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Can Codex use a custom API provider in Antigravity?
Codex configuration allows custom model providers, including an API endpoint and a key supplied through an environment variable. The Codex CLI and IDE extension are described as sharing configuration, but that does not guarantee every extension build or third party API will work.
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Key takeaways
- Codex configuration allows custom model providers, including an API endpoint and a key supplied through an environment variable.
- The Codex CLI and IDE extension are described as sharing configuration, but that does not guarantee every extension build or third party API will work.
- A GitHub issue reports a custom provider problem in an IDE extension while the CLI worked in that user's setup; it does not establish whether the issue affects current versions.
- The available sources do not verify the specific Codex extension, version, or API used in Antigravity.
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Codex can be configured to use custom model providers. Its configuration documentation describes adding a provider with its own API base URL, and provider credentials can be loaded from an environment variable. 6
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That answers what Codex’s configuration supports—but not whether a particular Codex extension works inside Antigravity. A third-party setup guide says the Codex CLI and IDE extension share the same config.toml configuration layers. 8 Shared configuration, however, is not proof that every extension version or third-party API is compatible.
There is also a reported case in which a custom provider worked from the Codex CLI but did not work as expected in the VS Code extension. That report describes one user’s setup; it does not show whether the problem remains in current versions, or whether it applies to Antigravity. 13
Bottom line: custom providers are supported by Codex’s configuration mechanism, but the available evidence cannot confirm that the specific extension build you have installed in Antigravity will work with your chosen API. The sources do not identify that build or API, so they cannot settle the compatibility question.
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People also ask
What is the short answer to "Can Codex use a custom API provider in Antigravity?"?
Codex configuration allows custom model providers, including an API endpoint and a key supplied through an environment variable.
What are the key points to validate first?
Codex configuration allows custom model providers, including an API endpoint and a key supplied through an environment variable. The Codex CLI and IDE extension are described as sharing configuration, but that does not guarantee every extension build or third party API will work.
What should I do next in practice?
A GitHub issue reports a custom provider problem in an IDE extension while the CLI worked in that user's setup; it does not establish whether the issue affects current versions.