[Bug] Models from Codex (openai) are not accessible when Copilot is added

[mohammad-malik]

Due to how model names are just gpt-5.1/5.2 etc across both, only Copilot provider is available for them.

curl -s http://localhost:6616/v1/models \
    -H "Authorization: Bearer $OPENAI_API_KEY" \
    | jq '.data[] | select(.id | contains("gpt-5.2"))'
{
  "created": 1732752000,
  "id": "gpt-5.2",
  "object": "model",
  "owned_by": "github-copilot"
}

Note the lack of a gpt-5.2 from openai.

curl -s http://localhost:6616/v1/models \
    -H "Authorization: Bearer $OPENAI_API_KEY" \
    | jq '.data[] | select(.id | contains("gpt-5.1"))'
{
  "created": 1732752000,
  "id": "gpt-5.1-codex-mini",
  "object": "model",
  "owned_by": "github-copilot"
}
{
  "created": 1732752000,
  "id": "gpt-5.1-codex",
  "object": "model",
  "owned_by": "github-copilot"
}
{
  "created": 1732752000,
  "id": "gpt-5.1",
  "object": "model",
  "owned_by": "github-copilot"
}
{
  "created": 1763424000,
  "id": "gpt-5.1-codex-max",
  "object": "model",
  "owned_by": "openai"
}

Here as well, gpt-5.1/5.1-codex/5.1-codex-mini from openai not visible despite 5.1 codex max being available.

A way to fix this could be to append a prefix, as done with Antigravity. Something like ghc-gpt-5.1.

[mohammad-malik]

I can confirm this is a conflict issue as when I excluded gpt-5.2 through /management, it now does show gpt-5.2 by openai.

{
  "created": 1765440000,
  "id": "gpt-5.2",
  "object": "model",
  "owned_by": "openai"
}