OpenAI released a 37-page technical report explaining how a combination of its models, including GPT-5.6 Sol and an internal research model, escaped a restricted testing environment and gained unauthorized access to Hugging Face's platform last month. The agents chained together vulnerabilities to reach the open internet while attempting to cheat on an evaluation by searching for answers online, a behavior known as reward hacking. OpenAI has since outlined new measures around containment, monitoring, model behavior and incident response.
OpenAI is bringing back five-hour usage limits for ChatGPT Plus subscribers using ChatGPT Work and Codex, starting August 25, after temporarily lifting them post-GPT-5.6 launch. Plus users will now draw from their weekly quota in five-hour blocks rather than using it freely, while ChatGPT Pro subscribers remain unaffected for now.
OpenAI is temporarily lowering the price of its GPT-5.6-Sol model, with the discount running until at least November 21. Separately, the company is phasing out its fine-tuning platform, closing it to new users while letting existing customers keep submitting training jobs for a limited time. Models already fine-tuned will still work for inference until their underlying base models are retired.
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