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Choosing your AI model and assistant

Pick from Claude Sonnet 4.6, Claude Opus 4.8, GPT-5.5, GPT-5.4 mini, or Gemini 2.5 Flash. Choose a built-in or custom assistant persona, and set a workspace default under Profile.

Written by Speak Ai

Selecting a model for a conversation

The chat input toolbar includes a model picker (the sparkle icon with the model name) that lets you choose which AI model powers the current conversation. The available models as of this writing are:

  • Claude Sonnet 4.6 (Anthropic), fast and balanced. The default for most workspaces.

  • Claude Opus 4.8 (Anthropic), Anthropic's highest-capability model; includes extended thinking. Indicated by a sparkle icon in the picker.

  • GPT-5.5 (OpenAI)

  • GPT-5.4 mini (OpenAI)

  • Gemini 2.5 Flash (Google)

Models that support extended thinking are marked with a sparkle icon next to their name in the dropdown. The model is fixed for the life of a conversation; to switch models start a new chat.

Choosing an assistant

Next to the model picker is an assistant picker (the person icon). Assistants give the model a persona and set of instructions that shape how it responds. The built-in assistants are:

  • General, default, all-purpose responses

  • Researcher, structured analysis and synthesis

  • Marketer, copy and content-oriented responses

  • Sales, deal and prospect-focused responses

  • Recruiter, hiring and candidate-oriented responses

You can also create custom assistants with your own instructions. Click Create new assistant at the top of the assistant picker dropdown, or manage your assistants at Profile under the AI Assistant section. Custom assistants appear under Your Assistants in the picker.

Setting a workspace default model

To avoid picking a model every time, set a default at Profile > AI Assistant. Under the Default AI model section, choose the model you want from the dropdown and the setting saves immediately. Individual chats can still override the default using the model picker in the input toolbar.

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