CLAUDE LABJP
2.1.269 — A broad release with 98 CLI changes. The one worth your attention is claude plugin eval, which finally lets you measure whether a plugin earns its placeEVAL — Every case runs three times with the plugin loaded and three times without, so the number you get back is the difference the plugin makes, not just a pass or a failGRADER — Three kinds of grader are available: a regex over the reply, a check for whether a particular tool was called, and a rubric judged by a second modelDIFF — The Bash tool result now includes a diff of the files a command changed. Turn it on with bashEditDiffEnabledSTYLE — /output-style [name] lists and switches output styles, including over Remote Control and in cloud or headless sessionsOTEL — OTEL_METRICS_INCLUDE_REPOSITORY tags metrics and events with vcs. repository attributes, and commit events carry vcs.ref.head2.1.269 — A broad release with 98 CLI changes. The one worth your attention is claude plugin eval, which finally lets you measure whether a plugin earns its placeEVAL — Every case runs three times with the plugin loaded and three times without, so the number you get back is the difference the plugin makes, not just a pass or a failGRADER — Three kinds of grader are available: a regex over the reply, a check for whether a particular tool was called, and a rubric judged by a second modelDIFF — The Bash tool result now includes a diff of the files a command changed. Turn it on with bashEditDiffEnabledSTYLE — /output-style [name] lists and switches output styles, including over Remote Control and in cloud or headless sessionsOTEL — OTEL_METRICS_INCLUDE_REPOSITORY tags metrics and events with vcs. repository attributes, and commit events carry vcs.ref.head
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haiku-4-5

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API & SDK/2026-04-12Advanced

Intelligent Model Routing with Claude API — Auto-Selecting Sonnet 4.6 and Haiku 4.5 for Optimal Cost and Quality

Build an intelligent routing layer that automatically selects between Claude Sonnet 4.6 and Haiku 4.5 based on request complexity. Covers classifier design, circuit breakers, fallback chains, and cost monitoring for production deployments.

Claude AI/2026-03-16Intermediate

Claude Haiku 4.5 — Build Real-Time AI Apps at a Fraction of the Cost

Claude Haiku 4.5: 200K context, SWE-bench 73.3%, Extended Thinking, $1/$5 pricing. When to use Haiku vs Sonnet/Opus, with Prompt Caching and Batch API tips.