I use several AI providers and agent harnesses, and I keep running into a surprisingly basic problem: the naming is all over the place.

Is Codex a model or a harness? Is SuperGrok the app or the subscription? Is Zen OpenCode’s API? Where does ZCode fit? And why does every company have a different name for essentially the same layer?

So I made myself a cheat sheet.

The mental model is simple:

App → Subscription → Harness → API Platform

I also included one increasingly important question: can the subscription be used from another harness such as OpenCode, Hermes, Pi, or OMP?

AI Ecosystem Cheat Sheet — September 2026

Provider App / UI Comparable paid plan First-party harness API platform Other harnesses?
OpenAI ChatGPT Plus — $20/mo Codex / Work OpenAI Platform Yes 1
Anthropic Claude Pro — $20/mo Claude Code Anthropic Console Limited 2
xAI Grok SuperGrok — $30/mo Grok Build xAI Console Yes 3
Google Gemini Google AI Pro — $19.99/mo Antigravity AI Studio / Vertex AI No 4
Z.ai Z.ai / ZCode GLM Coding Lite — $18/mo ZCode Agent Z.ai API Yes 5
DeepSeek DeepSeek — DeepSeek Harness (DSH) DeepSeek API API only 6
Mistral Vibe Pro — $14.99/mo Vibe Mistral Studio API credits 7
OpenCode OpenCode Go — $10/mo OpenCode Zen Yes 8

Why I Needed This

The underlying concepts aren’t that complicated. The terminology is.

One company’s Console is another company’s Studio. Code can mean a model, a CLI, or an agent. Build can mean a coding harness or an app-building mode. And a monthly AI subscription may be completely locked to the vendor’s own app—or usable across several third-party harnesses.

That last distinction matters to me because I increasingly use the harness independently of the model provider.

So this is my current cheat sheet. Given the pace at which these companies rename and reorganize their products, I expect it will need updating again soon.

  1. OpenAI: ChatGPT Plus/Pro can be used through supported third-party integrations such as OpenCode. This uses subscription authentication rather than ordinary OpenAI API credits; API billing remains separate. ↩︎

  2. Anthropic: Claude Pro includes Claude Code, but the included subscription allowance is generally limited to Anthropic’s own products. Some supported third-party harnesses can authenticate with a Claude account and use separately purchased Usage Credits, which are billed on a consumption basis at standard API rates instead of being deducted from the Pro subscription allowance. ↩︎

  3. xAI: xAI supports using a SuperGrok subscription in supported third-party tools such as OpenCode through OAuth, without requiring separate xAI API billing for that usage. ↩︎

  4. Google: Google AI Pro consumer usage is primarily tied to Google’s own tooling. Third-party harnesses generally use separately billed Gemini API or Vertex AI credentials. ↩︎

  5. Z.ai: The GLM Coding Plan is explicitly designed to work with multiple agent tools and harnesses, including OpenCode and other compatible coding agents. ↩︎

  6. DeepSeek: There is no comparable paid consumer subscription to reuse. Third-party harnesses normally connect through the separately billed DeepSeek API. ↩︎

  7. Mistral: Vibe Pro includes API credits, making the plan indirectly portable to compatible third-party harnesses through the Mistral API. ↩︎

  8. OpenCode: OpenCode Go provides an API key that can be used with OpenCode or other compatible agents. Zen is OpenCode’s separate PAYG model/API gateway. ↩︎