> ## Documentation Index
> Fetch the complete documentation index at: https://arize-ax.mintlify.site/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# April 2025
> Our April 2025 releases
## Major design refresh in Arize AX
April 28, 2025
We've refreshed Arize AX with polished fonts, spacing, color, and iconography throughout the whole platform.
## Custom code evaluators
April 26, 2025
You can now run your own custom python code evaluators in Arize against your data in a secure environment. Use background tasks to run any custom code, such as URL validations, or keyword match. [Learn more](/docs/ax/evaluate/evaluators/code-evaluations)
## Security audit logs for enterprise customers
April 25, 2025
Improve your compliance and policy adherence. You can now use audit logs to monitor data access in Arize. Note: This feature is completely opt-in and this tracking is not enabled unless a customer explicitly asks for it. [Learn more](/docs/ax/security-and-settings/compliance/arize-audit-log)
## Larger dataset runs in prompt playground
April 24, 2025
We've increased the row limit for datasets in the playground, so you can run prompts in parallel on up to 100 examples.
## Evaluations on experiments
April 24, 2025
You can now create and run evals on your experiments from the UI. Compare performance across different prompt templates, models, or configurations without code. [Learn more →](/docs/ax/evaluate/run-evals-on-experiments)
## Cancel running background tasks
April 24, 2025
When running evaluations using background tasks, you can now cancel them mid-flight while observing task logs. [Learn more →](/docs/ax/evaluate/run-evals-on-traces)
## Improved UI for functions in prompt playground
April 21, 2025
We've made it easier to view, test, and validate your tool calls in prompt playground. [Learn more →](/docs/ax/concepts/prompts/prompt-playground)
## Compare prompts side by side
April 15, 2025
Compare the outputs of a new prompt and the original prompt side-by-side. Tweak model parameters and compare results across your datasets.
[Learn more →](/docs/ax/concepts/prompts/prompt-playground)
## Image segmentation support for CV models
April 14, 2025
We now support logging image segmentation to Arize. Log your segmentation coordinates and compare your predictions vs. your actuals.
[Learn more →](/docs/ax/machine-learning/computer-vision/use-cases-cv/image-segmentation)
## New time selector on your traces
April 11, 2025
We’ve made it *way* easier to drill into specific time ranges, with quick presets like "last 15 minutes" and custom shorthand for specific dates and times, such as `10d` ,`4/1 - 4/6`, `4/1 3:00am` . [Learn more →](/docs/ax/observe/tracing/view-and-manage-traces)
## Prompt hub python SDK
April 7, 2025
Access and manage your prompts in code with support for OpenAI and VertexAI. [Learn more](/docs/api-clients/python/version-7/prompt-hub-api)
```bash theme={null}
pip install "arize[PromptHub]"
```
## View task run history and errors
April 4, 2025
Get full visbility into your evaluation task runs, including when it ran, what triggered it, and if there were errors. [Learn more →](/docs/ax/evaluate/run-evals-on-traces)
## Run evals and tasks over a date range
April 2, 2025
[April 2, 2025](/docs/ax/release-notes/history/2025/04-2025)
Easily run your online evaluation tasks over historical data.
