What is the context window of Deep Research Preview?

Deep Research Preview has a context window of 1048576 tokens.

When was Deep Research Preview released?

Deep Research Preview was released on 2026-04-21.

Name: Deep Research Preview
Author: Google DeepMind

deep-research-preview

Deprecated

Proprietary

Deep Research Preview has a 1M-token context window.

VisionMultimodalReasoningFunction CallingTool UseStructured OutputsCode ExecutionPrompt CachingBatch APIAudioFine-tuning

Released2026-04-21

ParametersNot disclosed (built on Gemini 3.1 Pro)

Context1M

Pioneering artificial intelligence research.

London, United Kingdom

Founded 2014