October of 2025 was a crowded month for shipping new features in Arize AX, with updates to make AI agent engineering easier. From a new timeline tab for traces to data fabric, there is a lot to catch up on and try out.
Tags
Tags are a lightweight way for you to organize and label your entities across the Arize AX platform. You can use tags to:
- Describe source (
from-prod,EHR-record) - Encode purpose (
ab-test,regression-test) - Indicate readiness (
golden,deprecated) - Group by config (
threshold-0.85,cohort_5)
Tags live at the Space level, under Space Settings. They can be reused across entities that belong to that space (Datasets, Experiments, and more).
Data Fabric
We’re excited to introduce Data Fabric, a new capability that automatically synchronizes production trace data, evaluations, and annotations from Arize AX into your cloud data warehouse every 60 minutes in Iceberg format—giving you an always-current, query-ready source of truth.
Monitors Updates
Automatic Threshold Ranges for Monitors
You can now set upper and lower bounds using our new auto threshold options!
Arize can automatically determine the right threshold for your alerts based on your historical data. This is ideal for most users who want to start monitoring without manually tuning thresholds.
API-Driven Monitors
Arize AX now has API-triggered monitors: a monitor type that only evaluates when triggered via API call, instead of on a fixed schedule. Ideal for teams running evaluations after events like batch ingestions, model retraining, or CI/CD workflows.
Tracing Updates
New Timeline Tab for Traces
You can now see a timeline view when you click into a trace! The new timeline view is right next to the Trace Tree and Agent Graph tabs, and it shows the execution flow and duration of each span.
Add Auth Failures to Tracing
This release adds tracing for authentication failures, enabling better visibility and debugging of auth-related issues across systems.
Total Traces on Stats Bar
Your projects now display the total number of traces directly in the Stats Bar at the top for quicker visibility into overall activity.
Support for Tool Call IDs in OpenInference Messages
This update introduces full support for tool_call_id and tool_call.id in OpenInference message semantics. These identifiers are now stored alongside input and output messages. Tool call IDs now appear in the trace slideover’s input/output and attributes tabs.
Add Data Region to Login Page
Arize AX now has a data region selector to the login page, allowing users to choose their preferred data region during sign-in. This helps ensure compliance and improved performance based on regional data needs.
Expanded LLM Support
Arize AX now supports Claude models on Bedrock and Vertex, Titan Text Premiere, Amazon Nova Premiere, Gemini 2.5 Flash/Pro, and new GPT OSS and DeepSeek models —offering broader coverage across top providers.
We also added Arize AX support for GPT open-source models available on Bedrock — try them out now in the Prompt Playground!
Datasets & Experiments
Sort Datasets and Experiment Listing Table
You can now sort your datasets and experiments by name, number of experiments, creation date, and more!
Autocomplete for Annotations on Datasets
You can now autocomplete annotation variables when editing eval templates in the playground or directly from dataset slideovers. This makes building and managing evals faster and more intuitive.