Checked fact 128113 Oct 2026Safety and security

The post says that starting with Claude Sonnet 5.5, "we've made reasoning transcripts accessible only to the organization whose request produced the transcript."

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The exact words it rests on

with Claude Sonnet 5.5, we've made reasoning transcripts accessible only to the organization whose request produced the transcript.

What the source said when we opened it, on 13 Oct 2026.

The source

Strengthening our defenses against distillation attacks
Anthropic · 2026-10-12

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Checked

Checked by the notis newsroom on 13 Oct 2026, against the source above.

In the story

Anthropic says new safeguards cut distillers' extraction of reasoning tokens 13 Oct 2026

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“The post says that starting with Claude Sonnet 5.5, "we've made reasoning transcripts accessible only to the organization whose request produced the transcript.".” ai notis, checked 13 Oct 2026. Source: Strengthening our defenses against distillation attacks (Anthropic). https://ainotis.com/c/1281

As a reference (APA style)

ai notis. (2026, October 13). The post says that starting with Claude Sonnet 5.5, "we've made reasoning transcripts accessible only to the organization whose request produced the transcript." [Checked claim 1281]. ai notis. https://ainotis.com/c/1281

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