Technical Trigger
The cache_control field has been added to the Claude API, allowing developers to enable prompt caching. This field can be used to specify the type of caching, either ephemeral or persistent, and the time-to-live (TTL) for the cache.
Developer / Implementation Hook
Developers can implement prompt caching by adding the cache_control field to their API requests. For example, to enable automatic caching with a 5-minute TTL, they can use the following code: client = anthropic.Anthropic(); response = client.messages.create(model='claude-opus-4-7', max_tokens=1024, cache_control={'type': 'ephemeral'}, ...). Alternatively, they can use explicit cache breakpoints by placing the cache_control field directly on individual content blocks.
The Structural Shift
The introduction of prompt caching represents a shift from processing entire prompts to resuming from cached prefixes, reducing processing time and costs.
Early Warning — Act Before Mainstream
To take advantage of prompt caching, developers can:
* Add the cache_control field to their API requests to enable automatic caching
* Use explicit cache breakpoints to fine-grain control over what gets cached
* Optimize their prompts to take advantage of the caching mechanism, such as by using consistent elements and repetitive tasks