Grok 4.5 rivals Anthropic's Opus-class models at $2/M input tokens—60% cheaper—while offering 2x token efficiency, positioning it as a strong budget alternative ahead of OpenAI's upcoming GPT 5.6 release.

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SpaceXAI launched Grok 4.5, claiming it rivals Anthropic's Opus-class models but at far lower cost — $2 per million input tokens versus Opus 4.7's $5. Elon Musk also highlighted twice the token efficiency of competing models, making it a strong budget-friendly option as OpenAI prepares to release GPT 5.6.

SpaceXAI releases Grok 4.5, which Elon describes as an ‘Opus-class model’

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