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.

Back to models

Data points: 145

Model compare

GPT-5.4 vs GPT-5.4 Mini

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

Model A

GPT-5.4

OpenAI

Leading

Model B

GPT-5.4 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 88 to 12.

Evidence depth

145 data points

Includes 40 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with GPT-5.4

The charts below split 50 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.

Model AModel B

Comparison sheet

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

Model compare	GPT-5.4	GPT-5.4 Mini
Overall leader	Leading	Contender
Weighted overall score	88.0 pts	12.0 pts
Benchmark category leads	7 categories	0 categories
Operational advantages	Free providers, Provider coverage	Cheapest input price, Average speed, First-token latency
Context window	1.1M tokens	400K tokens
Max output	128K tokens	128K tokens
Modalities	Input TextImageFile Output Text	Input FileImageText Output Text
Features	Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning	Text inputImage 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	GPT-5.4 Mini
Developer	OpenAI	OpenAI
Released	Mar 2026	Mar 2026
Parameters	No data	No data
Tokenizer	GPT	GPT
Knowledge cutoff	No data	2025-08-31
OpenRouter ID	openai/gpt-5.4	openai/gpt-5.4-mini
References	No data	No data

When to choose each model

This report only uses LMSpeed data for GPT-5.4 and GPT-5.4 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, Math) and operational dimensions (Free providers, Provider coverage).

GPT-5.4 Mini

GPT-5.4 Mini has these operational advantages: Cheapest input price, Average speed, First-token latency.

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: 7 / 8
Shared: 7 shared categories

Avg. score

GPT-5.4

56.6

Avg. score

GPT-5.4 Mini

51.1

Agents

GPT-5.4 leads by 6.2

GPT-5.456.3

GPT-5.4 Mini50.1

Coding

GPT-5.4 leads by 5.4

GPT-5.462.2

GPT-5.4 Mini56.8

Reasoning

GPT-5.4 leads by 0.3

GPT-5.455.7

GPT-5.4 Mini55.4

Knowledge

GPT-5.4 leads by 13.1

GPT-5.458.5

GPT-5.4 Mini45.4

Math

GPT-5.4 leads by 7.5

GPT-5.456.8

GPT-5.4 Mini49.3

Multilingual

No data

GPT-5.4-

GPT-5.4 Mini-

Multimodal

GPT-5.4 leads by 5.4

GPT-5.452.5

GPT-5.4 Mini47.1

Instruction following

GPT-5.4 leads by 0.2

GPT-5.454

GPT-5.4 Mini53.8

Professional benchmark details

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

Group

Aggregatereported

Provider	GPT-5.4	GPT-5.4 Mini
Mars HK140 tests	GPT-5.4 speed / latency 49 tok/s / 6084ms input / output No data	GPT-5.4 Mini speed / latency 128 tok/s / 4452ms input / output No data
Mars HK105 tests	GPT-5.4 speed / latency 57 tok/s / 3556ms input / output No data	GPT-5.4 Mini speed / latency 145 tok/s / 5776ms input / output No data
天宫造物50 tests	GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data	GPT-5.4 Mini speed / latency N/A / N/A input / output No data
QuicklyAPI45 tests	GPT-5.4 speed / latency 50 tok/s / 2467ms input / output No data	GPT-5.4 Mini speed / latency 50 tok/s / 7767ms input / output No data
XShuLab Sub2API40 tests	GPT-5.4 speed / latency 24 tok/s / 2652ms input / output No data	GPT-5.4 Mini speed / latency 139 tok/s / 2844ms input / output No data
180txt API	GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0/M/$0/M	GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0.547/M/$3.29/M
APIMart	GPT-5.4 gpt-5.4 speed / latency No data input / output $0/M/$0/M	GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0.575/M/$3.45/M
Dext API	GPT-5.4 gpt-5-4 speed / latency No data input / output $0/M/$0/M	GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0.062/M/$0.370/M
Moyanjdc API	GPT-5.4 gpt-5.4 speed / latency No data input / output $0/M/$0/M	GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0/M/$0/M
兔子API	GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0/request	GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0/request

Comparison sheet

Model metadata

When to choose each model

Benchmark score comparison

Category performance

Agents

Coding

Reasoning

Knowledge

Math

Multilingual

Multimodal

Instruction following

Professional benchmark details

BenchLM overall score

Input price

Blended price

Output price

CritPt

AA-LCR

BenchLM Reasoning score

GPQA

HLE

Vibe Code Bench

EEBench

AA-SciCode

AA Coding Index

BenchLM Coding score

FrontierMath v2 (Tiers 1-3)

FrontierMath v2 (Tier 4)

BenchLM Math score

AA-Omniscience Hallucination Rate

AA-HLE

AA-Omniscience Accuracy

HLE w/o tools

AA-GPQA Diamond

Artificial Analysis Intelligence Index

BenchLM Knowledge score

MMMU-Pro w/ Python

MMMU-Pro

AA-MMMU-Pro

BenchLM Multimodal Grounded score

BenchLM Instruction Following score

AA-IFBench

τ²-bench results

Toolathlon

APEX-Agents-AA

OSWorld-Verified

Terminal-Bench 2.0

AA Agentic Index

MCP Atlas

GDPval-AA

GDPval-AA

BenchLM Agentic score

API audit comparison

Provider examples

FAQ

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