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Head-to-head comparison

GPT-5.4 Mini vs GPT-5.4 Nano

GPT-5.4 Mini (OpenAI) and GPT-5.4 Nano (OpenAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 22 September 2026

As of 22 September 2026, GPT-5.4 Mini holds the stronger ModelCap Index position (#34 vs #81); and GPT-5.4 Nano is 3.6× cheaper per output token ($1.25/1M vs $4.50/1M).

Which should you choose?

Choose GPT-5.4 Mini if…

  • you want the stronger overall ModelCap Index position — #34 against #81 (71.9 vs 57.3 points).
  • Arena coding is your yardstick — 1496 against 1460.
  • ARC-AGI-2 is your yardstick — 18.9% against 5.7%.
  • AA Intelligence Index is your yardstick — 24.1 against 20.7.
  • AA τ²-Bench Telecom is your yardstick — 83.3% against 76.0%.

Choose GPT-5.4 Nano if…

  • API cost matters — $1.25/1M output tokens against $4.50/1M, about 3.6× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.20/1M against $0.75/1M.
  • AA Humanity's Last Exam is your yardstick — 28.3% against 28.1%.
  • you want the more recently listed model — GPT-5.4 Nano was listed 17 March 2026, GPT-5.4 Mini 17 March 2026.

GPT-5.4 Mini vs GPT-5.4 Nano: specs, pricing and context

Specification comparison of GPT-5.4 Mini and GPT-5.4 Nano
FieldGPT-5.4 MiniOpenAIGPT-5.4 NanoOpenAI
ModelCap Index position#34#81
Index score71.957.3
EvidenceMeasuredMeasured
Input price / 1M tokens$0.75$0.20
Output price / 1M tokens$4.50$1.25
Context window400K tokens400K tokens
Max output tokens128K128K
API providers listed22
Weight accessAPI onlyAPI only
Input modalitiesFile, Image, TextFile, Image, Text
First listed17 March 202617 March 2026
PublisherOpenAIOpenAI

Evidence: 4 public benchmark observations across 4 boards · 4 public benchmark observations across 4 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: GPT-5.4 Mini vs GPT-5.4 Nano

Public benchmark boards where GPT-5.4 Mini or GPT-5.4 Nano has a published result
BoardGPT-5.4 MiniGPT-5.4 NanoLeads
Arena codingArena (LMArena)14961490–1502High14601454–1466HighGPT-5.4 Mini
ARC-AGI-2ARC Prize Foundation18.9%X-High5.7%X-HighGPT-5.4 Mini
AA Intelligence IndexArtificial Analysis24.1intelligence-index:v4.3:xhigh20.7intelligence-index:v4.3:xhighGPT-5.4 Mini
AA τ²-Bench TelecomArtificial Analysis83.3%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5.4 mini (xhigh)":reasoning=true76.0%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5.4 nano (xhigh)":reasoning=trueGPT-5.4 Mini
AA Humanity's Last ExamArtificial Analysis28.1%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5.4 mini (xhigh)":reasoning=true28.3%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5.4 nano (xhigh)":reasoning=trueGPT-5.4 Nano

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

GPT-5.4 Mini vs GPT-5.4 Nano: common questions

Is GPT-5.4 Mini better than GPT-5.4 Nano?

GPT-5.4 Mini ranks higher on the ModelCap Index as of 22 September 2026: #34 against #81. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals do not overlap, but the aggregate Index does not predict performance on every task; compare the relevant benchmark configurations before choosing.

Is GPT-5.4 Mini cheaper than GPT-5.4 Nano?

GPT-5.4 Nano is cheaper on output tokens: $1.25/1M against $4.50/1M. Input tokens are $0.75/1M for GPT-5.4 Mini and $0.20/1M for GPT-5.4 Nano. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $3.75 for GPT-5.4 Mini versus $1.02 for GPT-5.4 Nano. GPT-5.4 Nano costs 72.7% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.

Which has the bigger context window, GPT-5.4 Mini or GPT-5.4 Nano?

Both publish a 400K-token context window.

Which is better for coding, GPT-5.4 Mini or GPT-5.4 Nano?

Arena coding: GPT-5.4 Mini 1496, GPT-5.4 Nano 1460 — GPT-5.4 Mini leads.

Are GPT-5.4 Mini and GPT-5.4 Nano open-weight models?

GPT-5.4 Mini: API only. GPT-5.4 Nano: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run GPT-5.4 Mini and GPT-5.4 Nano?

ModelCap currently lists 2 API providers for GPT-5.4 Mini and 2 for GPT-5.4 Nano, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this GPT-5.4 Mini vs GPT-5.4 Nano comparison?

Every figure comes from the sealed ModelCap dataset published 22 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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