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OpenAI covers three parts of the pipeline: the language model that decides what the agent says, the voice that speaks it, and the transcription that turns the caller’s speech into text. One connection drives all three. You do not add OpenAI once per service.

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What you need

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Getting your API key

  1. Sign in at platform.openai.com/api-keys.
  2. Create a new secret key.
  3. Copy it immediately — OpenAI shows the key once and never again.
Keys begin with sk-.
OpenAI keys belong to a project, with its own billing, rate limits and usage tracking. Create the key in the project you want the usage charged to, and make sure that project has billing set up — a key with no payment method behind it authenticates but fails on the first call.
For anything running in production, use a key from a service account rather than one created under a personal login. Personal keys are revoked when their owner loses access to the project, which stops calls with nothing on the SentiVue Talk side to explain it.

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Adding the connection

  1. Go to Connections and choose OpenAI.
  2. Paste the API key.
  3. Save.
SentiVue Talk validates the key with OpenAI as you save, so a bad or expired key is caught immediately rather than on a live call.

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What you can select afterwards

Choose your models on Model Configurations. Language model — pick from the dropdown, or type a name in for any model your account can reach. The mini and nano variants are faster, and a slow reply is heard as a pause. See OpenAI’s model list. Voice — pick from the dropdown. OpenAI’s text-to-speech page has samples. Language — set it to match your callers. See OpenAI’s speech-to-text guide.

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Using OpenAI for only some services

A connection can be limited to specific services. If you want OpenAI for the language model but a different provider for the voice, turn the voice service off on the OpenAI connection.

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Custom hosts

If you reach OpenAI through a proxy or gateway rather than api.openai.com, you can set a base URL per service on the connection. Each service can point somewhere different.

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Realtime is a separate connection

OpenAI’s speech-to-speech model is a separate provider in SentiVue Talk, with its own connection. See OpenAI Realtime.

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Troubleshooting

Confirm you copied the whole key including the sk- prefix, that it has not been revoked, and that the project it belongs to has billing enabled.
Rate limits are per project, not per organization. Check the limits on the project the key belongs to rather than your account total.
If it was created under someone’s personal login, check whether that person still has access to the project. Personal keys are revoked along with their owner’s account. Replace it with a service-account key.