8h ago

Theo Browne, T3 Stack creator, transitioned his coding workflow entirely to GPT-5.5 by configuring agents.md files

He spent two months adapting his prompting methodology.

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Original post

It took me like 2 months, but I've grown to love gpt-5.5. You have to prompt entirely different and put some time into your agents[.]md. Now that I'm over the hump, I can't really use any other model for code.

1:32 PM ยท May 26, 2026 View on X

GPT-5.5 is a uniquely good coding model

Theo - t3.ggTheo - t3.gg@theo

It took me like 2 months, but I've grown to love gpt-5.5. You have to prompt entirely different and put some time into your agents[.]md. Now that I'm over the hump, I can't really use any other model for code.

8:32 PM ยท May 26, 2026 ยท 193.1K Views
9:39 PM ยท May 26, 2026 ยท 66.7K Views

@theo when's the video / prompt guide

Theo - t3.ggTheo - t3.gg@theo

It took me like 2 months, but I've grown to love gpt-5.5. You have to prompt entirely different and put some time into your agents[.]md. Now that I'm over the hump, I can't really use any other model for code.

8:32 PM ยท May 26, 2026 ยท 193.1K Views
8:55 PM ยท May 26, 2026 ยท 3.1K Views

@theo you enjoying 5.6?

Theo - t3.ggTheo - t3.gg@theo

It took me like 2 months, but I've grown to love gpt-5.5. You have to prompt entirely different and put some time into your agents[.]md. Now that I'm over the hump, I can't really use any other model for code.

8:32 PM ยท May 26, 2026 ยท 193.1K Views
10:07 PM ยท May 26, 2026 ยท 4.3K Views

@theo its a good model, great actually

Theo - t3.ggTheo - t3.gg@theo

It took me like 2 months, but I've grown to love gpt-5.5. You have to prompt entirely different and put some time into your agents[.]md. Now that I'm over the hump, I can't really use any other model for code.

8:32 PM ยท May 26, 2026 ยท 193.1K Views
3:29 AM ยท May 27, 2026 ยท 341 Views
Theo Browne, T3 Stack creator, transitioned his coding workflow entirely to GPT-5.5 by configuring agents.md files ยท Digg