2.2.64

Name: opik
Author: comet-ml

comet-ml/opik2.2.64Sep 15, 2026by github-actions[bot]

Upgrading?

What changed from 2.2.63 → 2.2.64?What's new in 2.2.65 after 2.2.64?

AI Summary

This release focuses on bug fixes for the SDK and backend, including duplicate item handling and OpenTelemetry error responses. It also features performance optimizations for the Playground interface and introduces new analytics events for MCP connections.

Key Highlights

Fixed duplicate item rejection in SpearmanRanking SDK method
Resolved OpenTelemetry 500 errors for requests with no data to store
Improved Playground performance by virtualizing the output grid
Added BI event emission for new MCP connections

New Features

Emit opik_mcp_connected BI event on a new MCP connection

Full Release Notes

## What's Changed
* [NA] [SDK] fix: reject duplicate items in SpearmanRanking by @anxkhn in https://github.com/comet-ml/opik/pull/7290
* [NA] [SDK] fix: offer to remove the uv tool install that hijacks `uvx opik-mcp` by @alexkuzmik in https://github.com/comet-ml/opik/pull/8313
* [OPIK-7791] [QA] Proposed e2e specs from the 2.2.59 → 2.2.60 release exploration by @CometActions in https://github.com/comet-ml/opik/pull/8307
* [OPIK-7791] [QA] Proposed e2e specs from the 2.2.60 → 2.2.61 release exploration by @CometActions in https://github.com/comet-ml/opik/pull/8314
* [OPIK-8334] [BE] fix: stop answering 500 for an OpenTelemetry request with nothing to store by @thiagohora in https://github.com/comet-ml/opik/pull/8264
* [OPIK-8005] [FE] perf: virtualize the Playground output grid by @andriidudar in https://github.com/comet-ml/opik/pull/8312
* [OPIK-8344] Emit opik_mcp_connected BI event on a new MCP connection by @awkoy in https://github.com/comet-ml/opik/pull/8284


**Full Changelog**: https://github.com/comet-ml/opik/compare/2.2.63...2.2.64

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