Is GPT-5.6 Terra or Claude Opus 5.5 cheaper?

GPT-5.6 Terra is cheaper on output tokens ($12.00 vs $20.00 per 1M).

Which has the larger context window, GPT-5.6 Terra or Claude Opus 5.5?

GPT-5.6 Terra has the larger context window (1.1M tokens).

GPT-5.6 Terra vs Claude Opus 5.5

GPT-5.6 Terra is cheaper on output tokens, while GPT-5.6 Terra offers a larger context window. Choose GPT-5.6 Terra or Claude Opus 5.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.6 Terra	Claude Opus 5.5
Provider	CrossModel	CrossModel
Input / 1M tokens	$2.00	$4.00
Output / 1M tokens	$12.00	$20.00
Context window	1.1M	1M
Parameters	—	—
Open weights	No	No
Released	Jul 2026	Sep 2026

GPT-5.6 Terra details →Claude Opus 5.5 details →

FAQ

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