OpenAI Gives GPT‑5.5 Cyber to UK Banks, Anthropic Block
SkimNews Take
The restricted availability of specialized AI tools creates a market dynamic where competitors can gain significant traction by offering comparable solutions with a more accessible deployment strategy.
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- OpenAI offered nine major UK banks access to its GPT‑5.5 Cyber security AI after Anthropic blocked them from Mythos.
- The AI Security Institute found Mythos and GPT‑5.5 Cyber achieved a similar performance level in its security testing tasks.
- Andrew Bailey warned that UK banks still could not access Mythos to test their own digital systems.
- Lloyds, HSBC and Nationwide are among the banks now granted GPT‑5.5 Cyber access; NatWest and Santander already have it.
- Anthropic says Mythos sits in a tier above GPT‑5.5 Cyber, has invested $100 million in the preview, and is expanding access cautiously beyond the initial 42 companies.
Why it matters: UK banks like Lloyds, HSBC and Nationwide gain AI‑powered vulnerability scanning, while Anthropic’s limited Mythos access keeps its premium tool exclusive, widening the security gap between firms that can afford OpenAI’s service and those left without comparable defenses.
