# openrouter/x-ai/grok-4-fast:free · reasoning_enabled true

This valid reasoning-enabled response predates the following day’s reasoning-disabled run; each keeps its own documented date. Source-reported model attribution is not independently authenticated. Date follows the response timestamp in the source log; article publication is separate. Generation date is not independently authenticated. Original media archived locally without redrawing or improving.

- Recorded date: 2025-09-20
- Date precision: Day
- Date basis: source-reported-response-timestamp
- Model (source label): openrouter/x-ai/grok-4-fast:free
- Model attribution: Source-reported, not independently authenticated
- Creator / publisher: Simon Willison
- Format: Static SVG
- Prompt category: Source-documented test
- Original prompt: Generate an SVG of a pelican riding a bicycle
- Last updated: 2026-10-01
- caseRole: case
- caseNumber: 133
- timelineVisible: True
- datePrecision: day
- dateBasis: source-reported-response-timestamp
- Original source: https://simonwillison.net/2025/Sep/20/grok-4-fast/
- Archive record: https://pelicanmap.aveniqa.com/en/specimens/simon-late-36-1-2025-09-20/
- Rights: Works belong to their original creators. Archiving does not change their licenses.
- Media: https://pelicanmap.aveniqa.com/media/collected/2026-10-01-nile-late/simon-late-36-1-2025-09-20.svg
  Source: https://gist.githubusercontent.com/simonw/539719a1495253bbd27f3107931e6dd3/raw/d6993587fc97e35cf90fc4f8e9ea6bc5128d8965/grok-4-fast-reasoning.md
- Media: https://pelicanmap.aveniqa.com/media/collected/2026-10-01-nile-late/simon-late-36-1-2025-09-20.png
  Source: https://static.simonwillison.net/static/2025/grok-4-fast-reasoning.png