GPT-5.6 Sol Leads Cybersecurity Tests
scaling01 · x · 2026-07-14
Early access tests by the UK AISI indicate that GPT-5.6 Sol is on par with or slightly outperforms Claude Mythos 5 in cybersecurity capabilities.
The post shares two specific results:
- In the "The Last Ones" test, GPT-5.6 Sol completed the task 7 out of 10 times, compared to 6 for Claude Mythos 5.
- In the "Doing Life" challenge, GPT-5.6 Sol reached step 21/23 in 3 out of 10 attempts, tying with Claude Mythos 5.
The original post notes that these results come from the UK AISI's cyber suite early testing and are available in the system card.
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