> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 2026

<CardGroup>
  <Card href="/docs/phoenix/release-notes/08-2026/08-12-2026-session-filters-rest-api-and-endpoint-config" arrow="true" title="08.12.2026" icon="calendar" description="A full expression language for the sessions table — session intrinsics, per-session aggregates, and comprehensions over spans, traces, annotations, and cost details — plus plain-English AI query; REST endpoints for dataset splits, experiment tags, and moving traces between projects; prompt description and metadata updates from both client SDKs; PHOENIX_ENDPOINT as the canonical API base URL across every SDK, the px CLI, and the MCP server; OAuth2 workload identity via a platform-minted client assertion; a trace_annotations keyword in the span filter DSL; a dedicated SQLite read pool and Unicode-correct case-insensitive matching; and a breaking change moving the Python client's Google prompt helpers to google-genai (arize-phoenix 19.18.0–20.1.0; arize-phoenix-client 3.0.0; @arizeai/phoenix-client 7.4.0; @arizeai/phoenix-otel 2.2.0; @arizeai/phoenix-cli 1.15.0)" />

  <Card href="/docs/phoenix/release-notes/08-2026/08-11-2026-persistent-agent-sessions" arrow="true" title="08.11.2026" icon="calendar" description="Conversations with the Phoenix agent are persisted server-side and shared between the browser panel and the pxi terminal client — browse and restore past chats, rename them, mark one temporary, rewind or branch from any message, compact a long session into a checkpoint, and govern retention from Settings → Assistant (arize-phoenix 20.0.0; @arizeai/phoenix-cli 1.16.0; @arizeai/phoenix-client 7.5.0)" />

  <Card href="/docs/phoenix/release-notes/08-2026/08-04-2026-chat-completions-proxy-ai-query-and-annotation-charts" arrow="true" title="08.04.2026" icon="calendar" description="An OpenAI-compatible /v1/chat/completions proxy that resolves provider credentials on the server; AI Query for the span, trace, and experiment run filter fields — describe a filter in plain English using on-device Browser AI or any Phoenix-known provider; a metric chart per annotation name with the three-chart selection cap lifted and charts deferred until scrolled into view; a conversation-grounded Hallucination evaluator (labels now grounded/hallucinated); span and trace annotations in span downloads, streamed to disk; and a pinned note bar in span details (arize-phoenix 19.11.0–19.17.0; @arizeai/phoenix-evals 2.2.0; @arizeai/phoenix-cli 1.14.0)" />

  <Card href="/docs/phoenix/release-notes/07-2026/07-28-2026-experiment-charts-span-downloads-and-root-span-filters" arrow="true" title="07.28.2026" icon="calendar" description="Metric charts above the experiments table with drag-to-reorder and token sub-type breakdowns; span and trace downloads as OTLP JSON or JSONL; span-ID filtering across the REST API, TypeScript client, and px span list; a parent_span is None root-span predicate in the span filter DSL; span attributes, annotations, and notes as searchable tables; a Toxicity evaluator in both evals SDKs; the Monty local Python sandbox; Claude Opus 5 and new Gemini Flash models; and AI SDK v7 for the TypeScript client and evals packages (arize-phoenix 19.5.0–19.10.0; arize-phoenix-evals 3.3.0; @arizeai/phoenix-client 7.1.0; @arizeai/phoenix-evals 2.1.0; @arizeai/phoenix-otel 2.1.0; @arizeai/phoenix-cli 1.13.0)" />

  <Card href="/docs/phoenix/release-notes/07-2026/07-22-2026-mcp-setup-provider-filter-and-evals" arrow="true" title="07.22.2026" icon="calendar" description="One-command MCP client setup with px setup mcp and a Settings MCP tab; playground model picker scoped to provisioned providers; a new User Friction evaluator in the Python and TypeScript evals SDKs; and AI SDK v7 tracing via @arizeai/phoenix-otel (arize-phoenix 19.1.0–19.4.0; arize-phoenix-evals 3.2.0; @arizeai/phoenix-evals 1.2.0; @arizeai/phoenix-otel 2.0.0)" />

  <Card href="/docs/phoenix/release-notes/07-2026/07-17-2026-oauth2-authorization-server" arrow="true" title="07.17.2026" icon="calendar" description="Phoenix becomes its own OAuth2 authorization server: browser-based px CLI login (px auth login), a built-in Remote MCP server at /mcp (beta), REST CRUD for user and system API keys with dedicated settings tabs, and a breaking change removing API-key-authenticated GraphQL key issuance (arize-phoenix 19.0.0)" />

  <Card href="/docs/phoenix/release-notes/07-2026/07-14-2026-command-palette-sessions-and-tables" arrow="true" title="07.14.2026" icon="calendar" description="Global search command palette (⌘K); customizable, drag-to-reorder table columns; session stats panel, turn dividers, and session annotation editing; .env.phoenix credential discovery and a unified PHOENIX_PROJECT variable; GPT 5.6 family in the Playground; breaking change — session time-range filters now match on interval overlap (arize-phoenix 17.21–18.0; arize-phoenix-client 2.13.0; @arizeai/phoenix-config 0.3.0)" />

