What the evidence says
These facts come from the reviewed Epoch AI catalog artifact and its linked primary record. They describe the model. They do not rank it.
- Developer [1]
- xAI
- Released [1]
- February 17, 2026
- Domains [1]
- Language
- Tasks [1]
- Language modeling/generation
- Access [1]
- API access
- Weights [1]
- Closed
Where it may fit
These are evidence-bounded screening suggestions, not performance claims or purchase recommendations.
Hosted language workflows on xAI's API
Consider it for language generation delivered through xAI's managed API where self-hosting is not required.
Evidence fields: tasks, access [1]
Grok-line screening
Consider it when evaluating xAI's Grok releases; the name identifies the line, and the record documents language generation.
Evidence fields: name, tasks, openWeights [1]
Limitations
The record lists a single documented task and does not provide benchmark results, price, context window, latency, or safety evaluations. The separately pinned LMArena snapshot lists a Grok 4.20 Beta 1 entry that does not exactly match this catalog record, so no rating is shown here.
Current standing
According to the LMArena snapshot published July 12, 2026, no exact match for this catalog record appears in the style-controlled text category, so this page reports no current rating for Grok 4.20.