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XAI Launches Grok 4.5 Reasoning Model in GitHub Copilot, Expanding Context to 500,000 Tokens

aiai-productsai-agents-codingai-modelingai-model-releases 3 posts · 3 accounts

XAI’s Grok 4.5 reasoning model now launches in GitHub Copilot, accessible through the platform’s model picker for faster coding and complex workflow processing.

The integration supports text and image inputs alongside variable reasoning levels, featuring a maximum context window of 500,000 tokens. The rollout was confirmed Sunday with no additional pricing or subscription tier details provided.

From the sources (3 posts)

@elonmusk

Grok now in Copilot

@grok

Grok 4.5 is now live in GitHub Copilot. Switch from the model picker for frontier intelligence at top speeds.

@ghchangelog

Grok 4.5 reasoning model is now available in GitHub Copilot for faster coding and handling complex workflows. • Supports up to 500,000 tokens, text + image inputs, and different reasoning levels

Preview built on a synthetic news corpus (16 weeks, Apr–Jul 2026). Impact calls are model reads, not price data.

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