证据：Gemini API deprecations page (checked 2026-10-22): veo-3.1-generate-preview, veo-3.1-fast-generate-preview and veo-3.1-lite-generate-preview have release date October 15, 2025 (lite March 31, 2026) and shutdown date October 22, 2026; the recommended replacement is gemini-omni-1.1-flash.
证据：Gemini API deprecations page (checked 2026-10-22): veo-3.1-generate-preview, veo-3.1-fast-generate-preview and veo-3.1-lite-generate-preview have release date October 15, 2025 (lite March 31, 2026) and shutdown date October 22, 2026; the recommended replacement is gemini-omni-1.1-flash.
证据：Gemini API pricing page (checked 2026-10-22): the Veo 3.1 Preview section carries a deprecation warning stating that veo-3.1-generate-preview, veo-3.1-fast-generate-preview and veo-3.1-lite-generate-preview will be shut down on October 22, 2026 and that users should migrate to gemini-omni-1.1-flash or the GA models on the Gemini Enterprise Agent Platform.
证据：Gemini API pricing page (checked 2026-10-22): the Veo 3.1 Preview section carries a deprecation warning stating that veo-3.1-generate-preview, veo-3.1-fast-generate-preview and veo-3.1-lite-generate-preview will be shut down on October 22, 2026 and that users should migrate to gemini-omni-1.1-flash or the GA models on the Gemini Enterprise Agent Platform.
证据：Gemini API deprecations page (checked 2026-10-22): veo-3.1-generate-preview, veo-3.1-fast-generate-preview and veo-3.1-lite-generate-preview have release date October 15, 2025 (lite March 31, 2026) and shutdown date October 22, 2026; the recommended replacement is gemini-omni-1.1-flash.