Google deprecated gemini-3.7-flash (replaced by gemini-3.8-flash) and gemini-3.5-flash (replaced by gemini-3.6-flash); requests to the old models are automatically routed to the replacements. The deep-research-pro-preview-12-2025 agent will be shut down on October 23, 2026, with newer versions deep-research-preview-04-2026 and deep-research-max-preview-04-2026 available.
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What to doUpdate your model strings to gemini-3.8-flash or gemini-3.6-flash, and migrate Deep Research requests to a newer agent version before October 23, 2026.
- Provider
- Source
- ai.google.dev
- Models
- Deep Research Max Preview (Apr-21-2026)deep-research-max-preview-04-2026Deep Research Preview (Apr-21-2026)deep-research-preview-04-2026Deep Research Pro Preview (12-2025)deep-research-pro-preview-12-2025Gemini 3.5 Flashgemini-3.5-flashGemini 3.6 Flashgemini-3.6-flashGemini 3.7 Flashgemini-3.7-flashGemini 3.8 Flashgemini-3.8-flash