New smart assistant options and more free choices added

We've added the newest Claude Opus 4.6 alongside several fresh free assistants like GPT-OSS 120B and Mistral Small 3.1, giving you more variety and power to choose from. At the same time, we removed a couple of older free assistants that are no longer supported to keep things running smoothly.

Also, one of the experimental assistants, Gemini 2.5 Pro, is now fully stable, so you can rely on it with confidence. Overall, this means better and more reliable smart options for you to explore and use.