  <Card href="/docs/phoenix/release-notes/07-2026/07-07-2026-metric-charts-trace-search-and-rest-api" arrow="true" title="07.07.2026" icon="calendar" description="Metric charts pinned above the spans, traces, and sessions tables; trace tree search; dataset labels and annotation-config assignment over REST; project name filtering; baseline experiments; px annotation-config CLI; TypeScript classification-metric evaluators and logSpans; Claude Sonnet 5 in the Playground (arize-phoenix 17.15–17.20; arize-phoenix-client 2.12.0; @arizeai/phoenix-client 6.12.0; @arizeai/phoenix-evals 1.1.0)" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-30-2026-pxi-terminal-client-and-annotation-summary" arrow="true" title="06.30.2026" icon="calendar" description="Run PXI as an interactive terminal chat from the Phoenix CLI (npx @arizeai/phoenix-cli pxi, beta); review and bulk-delete annotations by name from project settings; copy trace IDs from experiment trace details (@arizeai/phoenix-cli 1.6.0; arize-phoenix 17.14.0)" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-26-2026-eval-ci-pytest-vitest-jest" arrow="true" title="06.26.2026" icon="calendar" description="Write LLM evals as pytest, Vitest, or Jest tests that record every run to Phoenix as a versioned experiment — familiar DX, full traces, metrics beyond pass/fail, and acceptance-criteria CI gates (arize-phoenix-client 2.10.0; @arizeai/phoenix-client 6.11.1 beta)" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-24-2026-annotations-labels-and-pxi-server-tools" arrow="true" title="06.24.2026" icon="calendar" description="Trace-level annotations in the trace header and project stats; label management and usage counts on the Prompts and Datasets lists; OAuth2 role-override preservation; a server-side bash tool for PXI subagents (17.9–17.11)" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-16-2026-time-range-metrics-and-sharing" arrow="true" title="06.16.2026" icon="calendar" description="Calendar time range picker with pan, zoom, and live streaming controls; shareable trace URLs; trace, session, and token detail metrics; opt-in PXI subagents (17.5–17.7)" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-11-2026-time-range-and-pxi-slash-commands" arrow="true" title="06.11.2026" icon="calendar" description="Searchable time range selector with free-form durations (25m, 2h, 3d); PXI slash commands and dataset evaluator editing" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-10-2026-pxi-agent-update" arrow="true" title="06.10.2026" icon="calendar" description="PXI skills menu, parallel subagents, playground orchestration, evaluator authoring, and dataset management; Claude Fable 5 in the playground" />

  <Card href="/docs/phoenix/release-notes/06-2026/06-02-2026-pxi-agent" arrow="true" title="06.02.2026" icon="calendar" description="Introducing PXI (beta) — the AI engineering agent built into Phoenix that investigates traces, iterates on prompts, and runs experiments on your observability data" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-27-2026-drag-to-zoom" arrow="true" title="05.27.2026" icon="calendar" description="Click-and-drag to zoom into a time window on project metric charts and the spans sparkline" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-21-2026-code-evaluators" arrow="true" title="05.21.2026" icon="calendar" description="Code Evaluators — write Python or TypeScript evaluate() functions in the Phoenix UI and run them server-side in an isolated sandbox" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-15-2026-otel-semconv-conversion" arrow="true" title="05.15.2026" icon="calendar" description="OTel GenAI semantic convention attributes auto-converted to OpenInference at ingest — full message I/O, tool calls, and token counts from OTel-native instrumentations" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-15-2026-session-feedback-and-atif" arrow="true" title="05.15.2026" icon="calendar" description="Session turn feedback toolbar (thumbs up/down, annotate); ATIF v1.7 support with embedded subagents, trajectory_id, session_id, and deterministic dispatch steps" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-13-2026-playground-thinking-controls" arrow="true" title="05.13.2026" icon="calendar" description="Playground thinking controls for Anthropic (adaptive/enabled, budget, effort) and Google (budget, level)" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-13-2026-session-and-annotations" arrow="true" title="05.13.2026" icon="calendar" description="Expandable session turn messages; note identifier upsert on notes REST endpoints; new CLI annotation bulk-delete and project-get commands" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-10-2026-playground-preferences" arrow="true" title="05.10.2026" icon="calendar" description="Save a default Playground provider and model; span metrics aside now always visible" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-08-2026-otlp-project-header" arrow="true" title="05.08.2026" icon="calendar" description="Route OTLP traces to a named project via x-project-name HTTP header" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-05-2026-provider-tools" arrow="true" title="05.05.2026" icon="calendar" description="Vendor-native tools (web search, code execution, computer use, grounding) in Playground and Prompts" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-05-2026-rest-api-updates" arrow="true" title="05.05.2026" icon="calendar" description="Filter-based annotation DELETE; token counts in trace/session REST payloads; evals runtime model detection" />

