# August 20: Support for medical entities, Anthropic prompt caching, bug fixes

### New Features

* :bulb: Graphlit now supports the extraction of medical-related entities: MedicalStudy, MedicalCondition, MedicalGuideline, MedicalDrug, MedicalDrugClass, MedicalIndication, MedicalContraindication, MedicalTest, MedicalDevice, MedicalTherapy, and MedicalProcedure.
* :bulb: Graphlit now supports medical-related entities in GraphRAG, and via API for queries and mutations.
* Added support for [Anthropic prompt caching](https://docs.anthropic.com/en/docs/build-with-claude/prompt-caching#how-prompt-caching-works). When using Anthropic Sonnet 3.5 or Haiku 3, Anthropic will now cache the entity extraction and LLM document preparation system prompts, which saves on token cost and increases performance.

### Bugs Fixed

* GPLA-3104: Should default search type to VECTOR, when performing entity similarity filter.
* GPLA-3112: Empty PDF fails entity extraction.


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