Arize AX (September 2026 release)
Arize AX made sessions a first-class object and expanded Agent-as-a-Judge evaluation to every pricing tier.
Overview
Arize's August 6-September 18, 2026 AX release made conversation sessions a first-class, actionable unit (annotate, queue for review, evaluate at session level) and expanded Agent-as-a-Judge -- which inspects a production trace, finds relevant spans, and labels issues -- from Enterprise-only to every plan. The release also added vision evaluations (LLM judges can reference image columns across traces, datasets, and Playground), a new client.traces.list() Python SDK method, faster dataset population from traces, and support for new models including Claude Fable 5.1, OpenAI's GPT-6/gpt-6-astra, and Gemini 3.7 Flash.
This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.
Key features
- Sessions as first-class objects (annotate, queue, evaluate at session level)
- Agent-as-a-Judge on every plan (previously Enterprise-only)
- Vision evaluations across traces, datasets, and Playground
- New client.traces.list() SDK method
- New model support: Claude Fable 5.1, GPT-6/gpt-6-astra, Gemini 3.7 Flash
Use cases
- Evaluating multi-turn agent conversations as a whole
- Automated agent trace grading without human review
- Multimodal (image/audio) agent evaluation
Pricing
unknown -- Agent-as-a-Judge availability expanded to all tiers, but tier pricing not disclosed.
Pricing reflects the source record and may change. Confirm current terms with the provider.
Dates and sources
- Released
- 6 Aug 2026
- Record updated
- 23 Sept 2026
- Record last checked
- 23 Sept 2026