InferKit

InferKit is a text generation service that does one thing well: it continues whatever text you feed it. You type or paste a prompt of at least 100 characters into the web interface (or send it to the API), and its neural model generates the continuation, which makes it useful for drafting stories, poetry, product descriptions, and marketing copy, or as a programmable autocomplete inside other applications. The model reads up to 3,000 characters of context at a time, so it holds a scene or a product brief in view while it writes.

The pricing is character-based rather than feature-gated. A free trial allows up to 10,000 characters per week without API access, Basic costs $20 per month for 600,000 characters with the API included and extra blocks at $0.28 per 10,000 characters, and Premium at $60 per month raises the quota to 2.5 million characters with cheaper overage at $0.12 per 10,000 plus priority support. It is a veteran of the early GPT-era tooling wave, so it lacks the modern chat UX of newer products, but for developers who want a simple hosted text-completion endpoint it remains a straightforward option.

1. Register for a free account at inferkit.com.
2. Use the web interface to paste a prompt and generate continuations (up to 10,000 characters per week on trial).
3. Subscribe to Basic or Premium to unlock API access.
4. Generate an API key and integrate the completion endpoint into your app.