The confusion comes from a mismatch between official xAI documentation and an unofficial social post: in the evidence you provided, xAI’s docs clearly document Grok 4 and Grok 4 Fast, while the only mention of “Grok 4.3 (beta)” is a single X post snippet that claims specific parameter and training details.^{[2][6][7][23]}

So, based on this record, I can verify that Grok 4-era products and features have shipped or at least been officially documented, but I cannot verify any official Grok 4.3 specs; for those, the evidence is insufficient.^{[2][6][7][23]}

Why there is confusion

• The official xAI docs in this evidence set have pages for Grok 4 and Grok 4 Fast, but not for a separate officially documented model page called Grok 4.3.^[2][6][7]
• The only evidence here that mentions “Grok 4.3 (beta)” is an X post snippet saying it is “officially live” and claiming “1T params,” that it is “twice as big as Grok 4.20,” and that it was trained longer.^[23]
• That creates an evidence gap: people may repeat the X post’s claims as if they were official specs, but the supplied official docs do not confirm those claims.^{[2][6][7][23]}
• If you weigh reliability, the official xAI docs are the stronger source for what is actually shipped and documented than a single social post snippet.^{[2][6][7][23]}

What has really shipped so far, based on the official docs here

• Grok 4 is officially documented by xAI as its flagship model, described as offering strong natural language, math, and reasoning performance.^[2][6]
• Grok 4 Fast is also officially documented by xAI as a separate model positioned as a cost-efficient reasoning model.^[7]
• xAI also documents Grok Business / Enterprise, including dedicated personal and team workspaces plus enhanced privacy and sharing controls.^[3][4]
• xAI documents a Google Drive integration for Grok that lets users search and reference personal and team shared Drive files inside Grok chats.^[1]
• xAI’s FAQ also documents account features such as linking an X account sign-in/subscription to an xAI account from Grok Website settings.^[5]

What I cannot verify from this evidence

• I cannot verify an official Grok 4.3 spec sheet from the supplied record.^{[2][6][7][23]}
• I cannot verify the claimed 1T parameter count, the claim that it is “twice as big as Grok 4.20,” or the claim that it was trained much longer from an official xAI source in this evidence set.^[23]
• I also cannot confirm from this record whether “Grok 4.3” is a real public model name, an internal/beta label, a rollout alias, or just a claim being circulated socially.^[23]

Fact-check conclusion

• Verified: Grok 4, Grok 4 Fast, Grok Business/Enterprise features, Google Drive integration, and account-linking features are all officially documented in the provided xAI materials.^{[1][2][3][4][5][6][7]}
• Not verified: any official Grok 4.3 specs in the provided evidence.^{[2][6][7][23]}
• Best reading of the confusion: people are mixing official Grok 4 documentation with an unofficial “Grok 4.3 beta” social claim that is not corroborated by the official docs you supplied.^{[2][6][7][23]}

If you want, I can next turn this into a short “claim vs. evidence” table using only these same sources.