# Changelog ### 1.03- 2026-05-07 * New output `accuracy_indicator` and `definitive_beng2` * The `accuracy_indicator` measures the reliability of the estimated current energy label in ±1 label difference, which is converted to a 1-7 rating for simplicity at [Accuracy indicator](/english/sustainability/nta-8800-energylabel-v2-api/apartments/accuracy-indicator.md) * Updated new ML model for cases where the definitive energy label is not known. ### 1.02- 2026-04-14 * New input `number_of_solar_panels` translated to default values explained at [Measures](/english/sustainability/sustainability-api-v2-apartments/measures.md) ### 1.01- 2026-03-26 * [NTA 8800 Energylabel v2 API](https://app.gitbook.com/o/pLuAKZrbll04y6968KwP/s/-Lw4gk5ARKsgVHFCdPZw/~/edit/~/changes/1423/sustainability/nta-8800-energylabel-v2-api) logic used internally as input. A separate call to [NTA 8800 Energylabel v2 API](https://app.gitbook.com/o/pLuAKZrbll04y6968KwP/s/-Lw4gk5ARKsgVHFCdPZw/~/edit/~/changes/1423/sustainability/nta-8800-energylabel-v2-api) is no longer required to received the current situation. * New input `custom_measure_costs` explained at [Cost indicators](/english/sustainability/sustainability-api-v2-apartments/cost-indicators.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.altum.ai/english/sustainability/sustainability-api-v2-apartments/changelog.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.