# Changelog 2024 12 16

**Opik Dashboard**:

- The Opik playground is now in public preview

:::frame
<img src="../img/apps/opik-documentation/documentation/fern/img/changelog/2024-12-16/playground.png" alt="">
:::

- You can now view the prompt diff when updating a prompt from the UI
- Errors in traces and spans are now displayed in the UI
- Display agent graphs in the traces sidebar
- Released a new plugin for the [Kong AI Gateway](https://www.comet.com/production/gateway-guardrails/gateway)

**SDK**:

- Added support for serializing Pydantic models passed to decorated functions
- Implemented `get_experiment_by_id` and `get_experiment_by_name` methods
- Scoring metrics are now logged to the traces when using the `evaluate` method
- New integration with [aisuite](/guides/python-aisuite)
- New integration with [Haystack](/guides/python-haystack)

## Related pages

- [Changelog 2026 09 21](./getting-started-changelog-2026-09-21.md)
- [Changelog 2026 09 14](./getting-started-changelog-2026-09-14.md)
- [Changelog 2026 09 07](./getting-started-changelog-2026-09-07.md)
- [Changelog 2026 08 31](./getting-started-changelog-2026-08-31.md)
- [Changelog 2026 08 24](./getting-started-changelog-2026-08-24.md)
- [Changelog 2026 08 17](./getting-started-changelog-2026-08-17.md)
- [Changelog 2026 08 10](./getting-started-changelog-2026-08-10.md)
- [Changelog 2026 07 20](./getting-started-changelog-2026-07-20.md)
- [Changelog 2026 07 13](./getting-started-changelog-2026-07-13.md)
- [Changelog 2026 07 06](./getting-started-changelog-2026-07-06.md)

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