Google deprecated gemini-3.5-flash on 2026-10-08 in favour of gemini-3.6-flash: it is no longer available to select in Google AI Studio; at the 2026-10-23 catalogue recheck the id is absent from the free-tier endpoint table and from the pricing page, so the free tier is gone; second source is the 2026-10-08 entry in the AI Studio changelog; first seen in our records 2026-10-06, last listed the same day → end date Oct 8
$0 · accountGoogle account, a project with no billing account; limits per project, shown only inside AI Studio; not available in China, Hong Kong or Macau
Gemini API key from a project without billing; free-tier limits per project, reset at midnight Pacific; UK / EEA / Swiss users get the paid-tier data terms