Grok 4.3 is xAI's chat model behind an OpenAI-compatible call, taking text and image parts in one message array. It reads 1,000,000 tokens, replies up to 900,000, and offers five reasoning-effort levels including none.
Input $1.25Output $2.50per 1 million tokensCached input $0.20Prompts of 200K tokens or moreInput $2.50Output $5
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