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: 81

Key Takeaways

The readout for GPT-4o Mini and GPT-5.4, before the detailed comparison sheet.

Decision read

Tie

Tie currently has the stronger profile, with verified wins split 3 to 3.

Evidence depth

81 data points

Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Tie

The charts below split 18 high-signal samples across speed, scores, and audit health.

Model compare GPT-4o Mini vs GPT-5.4 gpt-4o-mini-vs-gpt-5-4	Model A GPT-4o Mini	Model B GPT-5.4
Overall leader	Tie	Tie
Verified metric wins	3 wins	3 wins
Where it leads	Cheapest input price, Average speed, First-token latency	Free providers, Provider coverage, Recent tests

Model compare

GPT-4o Mini vs GPT-5.4

gpt-4o-mini-vs-gpt-5-4

Model A

GPT-4o Mini

Model B

GPT-5.4

Overall leader

Tie

Verified metric wins

3 wins

Where it leads

Cheapest input price, Average speed, First-token latency

Free providers, Provider coverage, Recent tests

Benchmark score comparison

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

Metric	GPT-4o Mini	GPT-5.4
GPQA	42.6%#128

API audit comparison

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

Provider	GPT-4o Mini	GPT-5.4
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-4o Mini	GPT-5.4
158 tests	GPT-4o Mini speed / latency 81 tok/s / 2589ms input / output No data

When to choose each model

This report only uses LMSpeed data for GPT-4o Mini and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Guidance	GPT-4o Mini	GPT-5.4
When to choose each model	GPT-4o Mini GPT-4o Mini is stronger when you prioritize Cheapest input price, Average speed, First-token latency.	GPT-5.4 GPT-5.4 is stronger when you prioritize Free providers, Provider coverage, Recent tests.

FAQ

TL;DR: Tie leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.

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.

Continue from GPT-4o Mini vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.

Model metadata	GPT-4o Mini exposes 128K tokens; notable signals: Text input, Image input, File input, Text output.	GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output.
Developer	OpenAI	OpenAI
Context window	128K tokens	1.1M tokens
Max output	16.4K tokens	128K tokens
Released	Jul 2024	Mar 2026
Modalities	Input TextImageFile Output Text	Input TextImageFile Output Text
Features	Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search	Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode
Parameters	No data	No data
Tokenizer	GPT	GPT
Knowledge cutoff	2023-10-31	No data
OpenRouter ID	openai/gpt-4o-mini-2024-07-18	openai/gpt-5.4
References	No data	No data