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If you have a ChatGPT subscription with Codex access, connect it to use Codex models in Slashy’s AI agent chat, alongside the Claude models in the picker. You choose the Codex model and how hard it thinks, with an optional faster tier.

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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, the Codex card in the AI section of Settings, Integrations shows your ChatGPT account and plan. You can also start the connection from the agent chat’s model picker: choose Connect Codex from the list and it opens the same Settings panel. If your session has expired, the row reads Reconnect instead.
Settings, Integrations with the Codex card
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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Choose a Codex model

Open the model picker at the bottom of the agent chat and pick one of the Codex models. Your next messages in that conversation run on your connected ChatGPT subscription instead of a Claude model.
  • Astra, listed only when your ChatGPT plan includes it
  • Sol
  • Terra
  • Luna
The picker shows only the models your plan offers. If your plan offers no choice, you see a single Codex row.

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Set the reasoning effort

Hover a Codex model in the picker to open its reasoning menu, then choose how much effort it spends before answering:
  • Low
  • Medium
  • High
  • Extra High
  • Max
The menu lists only the efforts your plan supports.

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Fast mode

When a Codex model is selected, a lightning-bolt toggle appears next to the model picker. It works with every Codex model. 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 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

When your ChatGPT plan’s usage limit is reached, Slashy tells you and keeps the conversation going on your normal Slashy model:
  • The picker chip changes to Limit reached, and the Codex rows dim and show when they reset, for example “Resets 4:27 PM”.
  • The Codex card in Settings, Integrations reads “Limit reached. Slashy is using your normal model until” the reset time.
Once your usage resets, select a Codex model again to pick 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

The model picker 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.