When will Grok 4.8 finish training?

Musk said Grok 4.8 finishes model training this week.

Which version is expected to reach AGI?

Musk said AGI's achievement will come with Grok 5.

What did Musk say about AI development slowdown?

On September 12, Musk commented "Dario is right" on Anthropic CEO Dario Amodei's argument calling for a slowdown in AI development.

Large Language ModelsAI Safety & AlignmentITmedia AI＋Sep 15, 2026Sep 15, 2026, 19:01 JST

Musk: Grok 5 will reach AGI, Grok 4.8 training done this week

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3 Key Points

What happened
Musk said on X that Grok 4.8 finishes model training this week, Grok 4.9 is Astra/Fable-class, Grok 5 may beat everything, and AGI comes with Grok 5.
Why it matters
If the stated timeline holds, the next few model versions could mark the point where AGI is reached, making this a notable claim about how soon that milestone may arrive.
What to watch
The claim hinges on whether the stated training completion actually happens this week, so watch for any update on Grok 4.8's training status.

WHO IT HITSThis lands on AI developers and enterprise teams tracking frontier model releases, who may need to reassess which model families to build on if the stated performance and AGI timeline hold.

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Context & Analysis

Musk's comments came in a series of posts on X on September 13–14, where he walked through the expected progression of Grok versions. He framed each step as a comparison to existing models: Grok 4.7 is probably on par with Claude Opus 5, Grok 4.8 is a marked improvement, Grok 4.9 is probably Astra/Fable-class, and Grok 5 may be better than everything. This matters because the current latest version is Grok 4.6, so the timeline covers several releases in quick succession.

Separately, on September 12 Musk endorsed Anthropic CEO Dario Amodei's argument for slowing AI development, saying "Dario is right." That position sits alongside voices opposing a slowdown, including U.S. President Donald Trump, and Musk's stance is likely being watched given his role at SpaceXAI.

The progression hinges on whether the stated training completion actually happens this week and whether the performance comparisons hold up in practice. For teams choosing which models to use, the next few weeks may clarify whether Musk's AGI timeline is realistic or remains a forward-looking claim.

FAQ

When will Grok 4.8 finish training?: Musk said Grok 4.8 finishes model training this week.
Which version is expected to reach AGI?: Musk said AGI's achievement will come with Grok 5.
What did Musk say about AI development slowdown?: On September 12, Musk commented "Dario is right" on Anthropic CEO Dario Amodei's argument calling for a slowdown in AI development.

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