Model · Multimodal language model

Grok 4.20 (Reasoning)

An API-served image-and-text reasoning Grok snapshot release with the fixed dated identity grok-4.20-0309-reasoning and a 1,000,000-token context, without downloadable model weights.

Developer

xAI

Distribution

Developer API · Third-party hosting

Artifact licensing

Proprietary access

License scope

Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.

Licenses

xAI Enterprise Terms of Service · xAI Acceptable Use Policy

Boundary

This record represents the Grok 4.20 reasoning snapshot release of March 9, 2026 under the fixed API model name grok-4.20-0309-reasoning. The non-reasoning variant, the multi-agent sibling, Oracle OCI hosted paths, consumer apps, and later Grok releases remain separate service or product boundaries.

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