No official replacement is published on that page. gpt-5.6-terra does not have a published shutdown date per OpenAI's deprecation page (checked 2026-10-17). Published on the official docs: input price $2 per million tokens, context window 1,050,000 tokens, max output 128,000 tokens.
gpt-5.6-terra model page · OpenAI
A migration diff is not published because the official page did not name a replacement model id.
No official replacement is published on that page. gpt-5.6-terra does not have a published shutdown date per OpenAI's deprecation page (checked 2026-10-17). Published on the official docs: input price $2 per million tokens, context window 1,050,000 tokens, max output 128,000 tokens.
Price comparison is not published yet.
Context window sizes are not both published on the official pages we checked.