Post-Cutoff

Mustafa Suleyman: MAI now has state-of-the-art pre-trained base models ‘in the 3T-parameter weight class’

Mustafa Suleyman @mustafasuleymanX

Why it matters

Microsoft AI CEO’s announcement of MAI-Base-2; ~1.2M views, the highest-reach post in the Oct 16 sweep’s X list.

Summary

Announcement post (~1.2M views, ~3.1k likes by Oct 16 per fxtwitter): ‘We now have state-of-the-art pre-trained base models in the 3T-parameter weight class, built entirely in-house at MAI. Post-training results coming soon -- stay tuned!’ Links the technical post microsoft.ai/news/frontier-pre-training-at-microsoft-ai/. A follow-up (https://x.com/mustafasuleyman/status/2110766654863167694, ~16k views) says: ‘On held-out code, we matched DeepSeek-V4-Pro-Base’s pre-trained score using 12x less training compute.’

Archived text

We now have state-of-the-art pre-trained base models in the 3T-parameter weight class, built entirely in-house at MAI.

Post-training results coming soon -- stay tuned!

Lots of details in our technical blog post.

https://microsoft.ai/news/frontier-pre-training-at-microsoft-ai/

Source: x.com/mustafasuleyman/status/2110766651344146564Archived 2026-10-16 via fxtwitter (unofficial).Counts: 1,206,151 views, 3,100 likes, 308 reposts, 137 replies (at fetch time)

Cited in

  1. Model releases 107 days after the cutoff

    Microsoft AI’s MAI-Base-2 base model