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arize-phoenix: v20.4.0

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@mikeldking mikeldking released this 26 Aug 03:46
arize-phoenix-v20.4.0
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20.4.0 (2026-08-26)

⚠ BREAKING CHANGES

  • server: GET /v1/model_providers no longer returns custom providers or a next_cursor, and built-in entries expose provider rather than kind + provider_key. Custom providers move to GET /v1/custom_model_providers. The endpoint is unreleased, so no published client is affected.

Features

  • agents: add in-process Phoenix MCP toolset (#15285) (e2cf8be)
  • apply the 2026 brand to the Phoenix docs (#15458) (66c528c)
  • client: record Harbor jobs in Phoenix (#15547) (f7c6cb3)
  • evals: add retrieval relevance evaluator (#14766) (7efa7b2)
  • playground: add gemini-3.7-flash (#15520) (2435eba)
  • pxi: enable phoenix-gql mutations by default with approval in manual mode (#15415) (391d0dd)
  • pxi: replace client-action tools with browser-action meta-tools (#15316) (ce13c6f)
  • server: add GET /model_providers REST endpoint (#15561) (59c247a)
  • server: add PATCH /projects/{project_identifier}/retention (#15410) (8ffd938)
  • traces: AI Query for the trace filter DSL (#15461) (31afcc7)

Bug Fixes

  • agents: forbid extra fields on UI context models (#15621) (f08a46c)
  • auth: polish password reset and user management (#15521) (7a65831)
  • chat-completions: preserve prompt cache usage (7a5bc55)
  • cost: update built-in model token prices (5150c4d)
  • cost: update built-in model token prices (#15562) (ad9b3a1)
  • cost: update built-in model token prices (#15590) (4580f34)
  • deps: update arize-phoenix-client to 3.2.0 (1989459)
  • deps: update arize-phoenix-evals to 3.5.0 (#15574) (55184f4)
  • deps: update arize-phoenix-evals to 3.5.1 (#15605) (5e2becf)
  • evals: do not echo submitted tool JSON in evaluator prompt validation errors (#15575) (d38df33)
  • handle missing annotation labels with pandas 3 (#15486) (aebe53f)
  • mcp/sql: parenthesise an operator key in a postgres JSON read (7b77585)
  • mcp/sql: parenthesise BETWEEN and IN keys in a postgres JSON read (f12126c)
  • upgrade to anthropic SDK v1 (#15588) (b28cf94)

Performance Improvements

  • agents: make the system prompt static and move UI state onto the turn (#15541) (31fafc5)

Documentation

  • Add Phoenix release notes — 2026-08-19 (#15502) (506ebdc)
  • close PXI / agent-assistant documentation gaps for Phoenix 20 (#15499) (729ff11)
  • group Arize AX pages under a dedicated left-nav item (45ddcbf)
  • polish Phoenix vs Arize AX comparison page and fix stale references (cfda2fa)
  • remove legacy evaluator docs (#14933) (5ece969)
  • restore redirects for the removed legacy evaluator pages (#15579) (840fa1e)
  • surface agent-first onboarding in Phoenix quickstarts (bd13ea9)

Miscellaneous Chores

Assets 2
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