> ## Documentation index
> Fetch the complete documentation index at: https://arize.com/llms.txt
> Ask it with GET https://arize.com/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# 2026

<CardGroup>
    <Card href="/docs/phoenix/release-notes/10-2026/10-13-2026-docker-sandboxes-and-mcp-graphql-tools" arrow="true" title="10.13.2026" icon="calendar" description="Run code evaluators in Docker's hosted sandbox environment, test Claude Haiku 5.5 in the playground, and let MCP clients inspect Phoenix data through GraphQL"/>
    <Card href="/docs/phoenix/release-notes/10-2026/10-01-2026-trace-tree-evals-and-decision-spans" arrow="true" title="10.01.2026" icon="calendar" description="Scan failed evals directly in the trace tree, trace routers and classifiers as DECISION spans, and manage project annotation configs from the TypeScript client"/>
    <Card href="/docs/phoenix/release-notes/09-2026/09-29-2026-editable-dataset-examples-and-trace-metrics" arrow="true" title="09.29.2026" icon="calendar" description="Edit dataset examples in the table and save them as one version, read latency, tokens, and cost on every trace tree row, and mount your own skills into MCP and PXI"/>
    <Card href="/docs/phoenix/release-notes/09-2026/09-14-2026-coding-agent-plugins-and-error-analysis" arrow="true" title="09.14.2026" icon="calendar" description="Phoenix plugins for Claude Code, Codex, and Cursor; error analysis served from the /mcp endpoint; and a Completeness evaluator in both evals SDKs"/>
    <Card href="/docs/phoenix/release-notes/09-2026/09-08-2026-harbor-plugin-for-agent-benchmarks" arrow="true" title="09.08.2026" icon="calendar" description="Record Harbor agent benchmark jobs as Phoenix datasets and experiments, with verifier rewards as evaluations and ATIF trajectories as linked traces"/>
    <Card href="/docs/phoenix/release-notes/09-2026/09-08-2026-model-providers-trace-filters-and-pxi" arrow="true" title="09.08.2026" icon="calendar" description="Z.ai, MiniMax, and Meta as built-in providers; error and latency trace filters in both SDKs; PXI settings in linkable tabs with slash command suggestions"/>
    <Card href="/docs/phoenix/release-notes/09-2026/09-01-2026-github-issues-pii-detection-and-client-updates" arrow="true" title="09.01.2026" icon="calendar" description="PXI files the GitHub issue for the bug it found, with duplicate search, approval on every write, and a token Phoenix never stores; a PII Detection evaluator that screens tool calls and retrieved content as well as the chat, in Python and TypeScript; prompt versions over REST; deletePrompt, transferTraces, setProjectRetentionPolicy, getCurrentUser, and session token counts in the TypeScript client; one approval per PXI browser script; and Claude Fable 5.1 in the playground (arize-phoenix 20.5.0; arize-phoenix-evals 3.6.0; @arizeai/phoenix-evals 2.4.0; @arizeai/phoenix-client 7.6.0–7.7.1)"/>
    <Card href="/docs/phoenix/release-notes/08-2026/08-25-2026-pxi-browser-actions-and-retrieval-relevance" arrow="true" title="08.25.2026" icon="calendar" description="Complete multi-step UI workflows with PXI, evaluate retrieval relevance across any source, build focused trace views faster, and manage retention and model providers through REST (arize-phoenix 20.4.0; arize-phoenix-evals 3.5.0–3.5.1; @arizeai/phoenix-evals 2.3.0)"/>
    <Card href="/docs/phoenix/release-notes/08-2026/08-17-2026-trace-filters-and-analytics-sql" arrow="true" title="08.17.2026" icon="calendar" description="A full expression language for the traces table — trace intrinsics, span rollups, root-span reach-through, and comprehensions over spans, annotations, and cost details, with children, parent_span, and siblings for topology; read-only analytics SQL over the built-in MCP server via describeSqlSchema and executeSql; annotation details on hover with inline filter chips; PXI approval decisions promoted onto TOOL spans as filterable attributes; and consistent dialog, tooltip, and menu behavior across the app (arize-phoenix 20.2.0–20.3.0)"/>
    <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>