# AI Stack Registry — Models Provider xai

- canonical: https://aistackregistry.com/snapshots/2026-04-15/models/xai/index.md
- text: https://aistackregistry.com/snapshots/2026-04-15/models/xai/index.txt
- json: https://aistackregistry.com/snapshots/2026-04-15/models/xai/index.json
- as_of: 2026-04-15T03:14:05+00:00
- models: 2

## Browse
- models_index_markdown: https://aistackregistry.com/snapshots/2026-04-15/models/index.md
- models_index_text: https://aistackregistry.com/snapshots/2026-04-15/models/index.txt
- models_index_json: https://aistackregistry.com/snapshots/2026-04-15/models/index.json
- providers_index_markdown: https://aistackregistry.com/snapshots/2026-04-15/models/providers/index.md
- providers_index_text: https://aistackregistry.com/snapshots/2026-04-15/models/providers/index.txt
- providers_index_json: https://aistackregistry.com/snapshots/2026-04-15/models/providers/index.json

## Catalog
- provider=xai model_id=grok-4-1-fast-non-reasoning canonical=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-non-reasoning/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-non-reasoning/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-non-reasoning/recommended_defaults.json
- provider=xai model_id=grok-4-1-fast-reasoning canonical=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-reasoning/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-reasoning/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-reasoning/recommended_defaults.json

## Notes
- This provider index is the human-readable drill-down for one provider's catalog.
- Follow model bundle URLs from this index; do not infer sibling artifact paths.