Codex

Codex supports custom model providers. Add evolved.to once in its config file and every GPT model on your key is available.

Configure#

1. Export your key

   export EVOLVED_API_KEY="your_key_here"

2. Add the provider

   Create or edit ~/.codex/config.toml. Codex reads the key from the variable named in env_key.

   # ~/.codex/config.toml
   model = "gpt-5"
   model_provider = "evolved"
   
   [model_providers.evolved]
   name = "evolved.to"
   base_url = "https://api.evolved.to/v1"
   env_key = "EVOLVED_API_KEY"
   wire_api = "responses"

3. Run Codex

   codex

Choose a model#

Change the default with model in the config, or per session with -m:

codex -m gpt-astra-6

See every ID on the ChatGPT models page.