GPT-5.4 mini vs o3

Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.

Benchmark data for one or both models is coming soon. This page currently shows metadata and pricing where BenchLM has it, and score-level comparisons will populate as public benchmark results land.

BenchLM does not have sourced benchmark coverage for GPT-5.4 mini yet. This comparison is currently limited to metadata such as context window, reasoning mode, and pricing where available.

o3 is priced at $10.00 input / $40.00 output per 1M tokens, versus $0.75 input / $4.50 output per 1M tokens for GPT-5.4 mini. GPT-5.4 mini has the larger context window at 400K, compared with 200K for o3.

Quick Verdict

Benchmark data for GPT-5.4 mini and o3 is coming soon on BenchLM.

Agentic

Coming soon

Benchmark data for this category is coming soon.

Coding

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
HumanEval
78%

Multimodal & Grounded

Coming soon

Benchmark data for this category is coming soon.

Reasoning

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
SimpleQA
84%
Coming soon
MuSR
82%

Knowledge

GPT-5.4 mini

GPT-5.4 mini

88

o3

57.2

88%
GPQA
83.3%
Coming soon
MMLU
93.4%
Coming soon
SuperGPQA
85%
Coming soon
OpenBookQA
83%
Coming soon
HLE
24.9%

Instruction Following

Coming soon

Benchmark data for this category is coming soon.

Multilingual

Coming soon

Benchmark data for this category is coming soon.

Mathematics

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
AIME 2023
88%
Coming soon
AIME 2024
95.2%
Coming soon
AIME 2025
98.4%
Coming soon
HMMT Feb 2023
84%
Coming soon
HMMT Feb 2024
86%
Coming soon
HMMT Feb 2025
85%
Coming soon
BRUMO 2025
87%

Frequently Asked Questions

Can I compare GPT-5.4 mini and o3 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for GPT-5.4 mini and o3 today?

GPT-5.4 mini: $0.75 input / $4.50 output per 1M tokens o3: $10.00 input / $40.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

Last updated: March 17, 2026

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