When Anthropic deprecates an older Claude model, what typically happens to API calls using that model ID?
Select an answer to reveal the explanation.
Short Explanation
Deprecation gives you a grace period, then the old model ID stops working. Track Anthropic's announcements and test migration before the deadline.
Full Explanation
When Anthropic deprecates a model, they typically provide advance notice and a migration timeline. After the sunset date, API calls using the deprecated model ID may return errors or be redirected to a newer model, which may have different behavior, so developers must migrate. Developers should monitor Anthropic's announcements, test their applications with the replacement model, and migrate before the deprecation deadline. The claim that deprecated models continue working forever with the same model is wrong because deprecation ends support for that model ID. The claim that deprecated models become free to use with no rate limits is wrong because no such free tier exists for deprecated models. The claim that Anthropic automatically upgrades all API calls to the newest model without notification is wrong because silent upgrades would cause unexpected behavior changes and don't match Anthropic's practice.