Grok 4.3 beta is now available for Heavy subscribers! Musk: The true flagship version will finish initial training in 5 days.

📄Full Article· Automatically extracted by trafilaturaGemini 翻譯1257 words

Grok 4.3 beta has been available to SuperGrok Heavy subscribers ($300/month) since April 17. On the 18th, X user Mark Kretschmann posted that this version features 1T parameters, double the size of Grok 4.20. Elon Musk immediately clarified in the same thread that the true 1T flagship is 5 days away from finishing its initial training. (Previous coverage: SpaceX lost nearly $5 billion after merging with xAI! Burning $1 billion in compute costs every month) (Background: Musk shows AI5 chip design complete, Dojo3 revived, Tesla AI6 in development) Grok 4.3 beta appeared in the Grok.com dropdown menu labeled "Early Access," available only to $300/month SuperGrok Heavy subscribers, while regular $30 SuperGrok plan users can only see it. This version can handle PDF, PPT, and Excel generation, as well as video input and enhanced reasoning, with the context window jumping from the previous 128K to 2M tokens (!!). This is still 0.5T, but a more recent training checkpoint. 1T model is ~5 days away from finishing initial training. Will be a major step change improvement in coding, long context and skills. The SpaceXAI model factory is finally working. Should be an improved base model… — Elon Musk (@elonmusk) April 18, 2026 Today, X user Mark Kretschmann stated that this version features 1T parameters, twice that of Grok 4.20, with a significantly longer training time. A few hours later, Musk replied to clarify: "The current 4.3 (beta) is still 0.5T, just a more recent training checkpoint." 1T flagship version is 5 days away from finishing initial training In his clarification, Musk added that this version will bring a step function level of improvement in coding, long context, and various skills. SpaceXAI factory is running 7 models simultaneously, with the largest scaling up to 10T Musk revealed that the SpaceXAI Colossus 2 model factory is operational, currently training: two 1T models, two 1.5T models, one 6T model, one 10T model, and the Imagine V2 image model. The 10T pre-training is expected to take another two months. Grok Computer launched simultaneously Launched alongside Grok 4.3 beta is Grok Computer, xAI's autonomous PC agent capable of operating applications, filling out forms, and executing multi-step desktop tasks. Grok 4.3 serves as the reasoning engine, while Grok Computer acts as the action layer, with a wider beta now open to some SuperGrok accounts.

Data Status✓ Full text extractedRead Original (動區 BlockTempo)

🔍Historical Similar Events· Keyword + Asset Matching4 items

2026-04-22

SpaceX secures option to acquire Cursor: $60 billion to buy the AI development tool or a $10 billion breakup fee

Similarity 120%關鍵字馬斯克同分類 zh

2026-04-21

Musk refuses summons from French prosecutors; investigations into Grok-generated deepfake porn and X's algorithm continue

Similarity 120%關鍵字 grok同分類 zh

2026-04-20

xAI quietly launches Grok 4.3: Directly generates Word, PPT, and Excel files, trampling Microsoft's moat

Similarity 120%關鍵字 grok同分類 zh

2026-04-19