SPACEXSI 🔥: Grok 4.8 is currently in RL and expected to be “soft” rolled out to some Grok Bot users already this week.
Soft now, hard soon 🤖
xAI's Grok 4.8 enters reinforcement learning ahead of soft rollout
AIxAI says Grok 4.8 is in reinforcement learning, with evaluation scores starting to climb after pre-training finished. Elon Musk says a soft rollout to some Grok Bot users is planned for later this week, and that the model will differ substantially from Grok 4.7.
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We have dumped JAX/SGLang and rewritten the entire RL and inference stack from scratch in C/C++, which took some extra time. Training (aka pre-training) is done. Lot of cleanup was needed on the SFT data to get that mostly right. Now, 4.8 is in RL and the evals are starting to climb. We will do a soft rollout to Bot users later this week and see how it goes. Grok 4.8 will bear no resemblance to 4.7 (thankfully). It is not yet incredible, but, this time, the foundations are built right, so I expect it to evolve to be something special.View quoted post on X
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Original title: SPACEXSI 🔥: Grok 4.8 is currently in RL and expected to be “soft” rolled out to some Grok Bot users already this week.