Grok Build 0.1 on API
Grok Build 0.1, our fastest coding model, is now available via the xAI API in public beta.
Model Watch · xAI
Grok Build 0.1
The coding model, in public beta. The old grok-code-fast names are aliases onto this now.
Status
released
Released
29 May 2026
Context
256K tokens
Price / 1M
$1.00 in, $2.00 out
Mentions
1
Threads
0
What is Grok Build 0.1?
Grok Build 0.1 is a model from xAI, built in the US. It's out, and you can call it today.
When did Grok Build 0.1 come out?
xAI released it on 29 May 2026. That date comes from the lab's own docs.
The tracker first logged the name on 29 May 2026 and last saw it on 29 May 2026.
What does it cost, and how much context does it hold?
| Lab | xAI |
|---|---|
| Built in | US |
| Status | released |
| API model id | grok-build-0.1 |
| Released | 29 May 2026 |
| Context window | 256K tokens |
| Max output | Not published |
| Input, per 1M tokens | $1.00 |
| Output, per 1M tokens | $2.00 |
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 $1.36 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 Build 0.1 | released | 29 May 2026 | 256K tokens | $1.00 | $2.00 |
| 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 5 | rumoured | — | — | — | — |
| Grok 4.3 | released | — | 1M tokens | $1.25 | $2.50 |
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 Build 0.1. Newest first, each one linking to where the lab published it.
Fri 29 May 2026
1Keep 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.
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