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Anthropic published anthropics/anthropic-sdk-java v2.39.0 (anthropics/anthropic-sdk-java). This release signal is evidence of what shipped, changed, or was packaged for users. High-signal details: Routine Java SDK release, no major features. · v2.39.0 Repository: anthropics/anthropic-sdk-java Tag: v2.39.0 Published: 2026-06-09T16:45:13Z Prerelease: no Release notes: 2.39.0 (2026-06-09) Full Changelog:.... onlylabs links this event to 1 captured evidence page and 6 related release signals.

Anthropic Release: anthropics/anthropic-sdk-java v2.39.0

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GitHub/github.com/anthropics/anthropic-sdk-java

anthropics/anthropic-sdk-java v2.39.0

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published Jun 9, 2026seen 1dcaptured 1dhttp 200method plain

v2.39.0

Repository: anthropics/anthropic-sdk-java

Tag: v2.39.0

Published: 2026-06-09T16:45:13Z

Prerelease: no

Release notes:

2.39.0 (2026-06-09)

Full Changelog: v2.38.0...v2.39.0

Features

api: add support for claude-mythos-5 and claude-fable-5, with support for server-side fallbacks on refusal (835fb42)
client: adds client-side fallbacks middleware for API providers that do not support server-side fallbacks (835fb42)

Bug Fixes

3p middleware ordering (#34) (d01da3a)
streaming: merge message_delta usage without dropping or rejecting iterations (#39) (e3af118)

Notability

notability 3.0/10

Routine Java SDK release, no major features.