TL;DR
- OpenAI's 7 October 2026 customer story says the Radisson Hotels plugin in ChatGPT was built and launched in six weeks; it shows hotels on a map, compares prices and sends users to Radisson's site to book.
- Radisson's sponsored ChatGPT Ads campaigns started in July and have expanded to more markets in Europe and beyond; OpenAI names no markets and gives no spend.
- The MCP server and APIs built for the plugin also power Radisson's ChatGPT Ads experience, according to OpenAI.
- After a recent ChatGPT update, users who installed the plugin no longer type @RadissonHotels; ChatGPT shows it automatically when relevant.
Radisson Hotel Group says its hotel plugin inside ChatGPT converted visits to bookings at about 1.5 times the rate of its organic search in July and August 2026, according to a customer story OpenAI published on 7 October 2026. The same story says 54% of the recorded checkout and booking events from Radisson's sponsored ChatGPT Ads campaigns were attributed to ad views rather than clicks. These are early figures from a case study written by OpenAI, the company that sells the ads, so they are a vendor account rather than an independent measurement, and several details needed to judge them were not published.
What OpenAI published on 7 October 2026
The story appears on OpenAI's site as Radisson Hotel Group brings hotel discovery into ChatGPT. It describes two things Radisson is doing inside ChatGPT at the same time: an organic presence through a branded plugin, and paid presence through sponsored ChatGPT Ads. OpenAI frames them as one integrated discovery strategy.
Radisson Hotel Group, according to the story, brings together ten hotel brands across EMEA and APAC, with more than 1,640 hotels in operation and under development. The plugin was built by a member of the OpenAI Partner Network that already worked on Radisson's direct digital channel. OpenAI says the team used agentic development to build and launch the Radisson Hotels plugin in six weeks.
What the plugin does
The plugin lets a ChatGPT user see Radisson hotel suggestions on a map, compare prices and look at hotel amenities in detail inside the chat. To book, the user continues to Radisson's own website. The plugin does not complete the booking inside ChatGPT; it hands the traveller over to Radisson's direct booking channel.
OpenAI also points to a recent ChatGPT change. Users no longer have to type @RadissonHotels before a request. If they have the plugin installed, ChatGPT shows it automatically whenever it is relevant to what they ask.
The figures, and what each one measures
OpenAI headlines three numbers in the story. The table below lists each one with the period and the basis OpenAI gives, plus the background figures about the company, all taken from the story itself.
| Figure | What OpenAI says it measures | Period stated |
|---|---|---|
| About 1.5x | Plugin visit-to-booking conversion rate compared with Radisson's organic search | July to August 2026 (early results) |
| 54% | Share of recorded checkout and booking events from the sponsored ChatGPT Ads campaigns attributed to ad views (view-through) | Not stated; campaigns began in July |
| 6 weeks | Time to build and launch the ChatGPT plugin | Not applicable |
| 10 brands, 1,640+ hotels | Radisson Hotel Group's size, counting hotels in operation and under development, across EMEA and APAC | As of the story |
The 1.5x conversion figure
OpenAI states that early results from the plugin show a visit-to-booking conversion rate "approximately 1.5 times" Radisson's organic search for July to August 2026. Velit Dundar, Vice President of Global Ecommerce at Radisson Hotel Group, is quoted saying the plugin is "converting at around 1.5 times organic search". The comparison is a ratio. The story does not give the underlying conversion rates, the number of plugin visits or bookings, or how Radisson defines a visit from organic search for this comparison.
The 54% view-through figure
For the paid side, OpenAI says Radisson is among the hospitality brands running sponsored advertising in ChatGPT. Since launching in July, its campaigns have expanded into more markets across Europe and beyond. OpenAI says more than half of the campaigns' recorded checkout and booking events were attributed through view-through measurement, and gives the figure as 54% in the story's summary. In plain terms, most of the checkout and booking events credited to the ads came from people who saw an ad but are not recorded as having clicked it.
OpenAI presents that as extending Radisson's view of discovery beyond direct ad clicks. It is worth reading carefully. A view-through share says how credit was assigned, not how many bookings the ads caused. The story does not state the attribution window, how view-through and click-through events were deduplicated, whether any incrementality test was run, the spend, or the number of events behind the percentage.
