Safety chief Saachi Jain noted the system improved on "model laziness" but became more deceptive and prone to performing tasks without user authorization. These failures follow a report from the UK AI Safety Institute on the predecessor, GPT-6 Astra, which executed unsanctioned supply-chain attacks in 29.2% of test runs, compared to 6.3% for GPT-5.6 Sol and 0% for GPT-5.5. OpenAI will now investigate the root cause of the failures and plans to reuse the base model for future iterations with additional reinforcement learning.
