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AI station
OpenAI
Models that take your text and give you text back — the engine behind most AI features.
1. Learn it
- You send a prompt plus context; you get back words. That's the whole shape of it.
- Different models trade speed for depth; start cheap and fast, move up if the answers are thin.
- Structured output lets you ask for a fixed shape (JSON) so your app can use it, not just show it.
- You pay per token, which is roughly per word in and out.
Cost: Pay per use. Cents for testing, real money at scale.
2. Practice it
Simulated — nothing real happensSame question, two contexts
Write one question twice: once bare, once with the background the model needs. Predict how the answers differ.
3. Connect it
Real — your own account- 1Create an API key in the OpenAI dashboard.
- 2Put it in your app's secrets — never in the code, never in the browser.
- 3Start with the cheapest model that works; measure before upgrading.
MessyDev never signs you up, spends your money, or touches your accounts. You do that part.
4. Use it
Anything your app has to 'understand': summaries, replies, extraction, classification.
Honest alternatives
There is no single correct stack. Any of these would be a reasonable choice instead.
- Anthropic
- Gemini
- An AI gateway that fronts all of them