Is Claude Opus 4.1 or GPT-5.3 Codex cheaper?

GPT-5.3 Codex is cheaper on output tokens ($14.00 vs $75.00 per 1M).

Which has the larger context window, Claude Opus 4.1 or GPT-5.3 Codex?

GPT-5.3 Codex has the larger context window (400K tokens).

Claude Opus 4.1 vs GPT-5.3 Codex

GPT-5.3 Codex is cheaper on output tokens, while GPT-5.3 Codex offers a larger context window. Choose Claude Opus 4.1 or GPT-5.3 Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Claude Opus 4.1	GPT-5.3 Codex
Provider	Azure Cognitive Services	Azure Cognitive Services
Input / 1M tokens	$15.00	$1.75
Output / 1M tokens	$75.00	$14.00
Context window	200K	400K
Parameters	—	—
Open weights	No	No
Released	Nov 2025	Feb 2026

Claude Opus 4.1 details →GPT-5.3 Codex details →

FAQ

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