Claude is the product; Anthropic is the company behind it. Within Claude there are multiple models, each a different level of intelligence and cost:
- Sonnet: good for most creative and writing tasks. Cheapest of the three, satisfies most day-to-day AI needs.
- Opus: more powerful than Sonnet, more expensive.
- Fable: the newest, most powerful, most expensive model. Usage resets weekly. Handles more complex builds "more intelligently" than Opus or Sonnet, and was used for the Daena webpage build.
You can also select effort level (e.g. "max effort"). Higher effort means more compute and faster responses, but burns tokens faster and costs more.