Gemini 3.8 Flash

Gemini 3.8 Flash is our most intelligent workhorse model yet, delivering significant improvements from 3.7 Flash across software engineering, agentic tasks, and critical, multi-step reasoning in specialized domains. 3.8 Flash delivers substantial gains from 3.7 Flash, often approaching the performance of higher-cost frontier models.

At times, 3.8 Flash might use more tokens to maximize performance, especially at higher effort levels. For applications where compute efficiency is the primary constraint, you can use lower effort levels to minimize token overhead or use 3.7 Flash instead.

Note: thinking_level="MINIMAL" is not available for 3.8 Flash. Explicitly setting thinking_level to MINIMAL will return an API validation error. The supported values for 3.8 Flash are LOW, MEDIUM (default), and HIGH.

Try in Agent Studio Deploy example app Developer guide Pricing

Note: "Deploy example app" requires a Google Cloud project with billing and Agent Platform API enabled.

Model ID	gemini-3.8-flash
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 Gemini Live API Not supported Structured output Supported Context caching Implicit context caching, explicit context caching Supported Count Tokens Supported RAG Engine Supported Chat completions Supported Tuning Not supported URL context Supported Agentic video understanding Preview feature Supported
Tools	Grounding Google Search, Google Maps Supported Code execution Supported Function calling Supported Computer use Preview feature Supported
Consumption options	Provisioned Throughput Supported Batch inference Supported Pay-as-you-go Standard PayGo, Flex PayGo, Priority PayGo Supported Fixed quota Not supported
Technical specifications	Image	Maximum images per prompt: 3,000 Maximum file size per file for inline data or direct uploads through the console: 7 MB Maximum file size per file from Google Cloud Storage: 30 MB Supported MIME types: image/png, image/jpeg, image/webp, image/heic, image/heif
	Text	Maximum number of files per prompt: 3,000 Maximum number of pages per file: 3,000 Maximum file size per file for the API or Cloud Storage imports: 50 MB(application/pdf) or 7 MB(text/plain) Maximum file size per file for direct uploads through the console: 7 MB 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 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 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, eu
	ML processing	Multi-region: us, eu
	Provisioned Throughput	Global: global Multi-region: us, eu
	Standard PayGo	Global: global Multi-region: us, eu
Versions	gemini-3.8-flash Launch stage: GA Release date: September 2, 2026
Security controls	Online prediction	Data residency CMEK VPC-SC AXT
	Batch inference	Data residency CMEK VPC-SC AXT
	Context caching	Data residency CMEK VPC-SC AXT
	See Security controls for more information.