PANews, citing Musk, said Grok 4.8 has completed pre-training and plans to roll it out to a small group this week
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AT A GLANCE
According to PANews, Musk said Grok 4.8 has completed pre-training, and xAI plans to roll it out to Bot users in a small-scale release later this week.
Article
Musk: Grok 4.8 has completed pre-training, small-scale rollout to begin later this week
PANews November 10 news, Musk posted disclosing the progress of Grok 4.8: pre-training is complete, currently in the reinforcement learning (RL) stage, evaluation scores are starting to rise. xAI plans to first push a small-scale rollout (soft rollout) to Bot users later this week. Musk stated that the team has abandoned JAX/SGLang and rewritten the entire reinforcement learning and inference system from scratch using C/C++, which is one reason for the delay in progress; supervised fine-tuning (SFT) data has also undergone extensive cleaning. He described Grok 4.8 as "completely different" from 4.7, saying it is "not yet outstanding," but the underlying foundation has been built.
PANews reported on November 10 that Musk stated Grok 4.8 has completed pre-training and is currently in the reinforcement learning (RL) phase, with evaluation scores beginning to rise.
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xAI plans to roll out Grok 4.8 to Bot users on a limited basis later this week.
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Musk stated that the team has abandoned JAX/SGLang and rewritten the entire reinforcement learning and inference system from scratch in C/C++, which is one of the reasons for the delay in progress.
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Musk stated that the Supervised Fine-Tuning (SFT) data underwent extensive cleaning.
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Musk said Grok ["4.8", "4.7"] are "completely different," "not yet outstanding," but the underlying foundation has already been laid.
AI-assisted interpretation
The following is analysis, separate from reported facts. Verify important claims independently.
This is a development progress note, not a formal full launch announcement. According to Musk, Grok 4.8 has completed pretraining but is still undergoing reinforcement learning; the next plan is to first roll it out to Bot users in a small-scale release. He also emphasized the system rewrite and data cleanup, and made clear that the current version cannot yet be called outstanding.
Why it matters to readers
This message provides the development stage and planned rollout scope of Grok 4.8, and also offers a partial explanation for the delay in progress; it does not yet prove that the product has been launched or that its performance has met expectations.
When reading, one should distinguish between "has completed pretraining" and "the product is already mature," and should also distinguish between "a small-scale rollout plan" and "already open to all users." The original text does not provide specific evaluation scores.
Risks and unknowns
The information is PANews's paraphrase of Musk's statements, and the development progress described has not been independently verified in the evidence.
Small-scale push is still the plan, and the actual push time, the specific Bot user scope, and the results have not yet been confirmed.
The original text does not provide specific evaluation scores, evaluation methods, or performance comparisons with 4.7, so it is impossible to determine the extent of improvement.
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Pretraining
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