# arize-phoenix: v20.26.0

Category: safety-research
Published: 2026-10-23T18:11:17Z
Source: [Arize Phoenix releases](https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.26.0)
Agent usefulness: 72/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-23T18:17:51.316Z
Tags: observability, evaluation, tracing

## Human Summary
Arize Phoenix v20.26.0 introduces OpenTelemetry service.version attribution, Claude Console linking in factory comments, triage improvements for factory candidates, and dependency updates.

## Agent Summary
Arize Phoenix v20.26.0 adds service.version to server OpenTelemetry resources, links session IDs in factory comments to Claude Console, and updates the arize-phoenix-evals dependency to 3.9.3.

## Body
Arize Phoenix released version 20.26.0 with several updates spanning core server observability and developer workflows. Key changes include adding service.version to the server's OpenTelemetry resource attributes, linking session IDs in factory comments directly to the Claude Console, and introducing factory candidate nomination in triage with dispatching for trusted candidates. Additionally, it updates the arize-phoenix-evals dependency to version 3.9.3 and adds documentation for PR auto-merge and Pipecat tracing.

## Recommended actions
- Upgrade to arize-phoenix v20.26.0 if leveraging new OpenTelemetry service.version attributes or factory workflow integrations.
- Verify compatibility with the updated arize-phoenix-evals version 3.9.3.

## 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.