Grok 4.20
xAI · · 32 days after Grok Imagine Video
Partially verified
0 of 1 published values traced to a source2 primary sources, 2 archived2 not disclosed by the lab1 not researched yet
Why this status
Cited to official documentation. Not verified because the release date could not be found in any cited primary source — the value may be correct, but this dataset cannot yet show where it came from.
What these states mean · How records are judged · Has this record changed?
xAI's release notes list Grok 4.20 as live in March 2026 and give no day; the date is recorded at month precision rather than inferred. It is served as grok-4.20-0309-reasoning and grok-4.20-0309-non-reasoning — the 0309 is a snapshot identifier, not a stated release date.
Details
| Released | March, 2026 |
|---|---|
| Company | xAI |
| Family | Grok |
| Lineage | after Grok 3 · before Grok 4.5 |
| Released alongside | Grok 4.20 Multi-agent |
| Era | Agentic systems |
| Type | Language model · LLM |
| Modalities | Not recorded |
| Capabilities | Reasoning |
| Weights | Proprietary |
| Licence | Not applicable — proprietary |
| Context window | Not disclosed |
| Parameters | Not disclosed |
Current information, elsewhere
This record is a historical one: every figure above is traced to a dated primary source. For what is true today — live pricing, current rankings, availability — these are better maintained than anything here could be.
- Current price and providers OpenRouter ↗
- Current benchmark scores Artificial Analysis ↗
Sources
Record status: partly verified · confidence 60/100 · 2 of 2 primary
Cited to official documentation. Not verified because the release date could not be found in any cited primary source — the value may be correct, but this dataset cannot yet show where it came from.
Primary means published by the organisation that made the model. Verified records require at least one.
Grok family
- Grok-1 November 3, 2023
- Grok 3 February 19, 2025
- Grok 4.20 March, 2026
- Grok 4.20 Multi-agent March, 2026
- Grok 4.5 July 8, 2026
- Grok 4.6 August 12, 2026
- Grok 4.7 September 21, 2026
What changed from Grok 3
Compared with the previous release in this series. A field appears only when both records state a value — where one does not, it is listed as uncomparable rather than dropped, because a gap in our research is not a finding about the model.
Not comparable: Context window (not disclosed for both releases); Parameters (not disclosed for both releases); Capabilities and modalities (not researched on both releases)
Compare Grok 4.20 with another model →
See Grok 4.20 on the interactive timeline →