SunsetDiff

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

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