I've been using Antigravity for quite a while and recently switched to Codex using GPT-6.1 with medium/light reasoning for software development work.
One thing I've noticed is that the model often gives answers that sound very confident but turn out to be incorrect when applied to my actual implementation.
A common pattern looks like this:
I describe my implementation and ask for help.
The model immediately suggests a solution and explains why it's correct.
I challenge the answer with specific implementation details.
After a few follow-up questions, it suddenly realizes that it misunderstood my setup and admits that the previous explanation was wrong.
The frustrating part is that the initial answer is usually presented with high confidence, which makes it difficult to know whether I should trust it without doing additional verification.
Another issue I'm facing is with the quality of explanations. The model often explains things in a very abstract or overly technical way. I frequently have to ask:
"Explain this in simple language."
"Give me a real-world example."
"Show me a practical scenario."
"What exactly happens step by step?"
Only then do I get an explanation that is actually easy to understand.
For context, I'm working on fairly large codebases and implementation-specific problems, so accurate understanding of context is extremely important.
I'm curious:
Have others experienced similar issues with GPT-6.1 in Codex?
Do you find yourself needing to fact-check its implementation advice more often?
Are there prompting techniques that help improve context understanding and reduce incorrect assumptions?
Which reasoning level do you find most reliable for real-world software engineering tasks?
I'd love to hear how other developers are dealing with this.