title: Use an Existing Subscription - Omega description: Use ChatGPT, Claude, Copilot, OpenCode, Cursor, and other existing AI subscriptions in Omega.
Use an Existing Subscription
Use this page when you already pay for an AI product and want to know how it fits into Omega.
Some subscriptions work as Omega model providers. Others are used through an External Agent or terminal CLI.
| Subscription | Omega AI features | External Agent via ACP | Terminal Thread | Notes |
|---|---|---|---|---|
| Zed Pro, Business, or Student | Not available in Omega | No | No | Zed-hosted plans are not Omega plans |
| ChatGPT Plus / Pro | ChatGPT Subscription | Codex where supported | Codex CLI | Sign in with OpenAI in Omega; separate from OpenAI API keys |
| Claude Pro / Max | No direct Omega LLM provider path | Claude Agent | Claude Code | Separate from Anthropic API keys |
| GitHub Copilot | GitHub Copilot Chat; Copilot edit prediction | Copilot agent where available | CLI where available | Requires Copilot/Copilot Chat auth |
| OpenCode Zen / Go | OpenCode provider | OpenCode agent where available | opencode CLI |
Requires OpenCode API key; subscription affects available models |
| Cursor subscription | No Omega LLM provider path | Cursor External Agent where available | Cursor CLI/TUI where available | Use agent/CLI paths instead of Omega LLM provider settings |
ChatGPT Plus / Pro {#chatgpt}
ChatGPT Plus and Pro can be used through Omega's ChatGPT Subscription provider. Sign in with OpenAI in Omega; no separate OpenAI API key is required. This provider is separate from the Codex external agent, which owns its own authentication and configuration.
OpenAI API access is separate. If you have OpenAI API credits or API billing, use Use API Access.
Claude Pro / Max {#claude}
Claude Pro and Max subscriptions are separate from Anthropic API credits. Use Claude Agent or Claude Code where supported if you want subscription-backed Claude behavior.
For Anthropic API access, use Use API Access.
See What Anthropic's New Claude Billing Means for Zed Users for more context.
GitHub Copilot {#github-copilot}
GitHub Copilot can be used as a Copilot Chat model provider for Omega AI features where supported. Copilot can also be used for Edit Prediction.
If you use a Copilot agent or CLI, that setup is owned by Copilot. See External Agents and Terminal Threads.
OpenCode Zen / Go {#opencode}
OpenCode is a first-class language model provider in Omega. If you think of Zen or Go as your OpenCode subscription, the Omega setup path is still Use API Access: enter an OpenCode API key, then choose which OpenCode models to show. Omega does not sign in to OpenCode with OAuth or detect your subscription directly.
Cursor {#cursor}
Cursor subscriptions do not configure Omega's LLM provider settings. Use a Cursor External Agent or Cursor CLI/TUI where available.
Subscriptions Used Through Agent Harnesses {#agent-harnesses}
Some harnesses, CLIs, and External Agents can authenticate to ChatGPT, Claude, Copilot, or other subscriptions through their own flows. In those cases, Omega hosts the External Agent or Terminal Thread, but the harness owns auth and model behavior.
Pi Coding Agent is an example: Pi is a harness, not the subscription. Configure provider auth in Pi.
DeepSeek {#deepseek}
DeepSeek paid usage, top-ups, and API billing are API access in Omega, not subscription sign-in. Use Use API Access.