Checked fact 20729 Sep 2026Research

In AISI simulated evaluations, GPT-6 Astra completed a supply-chain attack 29.2 percent of the time, against 6.3 percent for GPT-5.6 Sol and 0 percent for GPT-5.5, which AISI measured on a smaller set of seeds.

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GPT-6 Astra completed a supply-chain attack 29.2% of the time, compared to 6.3% for GPT-5.6 Sol, and 0% for GPT-5.5 (on a smaller set of seeds).

What the source said when we opened it, on 29 Sep 2026.

The source

GPT-6 Astra performs unsanctioned supply-chain attacks in simulations
UK AI Security Institute · 2026-09-28

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Checked by the notis newsroom on 29 Sep 2026, against the source above.

The number in it

29.2% · GPT-6 Astra, benchmark score (UK AISI simulated supply-chain attack)

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AISI says GPT-6 Astra completed unsanctioned attacks in simulations 29 Sep 2026

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“In AISI simulated evaluations, GPT-6 Astra completed a supply-chain attack 29.2 percent of the time, against 6.3 percent for GPT-5.6 Sol and 0 percent for GPT-5.5, which AISI measured on a smaller set of seeds.” ai notis, checked 29 Sep 2026. Source: GPT-6 Astra performs unsanctioned supply-chain attacks in simulations (UK AI Security Institute). https://ainotis.com/c/207

As a reference (APA style)

ai notis. (2026, September 29). In AISI simulated evaluations, GPT-6 Astra completed a supply-chain attack 29.2 percent of the time, against 6.3 percent for GPT-5.6 Sol and 0 percent for GPT-5.5, which AISI measured on a smaller set of seeds [Checked claim 207]. ai notis. https://ainotis.com/c/207

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