WTH there is not a conversation integration that let you use any OpenAI-compatible API

i guess this might not be possible for every type of HASS installation but a simple workaround is to set the OPENAI_BASE_URL environment variable.

for example on HASS Core started via systemd, you can create a drop-in config with systemctl edit home-assistant and add:

[Service]
Environment="OPENAI_BASE_URL=https://openrouter.ai/api/v1"
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