phoenix

varize-phoenix-v18.0.0 scope: arize-phoenix Breaking

This release includes 1 breaking change for platform teams planning a safe upgrade.

Published 12d Tracing

View tool

✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

agents ai-monitoring ai-observability aiengineering anthropic datasets

+10 more

evals langchain llamaindex llm-eval llm-evaluation llmops llms openai prompt-engineering smolagents

Affected surfaces

auth

ReleasePort's take

Moderate signal

editorial:auto 12d

The Sessions API now applies interval‑overlap semantics to time‑range filters.

Why it matters: Requires migration of existing session queries; affects deployments using the sessions API immediately upon upgrade to arize-phoenix-v18.0.0.

Summary

AI summary

Sessions now use interval‑overlap semantics for time‑range filters, requiring migration.

Changes in this release

Type	Severity	Summary	CVE
Breaking	High	Changes session time-range filters to use interval-overlap semantics. Changes session time-range filters to use interval-overlap semantics. Source: llm_adapter@2026-07-14 Confidence: low	—

Full changelog

18.0.0 (2026-07-14)

⚠ BREAKING CHANGES

MIGRATION.md

sessions: use interval-overlap semantics for session time-range filters (#14023)

Features

sessions: use interval-overlap semantics for session time-range filters (#14023) (cd17357)

Breaking Changes

Sessions: session time‑range filters changed to use interval‑overlap semantics

View diff on GitHub

Weekly OSS security release digest.

The CVE patches and breaking changes that affected production tools this week. One email, every Sunday.

No spam, unsubscribe anytime.

Share this release

Share on X Share on Bluesky

Track phoenix

Get notified when new releases ship.

About phoenix

AI Observability & Evaluation

All releases →

Related context

Related tools

Earlier breaking changes

varize-phoenix-v19.0.0 GraphQL createUserApiKey and createSystemApiKey reject API-key callers.
varize-phoenix-v17.0.0 Adds system settings for admin-managed assistant enablement and trace recording policy
varize-phoenix-v16.0.0 Sandboxing and Code Evaluators introduce breaking changes in Phoenix v16.0.0.
varize-phoenix-v15.7.0 Removes v1 /chat route and associated code