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ai morning #14 — grok 4.5 in private beta at spacex and tesla, claiming opus-class performance
xAI shipped Grok 4.5 into production before any public release. It was trained on real developer session data baked into supplemental training. Early evals show performance close to or exceeding Opus. It deployed inside real infrastructure before any external benchmark or public API.
Marcus walks through what the Cursor data angle actually means for capability, why the community is split on which Opus xAI is comparing to, and what it means for builders routing coding workloads today.
In this episode:
00:00 Intro
01:16 Grok 4.5: 1.5T params, Cursor data — xAI's Grok 4.5 is live at SpaceX and…
The skinny
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