Gemini 3.1 Flash-Lite

Claims and evidence

• Released 3 March 2026Released in preview as gemini-3.1-flash-lite-preview. ● Primary source[1] [2]March 3, 2026 [3]gemini-3.1-flash-lite-preview: release date
• Generally available as gemini-3.1-flash-lite 7 May 2026Other sources give: 8 May 2026 [4] Date of the Google Cloud blog post announcing general availability on Gemini Enterprise Agent Platform. ● Primary source[2]May 7, 2026 [3]gemini-3.1-flash-lite: release date [5]gemini-3.1-flash-lite: release date
• Preview endpoint gemini-3.1-flash-lite-preview shut down 25 May 2026Deprecation of the preview endpoint was announced on 2026-05-07, effective 2026-05-11. ● Primary source[2]May 25, 2026 [3]gemini-3.1-flash-lite-preview: shutdown date

• Status AvailableGenerally available since 2026-05-07. The deprecations page lists 2027-05-07 as the earliest possible shutdown date and Agent Platform gives May 7, 2027 or later; no deprecation had been announced on 2026-10-01. ● Primary source[6]Gemini 3, Stable [3]Gemini 3 models: gemini-3.1-flash-lite [5]Models available for at least 12 months after release
• Replaced by Gemini 3.5 Flash-LiteRecommended replacement as listed on the Gemini deprecations page when checked on 2026-10-01, next to an earliest shutdown date of May 7, 2027. ● Primary source[3]gemini-3.1-flash-lite: recommended replacement

• Successor of Gemini 2.5 Flash-Lite EditorialEditorial link along the Flash-Lite tier: the release notes call it the first Flash-Lite model in the Gemini 3 series and name it the replacement for gemini-2.5-flash-lite-preview-09-2025, but Google does not call it a successor of Gemini 2.5 Flash-Lite; the launch post compares it with Gemini 2.5 Flash. ● Primary source[2]March 3, 2026; March 31, 2026 [3]gemini-2.5-flash-lite-preview-09-2025: recommended replacement
• Derived from (other) Gemini 3 ProThe model card says Gemini 3.1 Flash-Lite is based on Gemini 3 Pro; it does not name the method. ● Primary source[7]Model Information: Model dependencies

• Change · Architecture Based on Gemini 3 Pro, according to Google's model card.Compared with Gemini 2.5 Flash-Lite ● Primary source[7]Model Information: Model dependencies

• Input text, image, audio, videoPDF input is also supported. ● Primary source[8]Supported data types: Inputs [7]Inputs
• Output text ● Primary source[8]Supported data types: Output
• Feature Reasoning modeThinking levels come standard in Google AI Studio and Vertex AI. ● Primary source[1]Adaptive intelligence at scale for developers [8]Capabilities: Thinking
• Feature Function calling ● Primary source[8]Capabilities: Function calling
• Context window 1,048,576 tokensInput token limit; the output limit is 65,536 tokens. The model card gives a context window of up to 1M. ● Primary source[8]Token limits: Input token limit
• Parameters Not disclosedNot disclosed by Google. No claim madeNo source
• Access API, consumer appAPI: the Gemini API (Google AI Studio) and Vertex AI. The launch post names only these; the model card also lists the Gemini app and AI Overviews in Search among its distribution channels. ● Primary source[1]second paragraph [7]Distribution

Lineage

Variants

No variants recorded in this record.

Related AI Radar coverage

AI Radar coverage starts in June 2026; no coverage linked yet.

All model releases from Google on AI Radar →