Overview
Loom uses OpenAI’s newer Responses API for current GPT and o-series models, and the classic Chat Completions API for older ones. It picks the right one for you.
The API is separate from ChatGPT. A ChatGPT Plus or Pro plan does not include API access, and Loom cannot sign in with one.
Get a key
- 1Go to platform.openai.com and sign in or create an account. This is the developer platform, not chatgpt.com.
- 2Open Billing and add credit. API use is prepaid, and most models only work once there is a balance.
- 3Open API keys and choose Create new secret key. Keep Owned by on a project unless you have a reason to change it.
- 4Copy the key. OpenAI shows it once; after that it is masked.
Cost. Prepaid, per token. Turn on a usage limit in the dashboard if you want a ceiling.
Add it to Loom
- 1Open Loom, then Providers in the menu, and choose Add provider.
- 2Pick OpenAI (the search box finds it).
- 3Fill in the fields in the table below.
- 4Choose Connect. Loom checks the key and says how many models it found. If it cannot check, it says so, and you can Save anyway and try a message.
- 5Open the model chip below the message box and pick a model.
| Field in Loom | What to put | Needed |
|---|---|---|
| API key | Paste the key you copied. Create one at platform.openai.com → API keys. | Yes |
| Endpoint | https://api.openai.com/v1 | Pre-filled |
| Name | Anything you like. It is shown in the model picker | Optional |
At a glance
| Appears in Loom as | OpenAI |
| Sign-in | Your key, sent as Authorization: Bearer |
| Models | Loom fetches the list from your account |
| Tools (connectors, search) | Yes |
| Photos | Yes |
| PDFs | Yes |
If something goes wrong
| What you see | What to do |
|---|---|
| 401, “incorrect API key” | Paste the key again with no spaces, or create a new one. |
| 429, “you exceeded your current quota” | The balance is empty. Add credit under Billing. |
| A model is missing from the list | Your project may not have access to it. Pick another, or check the project’s model access in the dashboard. |