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Head-to-head comparison

GPT-5.4 Mini vs Grok 4.6

GPT-5.4 Mini (OpenAI) and Grok 4.6 (xAI) 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 17 August 2026

As of 17 August 2026, Grok 4.6 holds the stronger ModelCap Index position (#10 vs #23); GPT-5.4 Mini is 1.3× cheaper per output token ($4.50/1M vs $6.00/1M); and Grok 4.6 offers the longer context window (500K vs 400K tokens).

Which should you choose?

Choose GPT-5.4 Mini if…

  • API cost matters — $4.50/1M output tokens against $6.00/1M, about 1.3× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.75/1M against $2.00/1M.
  • you want provider choice — 2 listed API providers against 1.

Choose Grok 4.6 if…

  • you want the stronger overall ModelCap Index position — #10 against #23 (74.4 vs 64.8 points).
  • you need the longer context window — 500K tokens against 400K.
  • Arena coding is your yardstick — 1512 against 1497.
  • ARC-AGI-2 is your yardstick — 67.1% against 18.9%.
  • Artificial Analysis Intelligence Index is your yardstick — 60.9 against 40.9.
  • you want the more recently listed model — Grok 4.6 was listed 12 August 2026, GPT-5.4 Mini 17 March 2026.

GPT-5.4 Mini vs Grok 4.6: specs, pricing and context

Specification comparison of GPT-5.4 Mini and Grok 4.6
FieldGPT-5.4 MiniOpenAIGrok 4.6xAI
ModelCap Index position#23#10
Index score64.874.4
EvidenceMeasuredMeasured
Input price / 1M tokens$0.75$2.00
Output price / 1M tokens$4.50$6.00
Context window400K tokens500K tokens
Max output tokens128K—
API providers listed21
Weight accessAPI onlyAPI only
Input modalitiesFile, Image, TextText, Image, File
First listed17 March 202612 August 2026
PublisherOpenAIxAI

Evidence: 4 public benchmark observations across 4 boards · 5 public benchmark observations across 5 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: GPT-5.4 Mini vs Grok 4.6

Public benchmark boards where GPT-5.4 Mini or Grok 4.6 has a published result
BoardGPT-5.4 MiniGrok 4.6Leads
Arena codingArena (LMArena)14971491–1503High15121485–1538HighGrok 4.6
ARC-AGI-2ARC Prize Foundation18.9%X-High67.1%X-HighGrok 4.6
ARC-AGI-3ARC Prize Foundation—2.1%X-HighOnly one result
Artificial Analysis Intelligence IndexArtificial Analysis40.9intelligence-index60.9intelligence-indexGrok 4.6

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 Grok 4.6: common questions

Is GPT-5.4 Mini better than Grok 4.6?

Grok 4.6 ranks higher on the ModelCap Index as of 17 August 2026: #10 against #23. 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.

Is GPT-5.4 Mini cheaper than Grok 4.6?

GPT-5.4 Mini is cheaper on output tokens: $4.50/1M against $6.00/1M. Input tokens are $0.75/1M for GPT-5.4 Mini and $2.00/1M for Grok 4.6. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, GPT-5.4 Mini or Grok 4.6?

Grok 4.6 has the larger context window: 500K tokens against 400K.

Which is better for coding, GPT-5.4 Mini or Grok 4.6?

Arena coding: GPT-5.4 Mini 1497, Grok 4.6 1512 — Grok 4.6 leads.

Are GPT-5.4 Mini and Grok 4.6 open-weight models?

GPT-5.4 Mini: API only. Grok 4.6: 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 Grok 4.6?

ModelCap currently lists 2 API providers for GPT-5.4 Mini and 1 for Grok 4.6, 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 Grok 4.6 comparison?

Every figure comes from the sealed ModelCap dataset published 17 August 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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