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Google says all requests to gemini-3.7-flash are automatically routed to gemini-3.8-flash, and all requests to gemini-3.5-flash to gemini-3.6-flash, with no shutdown date announced

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Google's Gemini API changelog says gemini-3.7-flash and gemini-3.5-flash are deprecated and that all requests to them are automatically routed to gemini-3.8-flash and gemini-3.6-flash respectively; it tells developers to update the model string. The items sit under an entry dated October 8 but are missing from an Internet Archive capture of October 9. The deprecations page lists 'No shutdown date announced' for both, and the pricing page no longer has a 3.7 Flash or 3.5 Flash section.

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Google says all requests to gemini-3.7-flash in the Gemini API are automatically routed to gemini-3.8-flash, and all requests to gemini-3.5-flash to gemini-3.6-flash. The statements sit in the changelog under an entry dated October 8, which also announces that one Deep Research agent will be shut down on October 23.

The entry gives no time of day. Internet Archive captures of the changelog show the October 8 entry without the two Flash items at 17:32 UTC on October 9, and with them at 12:11 UTC on October 10.

What Google tells developers

The entry says gemini-3.7-flash "is deprecated and has been replaced by" gemini-3.8-flash, and says the same of gemini-3.5-flash and gemini-3.6-flash. It tells developers to update the model string to gemini-3.8-flash in the first case and to gemini-3.6-flash (or gemini-3.8-flash) in the second, and to review the Gemini 3.8 Flash or 3.6 Flash guide respectively. Both old models' pages carry the same routing sentence.

No shutdown date

Google's deprecations page lists gemini-3.7-flash (released August 13, 2026) and gemini-3.5-flash (released May 19, 2026), each with "No shutdown date announced". Its "Recommended replacement" column names gemini-3.8-flash and gemini-3.6-flash respectively, each with a note that requests to the old name "are automatically routed" to it.

A note on the page says: "The shutdown dates listed in the table indicate the earliest possible dates on which a model might be retired." It adds that Google "will communicate the exact shutdown date to users with advance notice".

What the pricing page now lists

Google's pricing page, footer dated October 9 UTC, has price sections for Gemini 3.8 Flash and Gemini 3.6 Flash. Its visible text has none for 3.7 Flash or 3.5 Flash. Internet Archive captures of the page taken October 5, October 7 and October 8, the last at 17:54 UTC, show both older sections; the capture of October 9 at 22:33 UTC shows neither. The captures date the change only to the time between those two.

The capture of October 7 at 23:31 UTC lists 3.7 Flash's paid-tier standard prices at $0.75 input and $3.75 output per million tokens through December 31, 2026, then $1.50 and $7.50 starting January 1, 2027. It lists 3.5 Flash at $1.50 and $9.00, with no end date. Today's page lists the same $0.75 and $3.75, then $1.50 and $7.50, for both 3.8 Flash and 3.6 Flash.

By this desk's comparison of those listed paid-tier rates, the 3.7 Flash and 3.8 Flash token prices match line for line. Against 3.5 Flash, 3.6 Flash is listed lower on standard input through December 31, equal on standard input from January 1, and lower on standard output in both periods. Its Batch, Flex and Priority input and output prices follow the same pattern.

What the pages do not say

No page read says how long the routing will last, whether a routed request is billed at the old name's listed rate or the replacement's, or whether its output differs from what the old model returned.

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