Seven fresh signed-out consumer surfaces were checked September 22, approximately 00:15–00:19 UTC. Zero completed answers were obtained; these are access failures, not model refusals.
| Surface | Outcome | Prompt submitted | Model answer |
|---|---|---|---|
| ChatGPT | HTTP 403 challenge | No | No |
| Claude | HTTP 403 challenge | No | No |
| Perplexity | HTTP 403 challenge | No | No |
| Copilot | Regional-unavailability message; composer filling timed out | No | No |
| Grok | Required sign-up after C3 entry | Yes | No |
| Mistral Le Chat | HTTP 403 challenge | No | No |
| Duck.ai | C3 submission returned temporary-unavailability error 02f8 | Yes | No |
C3 was the exact latest-price-list prompt shown in the article. No controls were bypassed or accounts created. A direct ChatGPT follow-up at approximately 00:53 UTC again encountered a challenge before submission. A later user-supplied ChatGPT screenshot, full answer and citation URL constitute the separate case in the article; they do not retroactively change these automated access outcomes. The API pilot is also separate. No comparative product success/failure rate is inferred from access blocks.