The official replacement is gemini-3.6-flash. gemini-3-flash-preview does not have a published shutdown date per Google Gemini API's deprecation page (checked 2026-10-17). Published on the official docs: input price $0.5 per million tokens, context window 1,048,576 tokens, max output 65,536 tokens.
gemini-3-flash-preview model page · Google Gemini API
A migration diff is not published because the official page did not name a replacement model id.
The official replacement is gemini-3.6-flash. gemini-3-flash-preview does not have a published shutdown date per Google Gemini API's deprecation page (checked 2026-10-17). Published on the official docs: input price $0.5 per million tokens, context window 1,048,576 tokens, max output 65,536 tokens.
Price comparison is not published yet.
Context window sizes are not both published on the official pages we checked.