ToolsThe story, in brief
OpenAI says old prompts are holding GPT-5.5 back and developers need a fresh baseline
GPT-5.5 breaks your old prompts. Here's what developers need to rewrite.
The KeyNews take
Why it matters
OpenAI is signaling a significant shift in how GPT-5.5 handles prompting strategy—old patterns won't transfer, forcing developers to rebuild their prompt frameworks from scratch. This has immediate implications for production systems and engineering velocity.
The key facts
4 to knowGPT-5.5 requires fresh prompts; legacy prompts no longer optimal
Minimal starting baseline recommended
Role definitions re-elevated as critical framework component
Breaks backward compatibility with GPT-5 prompt patterns
Go to the source
The Decoderthe-decoder.com
Publisher excerpt: OpenAI says developers shouldn't carry over old prompts for GPT-5.5. Instead, start minimal and from scratch. Role definitions, which some had written off as unnecessary, are back at the front of the framework.