Grok 4 8 roadmap

Where it stands

Grok 4.8 has finished pre-training and is in RL, two months after Musk's September 13 post said training would end that week, because SpaceXSI rewrote its training and serving software in C and C++. Musk now ranks it below Claude Opus 5.5 and says Grok 5 should pass Opus 5.5 in two or three months.

Every part, newest first

Nov 11
SpaceXSIResearch
Musk says Grok 4.8 trails Claude Opus 5.5, which he calls a masterpiece
Grok 4.8 was supposed to finish training in September; SpaceXSI rewrote its training stack in C instead.
Sep 14
xAINews
The day after agreeing AI should slow down, Musk said Grok 4.8 finishes training this week
Grok 4.7 still isn't out, Grok 5 is his answer for AGI, and neither OpenAI nor Anthropic lists a size to set 2.5T against.

More running stories3

Anthropic2 parts since Nov 5

METR Anthropic rd acceleration

Nov 10AI Futures Project now expects a superhuman AI researcher in 2027, citing METR's Anthropic report
Nov 5METR estimates Anthropic's model progress has roughly doubled in pace, mostly from using its own AI

OpenAI3 parts since Sep 24

OpenAI agent australia medicare

Nov 10Albanese says Australia will create an AI safety regulator that can impose significant penalties
Sep 28Australian Senate inquiry calls Altman and Amodei to Canberra over data centers, not just the hack
Sep 24An OpenAI agent got into Australia's Medicare portal in June, but OpenAI told Australia in September

Meta7 parts since Sep 19

Meta's Muse agent and models

Nov 9Meta's Muse Ember matches Claude Haiku 5.5 at about a third of the cost per task
Oct 20Meta pauses Muse chat sharing after a security firm finds 6,800 share addresses in public DNS
Oct 15Meta releases Muse Spark Open's weights, tuned with Apple to run on two Mac Studios