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Slashy generates drafts, autocomplete, and agent replies with Claude. Sonnet is the default for every account and handles most everyday writing. Opus is available for the moments when you want a more nuanced reply, and runs on your own Anthropic API key.

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Default: Claude Sonnet

Sonnet writes every draft, every autocomplete suggestion, and every agent response unless you change it. It’s fast, matches your voice well, and is the right pick for routine replies, scheduling back-and-forth, and short follow-ups. You don’t need to configure anything to use Sonnet. It’s on by default for new accounts.

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When to switch to Opus

Opus is the right choice for:
  • Longer, layered replies. Multi-paragraph responses to investor updates, technical answers to a customer, anything that needs structure.
  • Nuanced tone. A note that needs to apologize without being deferential, push back without being curt, or thread a careful line in a sensitive thread.
  • Complex reasoning. Drafts where the model needs to weigh several pieces of context (a long thread, a calendar conflict, a CRM record) before writing.
Opus runs on your own Anthropic API key. Slashy doesn’t bill for Opus usage; Anthropic does.

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Bring your own Anthropic key

The first time you pick Opus, Slashy prompts for an Anthropic API key inline in the compose window. You don’t have to leave the editor. Don’t have a key yet? See Get an Anthropic API key.
1

Open the model picker

Click the model name above the compose box.
2

Select Opus

Choose Opus from the dropdown.
3

Paste your key

A prompt appears asking for an Anthropic API key. Paste it and confirm. The key is stored on your account only.

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Manage the key

Once saved, the key is available everywhere Opus is offered. To rotate, view, or remove it, open Settings, AI.
The key is stored in your account only and is not shared across workspace members. Each user brings their own.

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Per-message vs default

The model picker in compose changes the model for the current draft only. To make Opus the default for every new draft, open Settings, AI and set Default model to Opus. You can still flip back to Sonnet per message from the picker.
A common pattern: keep Sonnet as the default for speed, switch to Opus only for the hardest one or two replies a day.

Autocomplete

Inline suggestions while you type.

Editing drafts

Refine generated text.

Connect your Codex subscription

Use your own ChatGPT/Codex plan in agent chat.

Customize the agent

Tune voice and instructions.

AI memories

What Slashy remembers about you.

AI privacy

How your data is handled.