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Model comparison

GPT-5.4 mini vs o4-mini (high)

Updated July 30, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.

GPT-5.4 mini

OpenAI

55.8/100

Estimated · Public rank #81

90% interval 44.3–67.3

o4-mini (high)

OpenAI

49.1/100

Estimated · Public rank #123

90% interval 37.6–60.6

GPT-5.4 mini has the higher public score estimate, 55.79 versus 49.14, but the 90% score intervals overlap. Treat that as a lead, not a settled winner.

2 results are shared. Category rows based on different benchmark sets are marked directional and do not name a winner.

Which one for your work

Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.

  • Long documents

    Prompts that approach the documented context limit

    GPT-5.4 mini

    GPT-5.4 mini has the larger documented context window.

    Confidence: documented

Show secondary and unsupported calls

  • Coding work

    Code generation, repair, and software-engineering tasks

    Not enough matched evidence

    No shared weighted benchmark basis supports a winner.

    Confidence: limited

  • Agentic work

    Tool use, computer use, and multi-step task completion

    Not enough matched evidence

    No shared weighted benchmark basis supports a winner.

    Confidence: limited

  • Chat turn cost

    1K fresh input + 500 output tokens

    Not enough matched evidence

    A complete comparable API-rate estimate is not available for both models.

    Confidence: listed-rates

  • Cache-heavy agent loop cost

    200K cached + 20K fresh input + 10K output tokens

    Not enough matched evidence

    The page does not recommend a cost winner because at least one model cannot fit the stated workload in one request. o4-mini (high) does not fit this workload in one request. o4-mini (high) has no comparable published API token rate.

    Confidence: listed-rates

  • Repository review cost

    50K fresh input + 3K output tokens

    Not enough matched evidence

    A complete comparable API-rate estimate is not available for both models.

    Confidence: listed-rates

What is actually comparable

Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.

Shared results
2
GPT-5.4 mini only
12
o4-mini (high) only
0
Like-for-like categories
1 / 8

Category results, on a stated basis

Each row states whether both averages use the same weighted benchmark set. Directional and not-comparable rows remain visible, but they never receive a winner in this template.

Math

Like-for-like
GPT-5.4 mini
21.7
o4-mini (high)
20.2
Weighted basis
2 vs 2 rows
Reading
GPT-5.4 mini leads

Agentic

Not comparable
GPT-5.4 mini
65.7
o4-mini (high)
Not measured
Weighted basis
2 vs 0 rows
Reading
Not comparable

Coding

Not comparable
GPT-5.4 mini
Not measured
o4-mini (high)
Not measured
Weighted basis
0 vs 0 rows
Reading
Not comparable

Reasoning

Not comparable
GPT-5.4 mini
Not measured
o4-mini (high)
Not measured
Weighted basis
0 vs 0 rows
Reading
Not comparable

Knowledge

Not comparable
GPT-5.4 mini
47.8
o4-mini (high)
Not measured
Weighted basis
2 vs 0 rows
Reading
Not comparable

Multilingual

Not comparable
GPT-5.4 mini
Not measured
o4-mini (high)
Not measured
Weighted basis
0 vs 0 rows
Reading
Not comparable

Multimodal

Not comparable
GPT-5.4 mini
76.6
o4-mini (high)
Not measured
Weighted basis
1 vs 0 rows
Reading
Not comparable

Instruction following

Not comparable
GPT-5.4 mini
Not measured
o4-mini (high)
Not measured
Weighted basis
0 vs 0 rows
Reading
Not comparable

Shape of the matched evidence

Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.

Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.

  • FrontierMath v2 (Tier 4)

    Math

    GPT-5.4 mini: 2.080%o4-mini (high): 6.250%Normalized gap 4.2Shared source

  • FrontierMath v2 (Tiers 1-3)

    Math

    GPT-5.4 mini: 28.280%o4-mini (high): 24.828%Normalized gap 3.5Shared source

What each workload costs

Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.

Chat turn

1K fresh input + 500 output tokens

GPT-5.4 mini
$0.003
Fits in one request
o4-mini (high)
API rate not published
Fits in one request

o4-mini (high) has no comparable published API token rate.

Repository review

50K fresh input + 3K output tokens

GPT-5.4 mini
$0.051
Fits in one request
o4-mini (high)
API rate not published
Fits in one request

o4-mini (high) has no comparable published API token rate.

