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TRUE, BUTRented Halo

The word zero-day got added in post.

“OpenAI's new GPT-5.6-Cyber model found two previously undocumented Chrome V8 flaws (billed as zero-days) and completes 95% of advanced cybersecurity requests the standard model refuses.”

OpenAI (Daybreak expansion announcement), 10 August 2026

Recorded 13 August 2026. Our ruling means: literally true, materially misleading.

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Receipts pack

The evidence file for this verdict

6 receipts: 1 support the claim, 3 contradict it, 2 add context. 3 figures on the record, 2 traced to a quoted receipt.

The receipts

Each source, the line we quote from it, its date and which way it cuts. Free to read and to cite.

  1. 1Supports the claimhelpnetsecurity.com ↗

    OpenAI says its own researchers used GPT-5.6-Cyber to find bugs no one had documented before, including two flaws in V8, the JavaScript engine behind Chrome, that could be chained to corrupt memory and escape the browser's sandbox.

    Look up an archived copy ↗

  2. 2Contexthelpnetsecurity.com ↗

    GPT-5.6-Cyber completed 95% of these requests. The standard, guardrail-enabled version of GPT-5.6 completed 1.5%.

    Look up an archived copy ↗

  3. 3Contradicts the claimmallory.ai ↗

    No public exploit code observed for this vulnerability.

    Look up an archived copy ↗

  4. 4Contradicts the claimeesel.ai ↗

    That measures how often the model responds, not how often it is correct. It is a refusal metric wearing a capability metric's clothes

    Look up an archived copy ↗

  5. 5Contradicts the claimeesel.ai ↗

    On OpenAI's own vulnerability discovery and report writing evaluation, GPT-5.6-Cyber scores worse than plain Sol

    Look up an archived copy ↗

  6. 6Contextthe-decoder.com ↗

    Google fixed the flaws after coordinated disclosure and assigned them the CVE-2026-15903 designation

    Look up an archived copy ↗

Members' extras

What each receipt proves, and what would change our mind.

  • What each receipt above proves, in our words
  • The figures table, each number traced to the receipt that states it
  • The trick behind the claim, explained, with the guide to spotting it
  • What would change our verdict
  • Our call on the record, with its due date

The verdict, the opening and every receipt above stay free. Membership adds our analysis to the evidence file for every checked story.

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