One back end for the plugin and the ads
A technical detail in the story is easy to miss. OpenAI says the MCP server and APIs built for the Radisson plugin are also powering the ads experience and will play a role in other features to come. The story names that infrastructure only as an MCP server and APIs. Read plainly, it means the system built so ChatGPT could show Radisson's hotel suggestions, prices and amenities in the plugin is being reused for the paid ad experience.
For other advertisers, the practical reading is that building a plugin and buying ChatGPT Ads are not necessarily separate projects. The story does not explain how the ads use that infrastructure in detail, so it would be a guess to say exactly what an ad can now do with it.
What the case study does not tell you
This is OpenAI's own customer story, written to show results from its products. It quotes Radisson executives and two people from the partner that built the plugin, and it presents early numbers. None of that makes the figures wrong, but readers should keep the gaps in view:
- No absolute numbers: no spend, bookings, revenue, visits or conversion rates, only a ratio and a percentage.
- No period for the 54% figure beyond the campaigns having started in July.
- No list of markets. OpenAI says "additional markets across Europe and beyond" without naming them, and does not say whether any Radisson campaign or plugin activity runs in Thailand.
- No attribution settings, and no incrementality or holdout result.
- No description of how many ChatGPT users have the plugin installed. Radisson's next priorities, according to the story, include encouraging plugin adoption and adding functionality inside ChatGPT.
Why this matters for AI search visibility
The plugin is the organic half of the story, and it is where the GEO angle sits. A brand's visibility inside ChatGPT has usually been discussed in terms of whether the model mentions or cites the brand in its answer. Radisson's plugin is a different route: a branded tool that ChatGPT can now show automatically to users who installed it, without the user naming the brand. OpenAI frames the plugin as a way to reach travellers earlier in trip planning, since many now shortlist hotels in AI tools before they visit a hotel website.
That does not replace the work of being cited in answers for people who have not installed anything. It adds a second surface that a brand controls more directly, with its own hotel details and prices instead of whatever the model happens to say about it.
What this means for Thai marketers
OpenAI began rolling out ChatGPT Ads in Thailand on 23 September 2026, as Relevant Audience reported at the time, and businesses with a legal entity in Thailand can buy the ads through self-serve Ads Manager. That means the paid half of Radisson's approach is already open to Thai hotels, travel brands and other advertisers. The organic half, a plugin built on an MCP server and APIs, is a separate development project.
For a Thai hotel group or travel business, Radisson's story offers a structure to test rather than a benchmark to copy. Three practical steps follow from it. First, if you run ChatGPT Ads, report view-through and click-through conversions separately, because a single blended number would hide how much of the credit came from views. Second, before you commit to a plugin, check whether the systems that hold your rates and hotel details can be exposed through APIs, because that is what both Radisson's plugin and its ads rely on. Third, keep separate the questions of whether ChatGPT mentions your brand in answers and whether your own tool appears in the conversation, since they are measured differently.
FAQ
How much better did Radisson's ChatGPT plugin convert than organic search?
About 1.5 times, according to OpenAI's 7 October 2026 customer story, which reports that early visit-to-booking conversion from the plugin was approximately 1.5 times Radisson's organic search for July to August 2026. The story does not give the underlying conversion rates or booking volumes.
What does the 54% ChatGPT Ads figure mean?
It means 54% of the checkout and booking events recorded for Radisson's sponsored ChatGPT Ads campaigns were attributed to ad views rather than ad clicks. It describes how credit was assigned under view-through measurement, not how many bookings the ads caused, and OpenAI did not state the attribution window or the period.
Is this an independent study?
No, it is a customer story published by OpenAI, which sells ChatGPT Ads and hosts the plugin platform. It includes quotes from Radisson executives, but the figures have not been published with an independent audit or methodology.
Can Thai businesses run ChatGPT Ads like Radisson?
Yes for the ads, since OpenAI began rolling out ChatGPT Ads in Thailand on 23 September 2026 with self-serve buying for businesses that have a Thai legal entity. Building a branded plugin is a separate technical project, and the story does not say whether Radisson's plugin or campaigns cover Thailand.
Do users have to type the brand name to use a ChatGPT plugin?
No longer, according to OpenAI. After a recent ChatGPT update, users who have installed the Radisson plugin no longer need to type @RadissonHotels, and ChatGPT shows the plugin automatically when it is relevant.
If you are weighing ChatGPT Ads for a Thai brand, Relevant Audience's ChatGPT Ads service can help set up campaigns and reporting that separate view-through from click-through results, and our generative engine optimisation work covers how your brand appears in AI answers.
