Is Grok 4.1 Fast (Reasoning) or GPT-5.2 Codex cheaper?

Grok 4.1 Fast (Reasoning) is cheaper on output tokens ($0.50 vs $14.00 per 1M).

Which has the larger context window, Grok 4.1 Fast (Reasoning) or GPT-5.2 Codex?

GPT-5.2 Codex has the larger context window (400K tokens).

Grok 4.1 Fast (Reasoning) vs GPT-5.2 Codex

Grok 4.1 Fast (Reasoning) is cheaper on output tokens, while GPT-5.2 Codex offers a larger context window. Choose Grok 4.1 Fast (Reasoning) or GPT-5.2 Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Grok 4.1 Fast (Reasoning)	GPT-5.2 Codex
Provider	Azure	Azure
Input / 1M tokens	$0.20	$1.75
Output / 1M tokens	$0.50	$14.00
Context window	128K	400K
Parameters	—	—
Open weights	No	No
Released	Jun 2025	Jan 2026

Grok 4.1 Fast (Reasoning) details →GPT-5.2 Codex details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.