A hidden price gets filled in by other sites, and the Perplexity cutover is nine days out.

What is new since the 16 September item: Perplexity's September changelog has four entries (custom MCP connectors, sign in with Perplexity for the MCP server, Gemini 3.8 Flash and GLM 5.3 Flash on the Agent API) and none of them moves the 27 September date. On the engine side, GitHub main still has `perplexity: "sonar"` at line 14 of src/adapters.ts and still posts to /chat/completions at line 91, last touched 2 August. The repository has one open pull request (autosend provenance, last updated 22 August) and no branch with "perplexity", "sonar" or "agent" in its name.

Method: 7,675 AI responses to pricing questions about the Cloud 100 software companies, collected 29 July to 10 August 2026 on ChatGPT, AI Mode, AI Overviews, Gemini, Copilot and Perplexity. "77% of the Cloud 100 do have a public pricing page." Those pages appeared somewhere in 46% of responses but first in only 12%. The most-cited outside sources were Vendr (18.7%), Reddit (18.6%) and G2 (15.9%). For one company with no public pricing page, "negative pricing language appeared in 67 of 76 AI responses" and "AI responses pulled from third-party sources", quoting a range of roughly $100 to $2,400 per user per month. The catch: a company that does publish its price still drew negative language in 72 of 76 responses ("notoriously opaque"). Limits: enterprise software, not coaching; vendor data; the authors say engines "regularly change citation behavior."

Method: 304 glossary pages on one Belgian agency site (conversal.be), Search Console over about 11 months, Bing Webmaster Tools, Otterly citation tracking on seven engines, and 19 days of server-side crawler logs. Google gave 568,000 impressions and 565 clicks (0.10%); Bing gave 1.70% on far smaller volume. Of 1,209 AI crawler visits to the glossary, 84.4% were training scrapers and 6.1% were on-demand fetches from a live user question. Copilot gave 6.10% of its citations to this folder, the highest of the engines. Limits: one site, one content type, and the author says it may not transfer.