Is GPT Realtime 1.5 or Claude Opus 4.1 cheaper?

GPT Realtime 1.5 is cheaper on output tokens ($16.00 vs $75.00 per 1M).

Which has the larger context window, GPT Realtime 1.5 or Claude Opus 4.1?

Claude Opus 4.1 has the larger context window (200K tokens).

GPT Realtime 1.5 vs Claude Opus 4.1

GPT Realtime 1.5 is cheaper on output tokens, while Claude Opus 4.1 offers a larger context window. Choose GPT Realtime 1.5 or Claude Opus 4.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT Realtime 1.5	Claude Opus 4.1
Provider	FastRouter	FastRouter
Input / 1M tokens	$4.00	$15.00
Output / 1M tokens	$16.00	$75.00
Context window	32K	200K
Parameters	—	—
Open weights	No	No
Released	Jun 2025	Aug 2025

GPT Realtime 1.5 details →Claude Opus 4.1 details →

FAQ

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