One-sentence summary
This dataset summarizes vendor adoption of the common robots.txt AI-training opt-out signal announced October 30, 2026: Anthropic already adopted, Google and Microsoft plan 2027, OpenAI in coming months, and Meta supports but has not committed.
Notes
- The signal is a common policy label in robots.txt, discussed in the IETF AI-preferences working group.
- Announced October 30, 2026; timing per reports including The Verge.
- Each vendor's existing controls remain.
Core Data
| model | Adoption status | Expected | Note |
|---|---|---|---|
| Anthropic | Adopted | Live | First to ship |
| Plans to support | 2027 | Keeps Google-Extended | |
| Microsoft | Plans to support | 2027 | Adds training/anchoring opt-outs |
| OpenAI | Voluntary join | Coming months | No firm date |
| Meta | Supports the idea | Not committed | Push commercial terms to Nov 20 |
Field Notes
- Google-Extended: Google's crawler control since 2023; allowed content may appear in Gemini answers.
- Microsoft granularity: Sites can opt out of training and anchoring separately without affecting Bing indexing.
- IETF process: Remaining AI-preference vocabulary is still under discussion.