  <Card href="/docs/phoenix/release-notes/05-2026/05-01-2026-tanstack-ai-tracing" arrow="true" title="05.01.2026" icon="calendar" description="OpenInference middleware for TanStack AI — AGENT, LLM, and TOOL spans for chat() calls" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-30-2026-cli-auth-profiles" arrow="true" title="04.30.2026" icon="calendar" description="px profile commands for named auth profiles; switch Phoenix instances without re-exporting env vars" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-30-2026-annotation-enhancements" arrow="true" title="04.30.2026" icon="calendar" description="CLI session annotations and notes; TypeScript trace annotations; query annotations by identifier" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-29-2026-dataset-upsert" arrow="true" title="04.29.2026" icon="calendar" description="Breaking change: create_dataset now upserts — merges examples into existing datasets instead of failing" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-28-2026-session-notes-api" arrow="true" title="04.28.2026" icon="calendar" description="Dedicated session notes REST API; reserve the note annotation name for session note endpoint" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-24-2026-trace-notes-api" arrow="true" title="04.24.2026" icon="calendar" description="Trace notes via REST, TypeScript client, and CLI; px trace add-note command" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-22-2026-secrets-ui-and-evaluator-trace-id" arrow="true" title="04.22.2026" icon="calendar" description="Secrets settings page in Phoenix UI; trace_id parameter in experiment evaluators" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-20-2026-span-attribute-filter-cli-notes-and-opus-4-7" arrow="true" title="04.20.2026" icon="calendar" description="Span attribute filtering (Python, TypeScript, REST, CLI); px span add-note; Claude Opus 4.7 in playground" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-16-2026-azure-managed-identity-postgres" arrow="true" title="04.16.2026" icon="calendar" description="Azure managed identity authentication for PostgreSQL; arize-phoenix[azure] extra" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-14-2026-cli-annotation-commands" arrow="true" title="04.14.2026" icon="calendar" description="CLI annotation commands: px span annotate, px trace annotate, --include-annotations flag" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-13-2026-phoenix-otel-ts-1-0" arrow="true" title="04.13.2026" icon="calendar" description="@arizeai/phoenix-otel 1.0 — tracing helpers, observe decorator, context setters, and OpenInference semantic conventions" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-10-2026-shareable-url-redirects" arrow="true" title="04.10.2026" icon="calendar" description="Shareable project URLs: /redirects/projects/{name} resolves to the project page by name" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-07-2026-postgresql-read-replica" arrow="true" title="04.07.2026" icon="calendar" description="PostgreSQL read replica routing; Phoenix v14 breaking changes" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-07-2026-phoenix-v14-breaking-changes" arrow="true" title="04.07.2026" icon="calendar" description="Breaking changes: CLI restructuring, px.Client() removal, /v1/evaluations removal, evals 1.0 removal" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-03-2026-atif-trajectory-upload" arrow="true" title="04.03.2026" icon="calendar" description="Upload ATIF agent trajectories as Phoenix traces" />

  <Card href="/docs/phoenix/release-notes/04-2026/04-01-2026-get-traces-secrets-api-and-python-314" arrow="true" title="04.01.2026" icon="calendar" description="get_traces SDK method; secrets management REST API; Python 3.14 support" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-30-2026-delete-prompts-api" arrow="true" title="03.30.2026" icon="calendar" description="Delete prompts and prompt version tags via REST API" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-24-2026-prompt-version-diff-and-evals-updates" arrow="true" title="03.24.2026" icon="calendar" description="Prompt version diff view; structured eval inputs; LLM kwargs for built-in evaluators" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-22-2026-cli-and-user-api" arrow="true" title="03.22.2026" icon="calendar" description="px spans command, px self update, GET /v1/user endpoint, px auth status enrichment" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-13-2026-rest-api-improvements" arrow="true" title="03.18.2026" icon="calendar" description="Span filters by name, kind, and status code; list traces by project" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-11-2026-session-turns-api" arrow="true" title="03.11.2026" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-08-2026-new-playground-providers-and-project-settings" arrow="true" title="03.08.2026" icon="calendar" description="New playground providers and editable project settings" />

  <Card href="/docs/phoenix/release-notes/03-2026/03-05-2026-sdk-session-retrieval" arrow="true" title="03.05.2026" icon="calendar" description="SDK session retrieval for Python and TypeScript" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-27-2026-cli-sessions-and-rest-api" arrow="true" title="02.27.2026" icon="calendar" description="Sessions API and CLI support" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-14-2026-phoenix-13-0" arrow="true" title="02.14.2026" icon="calendar" description="Phoenix 13.0" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-12-2026-openai-responses-api-support" arrow="true" title="02.12.2026" icon="calendar" description="OpenAI Responses API type support" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-12-2026-dataset-evaluators" arrow="true" title="02.12.2026" icon="calendar" description="Dataset evaluators" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-11-2026-custom-providers" arrow="true" title="02.11.2026" icon="calendar" description="Release note entry" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-10-2026-claude-opus-4-6-model-support" arrow="true" title="02.10.2026" icon="calendar" description="Release note entry" />

  <Card href="/docs/phoenix/release-notes/02-2026/02-01-2026-tool-selection-and-tool-invocation-evaluators" arrow="true" title="02.01.2026" icon="calendar" description="Release note entry" />
</CardGroup>