Gemini 3.8 Flash is Google's multimodal reasoning model for coding, tool-driven applications and document work. It accepts text, images, audio, video and PDFs, and produces text.
What the interface supports
The documented input limit is 1,048,576 tokens and the output limit is 65,536 tokens. Function calling and structured responses support application workflows; audio input does not make this a speech-output or Live API model. Choose a separate voice model when the response must be spoken.
Migration and evaluation
When upgrading from Gemini 3.7 Flash, rerun the tasks that depend on tool arguments, document interpretation and long sequences of actions. Supported thinking levels are low, medium and high; minimal is unsupported. Test scanned pages, tables and conflicting passages using the same preprocessing your application uses. For an agent, log the actual arguments and results of each tool call.
Pricing has a scheduled change
The standard paid Gemini API rates through the publisher’s announced release are $0.75 input and $3.75 output per million tokens. The published rates from the publisher’s announced release are $1.50 and $7.50. Thinking output, caching, storage and grounding charges need to be included in a real budget.
Browse Google models or compare two models.