xAI's update to Grok 4.20: it can now hold a whole book of text at once, watch video, and costs 40% less for the text you send in — with a few points higher on a broad skills test.
Compared with Grok 4.20 · the model it replaces
Can hold a whole book in mind at once
Context window — how much text it can read in one go
1M tokens
✦ new in Grok 4.3
Can now watch video, not just read text and see images
Video input — understanding moving footage directly
native
✦ new in Grok 4.3
Costs 40% less for the text you send it
Input price — what developers pay for the text they send in
40% cheaper
▲ vs Grok 4.20 · input only
Grok 4.6 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
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