[FEATURE]: Codex plugin improvement to remove release lag of available models

Feature hasn't been suggested before.

I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Problem

OpenCode currently relies on a hardcoded Codex model allowlist.

This means every time OpenAI releases a new Codex-compatible model, users have to wait for an OpenCode release before they can use it, even when the model is already live upstream. For instance, GPT5.4-Mini is still not available for OpenCode users unless they use a dev build.

Why this is a problem

unnecessary release lag
users cannot access newly released Codex models immediately
repeated maintenance burden for contributors and maintainers
the app becomes stale whenever OpenAI ships model updates faster than OpenCode ships releases

Suggested resolution

I think there are two good options:

allow users to explicitly add OAuth-valid Codex models within opencode.json configuration file. For example: "codex": { "additionalAllowedModels": [ "gpt5.4-mini", "gpt5.5" ] },
extend the models.dev schema with a flag indicating whether a model is valid for OAuth auth flows, so OpenCode can rely on metadata instead of a hardcoded local list

Example

A new OpenAI model can already exist in models.dev, but OpenCode will still hide/block it for Codex OAuth until the hardcoded allowlist is updated and a new release is published.

Expected outcome

New OAuth-valid Codex models should not require a new OpenCode release just to become selectable.

This issue might be a duplicate of existing issues. Please check:

OAuth filtering blocks user-configured OpenAI model aliases #13401: OAuth filtering blocks user-configured OpenAI model aliases — same root cause (hardcoded Codex OAuth allowlist preventing users from selecting valid models), with a similar proposed fix of merging user-configured model IDs into the allowlist.
[FEATURE]: Expand model picker options after OAuth subscription #10560: Expand model picker options after OAuth subscription — related request to surface more models available via OAuth/Codex.

If your request is distinct from those, feel free to clarify the difference so maintainers can track them separately.

Proposal for option 1:

config.ts

Add new optional section to schema:

      codex: z
        .object({
          additionalAllowedModels: z
            .array(z.string())
            .optional()
            .describe("Additional model IDs to allow when using Codex OAuth authentication"),
        })
        .optional()
        .describe("Codex-specific configuration")

codex.ts

Import config:

import { Config } from "@/config/config"

Merge in any additional models from user config:

        const config = await Config.get()
        if (config.codex?.additionalAllowedModels) {
          for (const model of config.codex. additionalAllowedModels) {
            allowedModels.add(model)
          }
        }

To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.

Navigation Menu

Repository navigation

[FEATURE]: Codex plugin improvement to remove release lag of available models #18566

Feature hasn't been suggested before.

Describe the enhancement you want to request

Problem

Why this is a problem

Suggested resolution

Example

Expected outcome

Proposal for option 1:

config.ts

codex.ts

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

[FEATURE]: Codex plugin improvement to remove release lag of available models #18566

Description

Feature hasn't been suggested before.

Describe the enhancement you want to request

Problem

Why this is a problem

Suggested resolution

Example

Expected outcome

Activity

github-actions commented on Mar 21, 2026

wilkie1990 commented on Mar 21, 2026

Proposal for option 1:

config.ts

codex.ts

github-actions commented on Jul 4, 2026

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions