✓ No known CVEs patched in this version
Topics
+10 more
ReleasePort's take
Light signalPhoenix 15.12.0 ships eight bugfixes and two features across playground, UI, and cost tracking. Updates include token price accuracy, configuration validation, and improved trace visibility.
Why it matters: Routine maintenance release. Cost accuracy improvements and UI fixes enhance usability. Standard upgrade with no breaking changes; deploy in regular cycles.
Summary
AI summaryUpdates Bug Fixes, 15.12.0, and 2026-05-21 across a mixed release.
Changes in this release
| Type | Severity | Summary | CVE |
|---|---|---|---|
| Feature | Medium |
Stamps tool execution environment on tool-call provider metadata Stamps tool execution environment on tool-call provider metadata Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Feature | Medium |
Enables submitting elicitation responses with Enter key Enables submitting elicitation responses with Enter key Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Bugfix | Medium |
Prevents nested spans table from scrolling independently Prevents nested spans table from scrolling independently Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Bugfix | Medium |
Routes PXI markdown links through router for proper navigation Routes PXI markdown links through router for proper navigation Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Bugfix | Medium |
Updates built-in model token prices for cost accuracy Updates built-in model token prices for cost accuracy Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Bugfix | Medium |
Blocks invalid configuration of custom base URL with env-var key Blocks invalid configuration of custom base URL with env-var key Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Bugfix | Medium |
Removes dated model deployments from model picker dropdown lists Removes dated model deployments from model picker dropdown lists Source: llm_adapter@2026-05-21 Confidence: high |
— |
| Bugfix | Medium |
Shows View Trace link on errored runs when span data exists Shows View Trace link on errored runs when span data exists Source: llm_adapter@2026-05-21 Confidence: high |
— |
Full changelog
15.12.0 (2026-05-21)
Features
- agents: stamp tool execution environment on tool-call provider metadata (#13277) (ef421e5)
- ui: submit elicitation responses with Enter key (#13288) (c74574d)
Bug Fixes
- app: prevent nested spans table scrolling (#13320) (af751b6)
- app: route PXI markdown links through router (#13345) (7490254)
- cost: update built-in model token prices (#13346) (eceff55)
- playground: block custom base URL paired with env-var provider key (#13377) (bb31a52)
- playground: drop dated model deployments from picker lists (#13362) (0068159)
- playground: show View Trace link on errored runs when span exists (#13355) (80ced9f), closes #13130
Documentation
Weekly OSS security release digest.
The CVE patches and breaking changes that affected production tools this week. One email, every Sunday.
No spam, unsubscribe anytime.
Share this release
Related context
Related tools
Earlier breaking changes
- varize-phoenix-v17.0.0 Adds system settings for admin-managed assistant enablement and trace recording policy
- varize-phoenix-v16.0.0 Sandboxing and Code Evaluators introduce breaking changes in Phoenix v16.0.0.
- varize-phoenix-v15.7.0 Removes v1 /chat route and associated code
Beta — feedback welcome: [email protected]