My Model Stack After the Wildest 8 Days in AI: Opus 4.5: Most daily...
Matt Shumer@mattshumer_
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Dec 01, 2025
~1 min read
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My Model Stack After the Wildest 8 Days in AI:
Opus 4.5: Most daily code tasks where I know how I want the model to do what I want. Fast, clean, reliable, but often starts writing code before it grabs all the context it needs (measures once, cuts twice).
Codex‑Max: Larger, more difficult code tasks (especially backend) where I don't want to prescribe the best way to do something. Explores before it acts, so it's often more reliable (measures twice, cuts once).
GPT‑5.1 Pro: Deep planning, research, high-stakes work (again, especially backend) where I can't afford to be wrong. If I don't want to have to deal with correcting subtle mistakes, I reach for GPT-5.1 Pro. It just gets things right the first time (but it's super slow, and stuck in the ChatGPT interface).
Gemini 3 Pro: Writing, general reasoning, and UI design. Best at making frontends look polished rather than like AI slop, but less reliable than others on general code tasks.
Opus 4.5: Most daily code tasks where I know how I want the model to do what I want. Fast, clean, reliable, but often starts writing code before it grabs all the context it needs (measures once, cuts twice).
Codex‑Max: Larger, more difficult code tasks (especially backend) where I don't want to prescribe the best way to do something. Explores before it acts, so it's often more reliable (measures twice, cuts once).
GPT‑5.1 Pro: Deep planning, research, high-stakes work (again, especially backend) where I can't afford to be wrong. If I don't want to have to deal with correcting subtle mistakes, I reach for GPT-5.1 Pro. It just gets things right the first time (but it's super slow, and stuck in the ChatGPT interface).
Gemini 3 Pro: Writing, general reasoning, and UI design. Best at making frontends look polished rather than like AI slop, but less reliable than others on general code tasks.
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I'll be sharing a more detailed blog post on this soon.
If you want to be the first to see it, go here: tally.so/r/w2M17p
If you want to be the first to see it, go here: tally.so/r/w2M17p
