AI illustration: Grok 4.5 released to the public on July 9, 2026
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Delivered

Grok 4.5 released to the public on July 9, 2026

“@SpaceXAI will make Grok 4.5 available to the public tomorrow. It is an Opus-class model, but faster, more token-efficient and lower cost.”
— Elon Musk · Jul 8, 2026 · Elon Musk on X (Jul 8 2026) ↗
See his original post on XLoads Elon's actual tweet, right here.
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What actually happened

Musk announced on July 8, 2026 that xAI would make Grok 4.5 public the next day. It shipped on schedule: as of July 9, 2026 Grok 4.5 is live on the xAI API (priced $2/1M input, $6/1M output tokens), set as the default in Grok Build, available across all Cursor plan tiers, and on the SpaceXAI console (EU excluded at launch). Musk billed it as an 'Opus-class' model that is faster, more token-efficient and lower cost. xAI release notes ↗

The Progression

Jul 8, 2026
The promise: “@SpaceXAI will make Grok 4.5 available to the public tomorrow. It is an Opus-class model, but faster, more token-efficient and lower cost.” · Elon Musk on X (Jul 8 2026) ↗
Jul 9, 2026
Delivered — on time. Musk announced on July 8, 2026 that xAI would make Grok 4.5 public the next day. It shipped on schedule: as of July 9, 2026 Grok 4.5 is live on the xAI API (priced $2/1M input, $6/1M output tokens), set as the default in Grok Build, available across all Cursor plan tiers, and on the SpaceXAI console (EU excluded at launch). Musk billed it as an 'Opus-class' model that is faster, more token-efficient and lower cost. xAI release notes ↗
Today · Jul 16, 2026
Status: Delivered · on time. It happened.

On July 8, 2026 Musk said xAI (posting as @SpaceXAI) would make Grok 4.5 available to the public the next day, July 9, describing it as an 'Opus-class' model that is faster, more token-efficient and lower cost than the prior generation. The claim followed a customer beta-test program. It is a near-term, one-day release promise that resolves as soon as Grok 4.5 is publicly available.

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