Langfuse 4.63 opens skill management preview

Langfuse shipped v4.63.0 on October 16, 2026, following v4.61.0 and v4.62.0 earlier that day. This note groups the day's related releases rather than creating three near-duplicate launch cards.

What changed

• v4.63.0 exposes skill management as a public v4 preview and adds a skill usage-metrics tab, alongside browsing and editing improvements.
• AI Gateway updates separate gateway keys from organization API keys and attribute errors by origin. Slugless codex-prefixed models route to OpenAI connections.
• Earlier that day, v4.61.0 introduced connection-slug model routing, per-connection model controls and traces for selected skill versions.
• v4.62.0 raised the gateway request limit to 16 MiB and made execution limits configurable.

What to watch

Skill management is explicitly a preview. Gateway and tracing changes do not prove lower latency or better agent quality; those require workload-specific measurements. The release also fixes billable-unit accounting for dual-write observations, so operators should review usage reporting rather than infer that new features are free.

License and cost

The release-tag license uses MIT Expat outside the listed enterprise directories; those directories and third-party components have separate licenses. This is not a blanket MIT claim for every file. Software licensing is separate from hosted-service, inference and infrastructure charges; this note does not claim a free hosted tier.

These changes are reported by the maintainers. We have not independently benchmarked the release.

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