> ## Documentation Index
> Fetch the complete documentation index at: https://prod-mint.classiq.io/llms.txt
> Use this file to discover all available pages before exploring further.

# 0.63.0

Released on 2024-12-23.

## Upgrade Instructions

* [Python SDK](/getting-started/registration_installations#platform-version-updates)
* The IDE upgrades automatically.

## Enhancements

1. [Generative functions](https:///qmod-reference/language-reference/generative-functions/)
   have undergone a round of significant improvements.
   Check out our [DQI notebook](/explore/algorithms/search_and_optimization/dqi/dqi_max_xorsat/)
   to see how generative functions are used to implement advanced quantum algorithms.
2. A new filed `optimization_level` has been added the `Preferences` of the synthesis.
   This field determines the trade-off between synthesis speed and the quality of the results,
   In terms of the optimization parameter and the constraints. For more information,
   see [here](/user-guide/synthesis/preferences#optimization-level).
3. State vector filtering is available. This is an important step for simulating
   large circuits with a state vector simulator. For more information, see [this page](/user-guide/execution/state-vector-filtering)

## Bug Fixes

1. Fix usage of overlapping quantum array slices (e.g., `qbv[1:3]` and `qbv[2]`)
   in bodies of lambda expressions and control statements.