eval date 2026-03-17

+8.7

O3 Mini

winner

65.6

Rank #38/70 · confidence 1 · eval date 2025-01-31

Knowledgereported

Artificial Analysis Intelligence Index

SourceGPT-5.4 mini

GPT-5.4 Mini

winner

40.9

Rank #41/112 · confidence 3 · eval date 2026-03-17

+21.7

O3 Mini

19.2

Rank #88/112 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-GPQA Diamond

SourceGPT-5.4 mini

GPT-5.4 Mini

winner

87.5

Rank #43/109 · confidence 3 · eval date 2026-03-17

+12.7

O3 Mini

74.8

Rank #83/109 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-HLE

SourceGPT-5.4 mini

GPT-5.4 Mini

winner

28.1

Rank #51/109 · confidence 3 · eval date 2026-03-17

+20.2

O3 Mini

7.9

Rank #84/109 · confidence 1 · eval date 2025-01-31

Agentsreported

τ²-bench results

SourceGPT-5.4 mini

GPT-5.4 Mini

winner

93.4

Rank #29/82 · confidence 3 · eval date 2026-03-17

+64.7

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 Mini
O3 Mini
No completed audits are available from shared providers 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 Mini
O3 Mini
ZetaTechs API6 tests

GPT-5.4 Mini

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

44 tok/s / 17418ms

input / output

No data

MyWebUI API5 tests

GPT-5.4 Mini

speed / latency

98 tok/s / 4039ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

N1N5 tests

GPT-5.4 Mini

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

117 tok/s / 4809ms

input / output

No data

Vercel AI Gateway5 tests

GPT-5.4 Mini

speed / latency

195 tok/s / 1104ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

YUNWU API5 tests

GPT-5.4 Mini

gpt-5.4-mini

speed / latency

201 tok/s / 1441ms

input / output

$0.010/M/$0.062/M

O3 Mini

o3-mini-2025-01-31

speed / latency

N/A / N/A

input / output

$0.026/M/$0.105/M

兔子API

GPT-5.4 Mini

gpt-5.4-mini

speed / latency

No data

input / output

$0/request

O3 Mini

o3-mini

speed / latency

No data

input / output

$0/request

KKSJ-AI

GPT-5.4 Mini

gpt-5.4-mini

speed / latency

No data

input / output

$0.062/M/$0.370/M

O3 Mini

o3-mini-all

speed / latency

No data

input / output

$0.0062/request

KFCV50

GPT-5.4 Mini

gpt-5.4-mini

speed / latency

No data

input / output

$0.010/M/$0.062/M

O3 Mini

o3-mini-2025-01-31

speed / latency

No data

input / output

$0.075/M/$0.301/M

Zhongzhuan Chat

GPT-5.4 Mini

gpt-5.4-mini

speed / latency

No data

input / output

$0.010/M/$0.062/M

O3 Mini

o3-mini

speed / latency

No data

input / output

$0.026/M/$0.105/M

FAQ

Weighted outcome: GPT-5.4 Mini. 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.