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Google announces Gemini 1.5 Pro with a context window of up to 1 million tokens

See how this story connects

Source: Google blog

Google announced Gemini 1.5 on 15 February 2024, and its first version, Gemini 1.5 Pro, is a mid-size multimodal model built on a mixture-of-experts architecture. It came with a standard 128,000-token context window, and a limited group of developers and enterprise customers got a private preview of a 1 million-token window through AI Studio and Vertex AI. Google said its research had tested up to 10 million tokens.

Why it matters

Developers in the preview could put long documents, large codebases or video into a single prompt, with a window almost eight times the 128,000-token standard.

When
15 Feb 2024
ID
WTA-N-2024-0036
Who
Google, Google DeepMind

Summary by wheresthe.ai, from Google blog. Checked against the source on 9 Oct 2026.

Read the original at Google blog

Source copy: download the page as saved on 18 Oct 2026 (PDF). Also held by the Internet Archive.

Earlier in this Storyline: What led hereGoogle launches Gemini 1.0 in Ultra, Pro and Nano sizes

Cite this story

WTA-N-2024-0036: “Google announces Gemini 1.5 Pro with a context window of up to 1 million tokens.” wheresthe.ai, 15 Feb 2024. https://wheresthe.ai/d/google-gemini-1-5-pro-2024-02/ (source: Google blog).

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