SpaceXAI has released Grok 4.5, its first model since going public. Elon Musk describes it as an 'Opus-class model' — comparable to Anthropic's Claude Opus 4.7 — but faster and more cost-efficient. Grok 4.5 is priced at $2 per million input tokens and $6 per million output tokens, significantly undercutting Opus 4.7 ($5/$25) and OpenAI's Sol model ($5/$30). SpaceXAI also claims twice the token efficiency of competing models. The release comes amid a busy week for AI, with OpenAI set to release GPT 5.6 the following day.
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