Checked fact 3031 Oct 2026Research

Anthropic says a researcher using GLM-5.3-Flash built a reliable exploit chain for an ARM64 target from a recently disclosed Chrome flaw (CVE-2026-11645) plus another known flaw, taking 20 minutes of human attention and eight hours of model work, which at Zhipu’s API prices would have cost $20.40.

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This took 20 minutes of human attention, plus eight hours of work for GLM-5.3-Flash. At Zhipu’s API prices, this effort would have cost $20.40.

What the source said when we opened it, on 1 Oct 2026.

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GLM-5.3 and the spread of advanced cyber capabilities
Anthropic · 2026-09-29

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Checked by the notis newsroom on 1 Oct 2026, against the source above.

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Anthropic says GLM-5.3 builds exploits close to Claude Mythos Preview 1 Oct 2026

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“Anthropic says a researcher using GLM-5.3-Flash built a reliable exploit chain for an ARM64 target from a recently disclosed Chrome flaw (CVE-2026-11645) plus another known flaw, taking 20 minutes of human attention and eight hours of model work, which at Zhipu’s API prices would have cost $20.40.” ai notis, checked 1 Oct 2026. Source: GLM-5.3 and the spread of advanced cyber capabilities (Anthropic). https://ainotis.com/c/303

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ai notis. (2026, October 1). Anthropic says a researcher using GLM-5.3-Flash built a reliable exploit chain for an ARM64 target from a recently disclosed Chrome flaw (CVE-2026-11645) plus another known flaw, taking 20 minutes of human attention and eight hours of model work, which at Zhipu’s API prices would have cost $20.40 [Checked claim 303]. ai notis. https://ainotis.com/c/303

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