OpenAI

OpenAI uses API-key auth. For shared concepts such as credential storage and model selection, see authentication and models.

At a glance

Setting	Value
Provider	openai
Auth	api-key
Environment override	OPENAI_API_KEY
API base	https://api.openai.com/v1
Model list	Refreshable after authentication

Sign in

/login openai

/login openai opens a masked API-key entry box in the interactive TUI. Credentials are stored in the configured credential store, not in config or transcripts.

Sign out

/logout openai

/logout openai deletes the stored OpenAI API key. If an environment override is still present, the provider stays available.

Environment override

OPENAI_API_KEY=...

Environment variables are CI/development escape hatches and override stored credentials. For normal interactive setup, prefer /login.

Models

OpenAI can refresh its provider model list through Refresh model lists in /config. Switch to an OpenAI model with:

/model openai/gpt-5.6-sol

For a non-interactive run, pass the matching provider, auth mode, and model. These flags also update the persistent default:

rho --provider openai --auth api-key --model gpt-5.6-sol run "hello"

Provide OPENAI_API_KEY in the automation environment or log in once through the TUI so Rho can read the stored key.

Notes

• OpenAI API-key requests use the Chat Completions API and do not currently send a reasoning configuration.
• Pricing-sensitive models such as openai/gpt-5.6-sol use safer effective context windows below their advertised maximums to avoid long-context pricing thresholds.