Gemini 3.8 Flash Cyber

Gemini 3.8 Flash Cyber is a post-training version of the Gemini 3.8 Flash model tailored specifically for cybersecurity use cases. Gemini 3.8 Flash is a Gemini Cyber model subject to Section 31(a) of the Service Specific Terms.

Gemini 3.8 Flash Cyber is available in GA behind an allowlist. To request access, contact your Google team or apply for access at Fairwind Program.

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Model ID	gemini-3.8-flash-cyber
Modalities	description Text Input and output photo Image Input only mic Audio Input only videocam Video Input only
Token limits	Context window	1,048,576
	Maximum output tokens	65,536
Capabilities	Thinking Supported System instructions Supported Structured output Supported Context caching Implicit context caching, explicit context caching Supported RAG Engine Not supported Tuning Not supported Agentic video understanding Supported
Tools	Grounding Google Search Supported Code execution Supported Function calling Supported URL context Not supported Computer use Not supported
APIs	GenerateContent API Supported Interactions API Supported Gemini Live API Not supported Count Tokens API Supported Chat Completions API Supported
Consumption options	Provisioned Throughput Supported Batch inference Not supported Pay-as-you-go Standard PayGo with Usage Tiers, Flex PayGo, Priority PayGo Supported Fixed quota Not supported
Input size limit	GenerateContent API: 500 MiB compressed Interactions API: 256 MiB compressed (synchronous or streaming)
Interactions API URI limit	Up to 100 distinct Cloud Storage (gs://) URIs per request across all modalities on the Interactions API, including URIs carried forward from earlier turns using previous_interaction_id. generateContent supports gs:// URIs up to the per-modality model item limits (up to 6,500 combined multimodal files when including plain-text files).
Technical specifications	Image	Maximum images per prompt: 3,000 (images and PDFs combined) Maximum inline part size (GenerateContent API): 256 MB Maximum file size per file from Cloud Storage: 2 GiB minus 500 KiB Maximum file size per file from public HTTP or HTTPS URLs: 15 MiB Maximum file size per file for direct local uploads in the console: 7 MiB inline (up to 50 MiB staged to Cloud Storage) Maximum file size per file for Google Drive imports in the console: 7 MB (10 MB total) Default resolution tokens: 1,120 Supported MIME types: image/png, image/jpeg, image/webp, image/heic, image/heif
	Text	Maximum number of files per prompt: 3,000 PDFs (shared with images; up to 6,500 total files when including plain text) Maximum number of pages per file: 3,000 Maximum inline part size (GenerateContent API): 256 MB Maximum file size per file from Cloud Storage: 2 GiB minus 500 KiB Maximum file size per file from public HTTP or HTTPS URLs: 15 MiB Maximum file size per file for direct local uploads in the console: 7 MiB inline (up to 50 MiB staged to Cloud Storage) Maximum file size per file for Google Drive imports in the console: 7 MB (10 MB total) Default resolution tokens: 560 OCR for scanned PDFs: Not used by default Supported MIME types: application/pdf, text/plain
	Video	Maximum video length (with audio): Approximately 45 minutes Maximum video length (without audio): Approximately 1 hour Maximum number of videos per prompt: 10 Maximum inline part size (GenerateContent API): 256 MB Maximum file size per file from Cloud Storage: 2 GiB minus 500 KiB Maximum file size per file from public HTTP or HTTPS URLs: 15 MiB Default resolution tokens per frame: 70 Supported MIME types: video/x-flv, video/quicktime, video/mpeg, video/mpegs, video/mpg, video/mp4, video/webm, video/wmv, video/3gpp
	Audio	Maximum audio length per prompt: Approximately 8.4 hours, or up to 1 million tokens Maximum number of audio files per prompt: 1,000 Maximum inline part size (GenerateContent API): 256 MB Maximum file size per file from Cloud Storage: 2 GiB minus 500 KiB Maximum file size per file from public HTTP or HTTPS URLs: 15 MiB Speech understanding for: Audio summarization, transcription, and translation Supported MIME types: audio/x-aac, audio/flac, audio/mp3, audio/m4a, audio/mpeg, audio/mpga, audio/mp4, audio/ogg, audio/pcm, audio/wav, audio/webm
	Parameter defaults	Temperature: 1.0 topP: 0.95 topK: 64 Frequency penalty: 0 Presence penalty: 0
Supported regions	Model availability	Global: global Multi-region: us
	ML processing	Multi-region: us
	Provisioned Throughput	Global: global Multi-region: us
	Standard PayGo	Global: global Multi-region: us
Versions	gemini-3.8-flash-cyber Launch stage: GA Release date: September 16, 2026
Security controls	Online prediction	Data residency CMEK VPC-SC AXT
	Context caching	Data residency CMEK VPC-SC AXT
	See Security controls for more information.