01 · Operational consequence
Lifecyclecompleted
Severitycritical
ConsequenceThe change applies to the listed Gemini API model endpoints; no regional exception is documented.
02 · Affected subjects
Componentsimagen-4.0-generate-001, imagen-4.0-ultra-generate-001, imagen-4.0-fast-generate-001
AudienceGemini API developers generating images with any of the three stable Imagen 4 model IDs.
RegionGemini API; no regional exception documented
03 · Detection
Stable event IDksr-google-imagen-4-2026-08-17
Change typeretirement
04 · Before → after
BeforeDeprecated before August 17, 2026
AfterOfficial shutdown date passed
05 · Required action
ActionRemove the three Imagen 4 model IDs from production and migrate to gemini-3.1-flash-image; re-test image quality, prompt adherence, safety, latency and cost.
Replacement or migration pathMove representative prompts to gemini-3.1-flash-image and test aspect ratios, safety, provenance, latency, quota and cost.
06 · Actionable date
Date roleMigration deadline
Date2026-08-17
Statuscompleted
07 · Kingy reproduction
StatusNot tested
LimitationsSource evidence reviewed; no paid vendor call or production reproduction was run.
08 · Sources and revision
Checked2026-09-04
Official sourceshttps://ai.google.dev/gemini-api/docs/deprecations · https://ai.google.dev/gemini-api/docs/changelog · https://ai.google.dev/gemini-api/docs/image-generation · https://ai.google.dev/gemini-api/docs/models/gemini-3.1-flash-image · https://ai.google.dev/gemini-api/docs/pricing
Correction history2026-08-23: Post-deadline verification changed the record from scheduled shutdown to shutdown date passed.