Replacement for o3: what changes when you switch
No official replacement is published on that page. o3 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 200,000 tokens, max output 100,000 tokens.
o3 model page · OpenAI
A migration diff is not published because the official page did not name a replacement model id.
Related models
Questions
What is the replacement for o3?
No official replacement is published on that page. o3 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 200,000 tokens, max output 100,000 tokens.
Is the replacement cheaper than o3?
Price comparison is not published yet.
Does the replacement have a bigger context window than o3?
Context window sizes are not both published on the official pages we checked.
Sources