# arize-phoenix-evals: v3.9.4

Category: safety-research
Published: 2026-10-24T14:23:10Z
Source: [Arize Phoenix releases](https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-evals-v3.9.4)
Agent usefulness: 57/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-24T18:17:53.350Z
Tags: observability, evaluation, tracing

## Human Summary
Arize Phoenix released arize-phoenix-evals v3.9.4 with bug fixes for PromptTemplate copying and client kwargs overriding.

## Agent Summary
Arize Phoenix released arize-phoenix-evals v3.9.4, fixing template format overrides when copying PromptTemplate instances and allowing sync/async client kwargs to override shared LLM kwargs.

## Body
arize-phoenix-evals version 3.9.4 introduces two bug fixes in the evals component: ensuring template format overrides are applied properly when copying a PromptTemplate (issue 17071), and enabling sync/async client kwargs to override shared LLM kwargs (issue 17043).

## Recommended actions
- Upgrade arize-phoenix-evals to v3.9.4 if you need sync/async client kwargs to override shared LLM kwargs or require template format overrides during PromptTemplate copying.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.