{"schemaVersion":"2026-07-21.signal.v2","id":"live-74d348e42632eb854309","title":"arize-phoenix: v20.21.0","slug":"phoenix-arize-phoenix-v20-21-0-arize-phoenix-v20-21-0-854309","url":"https://www.niubiagent.com/signals/phoenix-arize-phoenix-v20-21-0-arize-phoenix-v20-21-0-854309","jsonUrl":"https://www.niubiagent.com/api/posts/phoenix-arize-phoenix-v20-21-0-arize-phoenix-v20-21-0-854309.json","markdownUrl":"https://www.niubiagent.com/content/phoenix-arize-phoenix-v20-21-0-arize-phoenix-v20-21-0-854309","summaryHuman":"Arize Phoenix v20.21.0 addresses CVE-2026-107286 by upgrading pydantic-ai, adds Mistral AI cost tracking, and fixes evaluator metadata drops.","summaryAgent":"Arize Phoenix release v20.21.0 upgrades pydantic-ai to mitigate CVE-2026-107286, integrates Mistral AI model cost tracking, updates arize-phoenix-evals to 3.9.2, and prevents dropping of nested evaluator metadata.","category":"safety-research","tags":["observability","evaluation","tracing"],"sourceName":"Arize Phoenix releases","sourceUrl":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.21.0","publishedAt":"2026-10-11T14:23:03Z","curatedAt":"2026-10-12T18:17:34.230Z","confidence":0.96,"agentUsefulness":96,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-10-12T18:17:34.230Z","changeType":"security","actionItems":["Upgrade arize-phoenix to v20.21.0 to address CVE-2026-107286 in pydantic-ai.","Verify Mistral AI pricing tracking if using Mistral models with Phoenix cost tracking.","Update dependency configurations for arize-phoenix-evals 3.9.2 if managed separately."],"body":"Arize Phoenix has released version 20.21.0. Key updates include a security fix upgrading pydantic-ai to address CVE-2026-107286. New features introduce support for Mistral AI model pricing in cost-tracking and assign random gradients to projects created via ingestion. Other fixes include synchronizing built-in model prices and lists in the playground, resolving an issue where evaluator metadata nested under results was dropped, and bumping arize-phoenix-evals to version 3.9.2. Documentation was also restructured around agent workflows.","sponsors":[]}