Cache-heavy agent loop

200K cached + 20K fresh input + 10K output tokens

GPT-5.4 mini
$0.075
Fits in one request
o4-mini (high)
API rate not published
Does not fit in one request
Cached-input rate unavailable

o4-mini (high) does not fit this workload in one request. o4-mini (high) has no comparable published API token rate.

Specification differences

Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.

Cached-input rate

A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.

GPT-5.4 mini

$0.075 per 1M cached input tokens

OpenAI pricing

o4-mini (high)

No comparable hosted API rate

Provider availability

GPT-5.4 mini

Generally Available · OpenAI Responses API

OpenAI model catalog

o4-mini (high)

Not sourced

Reasoning profile

GPT-5.4 mini

Reasoning

o4-mini (high)

Reasoning

Weight access

GPT-5.4 mini

Proprietary

o4-mini (high)

Proprietary

License

GPT-5.4 mini

Proprietary

o4-mini (high)

Proprietary

Release date

GPT-5.4 mini

2026-03-17

o4-mini (high)

2025-04-16

If you already use one of these models
Deployment change
Both entries list OpenAI as the provider. Confirm endpoint, model ID, limits, and feature support before switching.
Quality signal
GPT-5.4 mini has the higher public score estimate, 55.79 versus 49.14, but the 90% score intervals overlap.
Workload cost
A complete comparable API-rate estimate is not available for both models.
Context tradeoff
GPT-5.4 mini has the larger documented window (400K).

Run the same representative tasks against both endpoints before changing production traffic.

Benchmark evidence

The full public result ledger is available for audit without forcing a wide desktop table onto a phone.

Browse raw public benchmark evidence14 rows

Agentic

  • Terminal-Bench 2.0

    GPT-5.4 mini60%
    Source
    o4-mini (high)—

    Not directly comparable

  • OSWorld-Verified

    GPT-5.4 mini72.1%
    Source
    o4-mini (high)—

    Not directly comparable

  • MCP Atlas

    GPT-5.4 mini57.7%
    Source
    o4-mini (high)—

    Not directly comparable

  • Toolathlon

    GPT-5.4 mini42.9%
    Source
    o4-mini (high)—

    Not directly comparable

  • τ²-bench results

    GPT-5.4 mini93.4%
    Source
    o4-mini (high)—

    Not directly comparable

Coding

  • Vibe Code Bench

    GPT-5.4 mini47.97%
    Source
    o4-mini (high)—

    Not directly comparable

  • FrontierCode 1.1 Main

    GPT-5.4 mini27.0%
    Source
    o4-mini (high)—

    Not directly comparable

Knowledge

  • GPQA

    GPT-5.4 mini88%
    Source
    o4-mini (high)—

    Not directly comparable

  • HLE

    GPT-5.4 mini41.5%
    Source
    o4-mini (high)—

    Not directly comparable

  • HLE w/o tools

    GPT-5.4 mini28.2%
    Source
    o4-mini (high)—

    Not directly comparable

Math

  • FrontierMath v2 (Tiers 1-3)

    Shared source
    GPT-5.4 mini28.280%
    o4-mini (high)24.828%

    GPT-5.4 mini leads this result

  • FrontierMath v2 (Tier 4)

    Shared source
    GPT-5.4 mini2.080%
    o4-mini (high)6.250%

    o4-mini (high) leads this result

Multimodal

  • MMMU-Pro

    GPT-5.4 mini76.6%
    Source
    o4-mini (high)—

    Not directly comparable

  • MMMU-Pro w/ Python

    GPT-5.4 mini78%
    Source
    o4-mini (high)—

    Not directly comparable

Frequently asked questions

Which is better, GPT-5.4 mini or o4-mini (high)?

GPT-5.4 mini has the higher public score estimate, 55.79 versus 49.14, but the 90% score intervals overlap. The higher estimate is not a decisive winner because the uncertainty ranges overlap.

Which is better for coding, GPT-5.4 mini or o4-mini (high)?

The published evidence does not provide a shared weighted coding basis for both models, so BenchLM does not name a coding winner.

Which is better for agentic tasks, GPT-5.4 mini or o4-mini (high)?

The published evidence does not provide a shared weighted agentic tasks basis for both models, so BenchLM does not name a agentic tasks winner.

Which costs less, GPT-5.4 mini or o4-mini (high)?

Both models do not have comparable published API token rates, so this page does not name a universal price winner.

Which has the larger context window, GPT-5.4 mini or o4-mini (high)?

GPT-5.4 mini has the larger documented context window: 400K, compared with 200K.

Related comparisons

Compare API pricing Read the methodology Open the model selector

Last updated July 30, 2026

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