Per-message effort changes beta expands to Claude on Google Cloud

BetaSep 3, 2026VerifiedAdded Sep 22, 2026

Per-message effort changes are now available in beta on Google Cloud for Claude Fable 5.1, Claude Mythos 5.1 and Claude Opus 5, using the same mid-conversation-output-config-2026-07-01 beta header.

LLMs

Read Anthropic's release notes

https://platform.claude.com/docs/en/release-notes/overview#september-3-2026

Summaries of vendors' own notes. Product names and logos belong to their owners; logos via logo.dev.

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PricingLLMsPricingSource

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UpdateLLMsSource

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UpdateLLMsDeveloper toolsSource

Claude PlatformSep 1, 2026

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BetaLLMsDeveloper toolsSource

Claude PlatformSep 1, 2026

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BetaPricingSource

Claude PlatformSep 1, 2026

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BetaLLMsSource

Also shipped on Sep 3, 2026

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