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If you have a ChatGPT subscription with Codex access, connect it to use as a model in Slashy’s AI agent chat, alongside Sonnet, Opus, and Haiku.

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Connect Codex

1

Open Settings

Press Cmd+,, then choose Integrations in the sidebar.
2

Connect

Find Codex and click Connect.
3

Sign in on OpenAI

Slashy shows a one-time code and opens OpenAI’s device sign-in page in a new tab. Enter the code there to authorize.
Once connected, Slashy shows your ChatGPT account and plan next to Codex in Settings. You can also start the connection from the agent chat’s model picker: choose Codex from the list, and if you’re not connected yet, it opens the same Settings panel.
Settings, Integrations showing Codex connected under the AI section, alongside the Claude API key option
Codex powers the AI agent chat on web and iMessage. Automations and AI drafts continue to run on Slashy’s own models.

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Using Codex in agent chat

Open the model picker at the bottom of the agent chat and select Codex. Your next messages in that conversation run on your connected ChatGPT subscription instead of Slashy’s default model.

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Fast mode

When Codex is selected, a lightning-bolt toggle appears next to the model picker. Turning it on switches to a faster response tier that uses more of your Codex usage per message, about 1.5x faster at roughly 2.5x the usage cost. Toggle it off to return to Codex’s standard speed.
Agent chat with Codex selected in the model picker and the Fast mode lightning-bolt toggle turned on
Save Fast mode for messages where you’re waiting on the response, and leave it off for anything you can let run in the background.

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If you hit your Codex limit

If your ChatGPT plan’s usage limit is reached mid-conversation, Slashy automatically falls back to your normal Slashy model so the conversation keeps going. Once your Codex usage resets, selecting Codex again picks up where you left off.

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Disconnecting

In Settings → Integrations, click Disconnect next to Codex. Slashy stops using your ChatGPT subscription for agent chats immediately; your other AI features are unaffected.

AI models in Slashy

Sonnet, Opus, and bringing your own Anthropic key.

Sidebar Agent & Command Palette

Chat with the agent and run commands.

Agent autonomy

What the agent can and cannot do on its own.

Voice

Talk to the agent instead of typing.