Releasesby Glypharize-phoenix: v13.19.0
13.19.0 (2026-03-26) Features add PromptInput compound component for AI interactions (729a56f) agent-chat: collapse tool calls into expandable pool + streaming perf (39acfcf) agent: session switcher with delete controls and async summaries (1443c29) app: update project creation flow with color picker and description (ccfdcf2) Bug Fixes deps: pin...
Also shipped Mar 26, 2026Arize AI in March 2026 →
Mutual Exclusivity
What it is: Grouping guides and surveys into a mutual exclusivity set ensures each end-user sees at most one from the group. The primary use case is platform-specific announcements: create a version for iOS and another for Android, add both to the group, and users see only the version that matches their device.
Temperature Parameter: Increased Maximum The maximum allowed value for the temperature parameter for Chat...
Temperature Parameter: Increased Maximum The maximum allowed value for the temperature parameter for Chat Completions has been increased from 1.5 to 2.0. This aligns with the range supported by OpenAI, Fireworks, and other major LLM providers. Higher temperature values produce more random and creative outputs.
developer Message Role (gpt-oss-120b) The Chat Completions API now supports the developer message role for...
developer Message Role (gpt-oss-120b) The Chat Completions API now supports the developer message role for gpt-oss-120b, aligning with the OpenAI API message format. The developer role is functionally equivalent to system , the system role remains supported for backwards compatibility. Other models do not support the developer role.
TTS speak speed (Early Access)
You can now control the speaking rate of Deepgram TTS in the Voice Agent API using the agent.speak.provider.speed parameter. This parameter accepts a float value between 0.7 and 1.5 , with 1.0 as the default.
Updated LLM models
New OpenAI models , Two new models are now available in the Standard pricing tier: gpt-5.4-nano gpt-5.4-mini Gemini 2.0 Flash deprecated , The gemini-2.0-flash model is now deprecated. We recommend migrating to gemini-2.5-flash or a newer Gemini model. See the Google models table for alternatives.
Access - Code Mode for MCP server portals
MCP server portals support Code Mode MCP server patterns , a technique that reduces context window usage by replacing individual tool definitions with a single code execution tool. Code Mode is turned on by default on all portals. To turn it off, edit the portal in Access controls > AI controls and turn off Code Mode under Basic information .
More from phoenixEvery phoenix release →
arize-phoenix: v13.18.0
13.18.0 (2026-03-24) Features app: add prompt version diff view (0e9e76b) Replace all markdown rendering with streamdown (d6a64d5)
arize-phoenix-evals: v2.12.0
2.12.0 (2026-03-24) Features evals: accept structured data eval inputs (5f33727) Bug Fixes evals: allow prompt_template and kwargs in built-in classification evaluators (2ec192c) Pin LiteLLM <1.82.7 to mitigate supply chain attack (48970b6) playground: prevent OTel context leak causing duplicate trace_id in dataset runs (2a24625) Documentation evals...
arize-phoenix: v13.17.0
13.17.0 (2026-03-23) Features agent: implement experimental px-gql simulated bash tool (843fa8f) copy spanID to clipboard (a7ded9a) Bug Fixes security: resolve high and moderate dependency vulnerabilities (69ffc21) Starlette 1.0+ TemplateResponse compatibility (43b18b7)
arize-phoenix: v13.20.0
13.20.0 (2026-03-29) Features rest-api: DELETE /prompt_versions/{id}/tags/{tag_name} (0c61d16) rest-api: DELETE /prompts/{prompt_identifier} (ac9ffbe) ui: add CopyField component and clean up settings layout (3c7bd2b)
arize-phoenix: v13.16.0
13.16.0 (2026-03-22) Features Add backend skill (cc8de3b) add configurable package manager preference per language (bf35656) add copy name/ID action menu to nav breadcrumbs (bc3ae84) add copy-to-clipboard to session, span, and trace ID cells (ad32209) add expectedRunCount experiment field and experiments table fraction (d1367fb) add GET /v1/user endpoint...
arize-phoenix: v13.22.0
13.22.0 (2026-04-01) Features ui: updated provider and integration icons, logo icon agent skill (8668c43) Bug Fixes fail loudly on Windows + Python 3.14 install (50d66a3)
arize-phoenix: v13.21.0
13.21.0 (2026-04-01) Features add Python 3.14 support (except Windows) (50c08e3) agent: Improve session summaries (f1750a9) server: REST endpoint for secrets management (39f68cf)
arize-phoenix-evals: v2.13.0
2.13.0 (2026-04-01) Features add Python 3.14 support (except Windows) (50c08e3)