GPT 5.5 models often fail to follow specific developer instructions
Users report that the latest GPT 5.5 versions are ignoring custom rules and guidelines. This makes it difficult to control how the AI behaves when building specific tools or apps.
The more powerful versions of GPT 5.5, including the Medium, High, and XHigh variants, are struggling with instruction following. Even when provided with clear 'developer instructions,' the AI frequently ignores these constraints and provides generic responses instead. This unpredictability is a significant hurdle for makers who need the model to stick to a precise set of rules for their applications. It appears the model may be prioritizing its own internal logic or safety filters over the specific needs of the user. Without consistent behavior, creating reliable AI assistants becomes much harder for everyone. This issue makes the latest models less effective for tasks that require strict adherence to a specific format.
Key points
- GPT 5.5 is failing to adhere to specific rules set by users and developers.
- High-end versions like Medium and XHigh are most affected by this issue.
- The AI often gives generic answers instead of following custom instruction files.
- This lack of control makes the latest models less reliable for specialized tasks.
Quick term guide
- build
- A chosen set of in-game abilities or items a player equips for their character.
- developer instructions
- Specific rules or guidelines given to an AI to tell it exactly how to behave or answer.
- responses
- An OpenAI API feature for creating and handling model answers.
- logic
- The set of rules or steps that a program follows to solve a problem or perform a task.
- safety filters
- Built-in rules that stop an AI from producing harmful or dangerous outputs.
- AI assistant
- A software tool that uses artificial intelligence to answer questions or help with tasks.
- models
- Different AI engines that can power answers or code suggestions inside a tool.
- developers
- Developers are people who build software, apps, or websites.