It seems the Merlin's Chrome extension - Side Panel - still uses an old interface like the one for the Merlin Web app. The difference is that you can switch to a new UI in the Web app.
Please update UI of the Chrome extension, especially the models list and make it consistent with Merlin Web app and Merlin Mobile app.
Currently Merlin Chrome extension's model list includes:
  • ChatGPT 3.5 - 1 query (archived)
  • ChatGPT 4o Mini - 1 query
  • ChatGPT 4o - 15 queries
  • Llama 3.1 405B - 15 queries
  • Claude 3.5 Sonnet - 25 queries
  • Claude 3 Haiku - 1 query
  • Claude 3 Sonnet - 10 queries (archived)
  • Claude 3 Opus - 50 queries (archived)
  • Gemini 1.5 Pro - 30 queries (archived and inconsistent in queries number)
  • Gemini 1.5 Flash - 1 query
  • Mistral Large - 25 queries (archived)
  • Mixtral - 1 query (archived)
So overall it includes 6 archived models, one of which - Gemini 1.5 Pro - inconsistent in number of queries (in Chrome extension it costs 30 queries while in Web and Mobile app it costs 15 queries).
Additionally, Merlin Chrome extenstion lacks new models such as O1, O3 mini, DeepSeek and Gemini 2.0.