Model Watch · xAI
Grok 4.3
Twice the context of the flagship at a bit over half the price. xAI never posted a launch note for it, so there's no date to give you.
What is Grok 4.3?
Grok 4.3 is a model from xAI, built in the US. It's out, and you can call it today.
When is Grok 4.3 coming?
No date. xAI hasn't given one, so we haven't made one up. The mentions further down are where a date would show up first.
What does it cost, and how much context does it hold?
| Lab | xAI |
|---|---|
| Built in | US |
| Status | released |
| API model id | grok-4.3 |
| Released | Not yet |
| Context window | 1M tokens |
| Max output | Not published |
| Input, per 1M tokens | $1.25 |
| Output, per 1M tokens | $2.50 |
List prices per million tokens, read off the lab's own docs. Caching, batching and volume deals all cut the real number, so treat this as the ceiling. Check the source before you budget against it.
At 700 words in and 500 out, twenty times a day, that works out around $1.70 a month. Put your own numbers in, see every xAI price, or put it next to another model.
How does it compare to xAI's other models?
| Model | Status | Date | Context | In / 1M | Out / 1M |
|---|---|---|---|---|---|
| Grok 4.3 | released | — | 1M tokens | $1.25 | $2.50 |
| Grok 4.6 | released | 12 August 2026 | 500K tokens | $2.00 | $6.00 |
| Grok 4.5 | released | 16 July 2026 | 500K tokens | $2.00 | $6.00 |
| Grok Build 0.1 | released | 29 May 2026 | 256K tokens | $1.00 | $2.00 |
| Grok 5 | rumoured | — | — | — | — |
A dash means the lab hasn't published that number for that model.
Every mention we've logged
Every tracked post, release, changelog entry or incident whose title or summary names Grok 4.3. Newest first, each one linking to where the lab published it.
Nothing yet. The name hasn't appeared in a tracked source.
Grok 4.3 is part of the Grok 4 family, which is where the point releases sit next to each other.
Keep reading
The release timeline is every model we know about, filterable by lab, country and date. The tracker is the live feed these mentions come from, and Model Watch is the whole catalogue on one page.
More from xAI:
- Grok 4.6 · released
- Grok 4.5 · released
- Grok Build 0.1 · released
- Grok 5 · rumoured
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