Is Claude Opus 4.8 or GPT-5 cheaper?

GPT-5 is cheaper on output tokens ($8.50 vs $25.00 per 1M).

Which has the larger context window, Claude Opus 4.8 or GPT-5?

Claude Opus 4.8 has the larger context window (1M tokens).

Claude Opus 4.8 vs GPT-5

GPT-5 is cheaper on output tokens, while Claude Opus 4.8 offers a larger context window. Choose Claude Opus 4.8 or GPT-5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Claude Opus 4.8	GPT-5
Provider	OpenCode Zen	OpenCode Zen
Input / 1M tokens	$5.00	$1.07
Output / 1M tokens	$25.00	$8.50
Context window	1M	400K
Parameters	—	—
Open weights	No	No
Released	May 2026	Aug 2025

Claude Opus 4.8 details →GPT-5 details →

FAQ

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