OpenAI researcher Josh McGrath compares GPT-5 Thinking on high reasoning to the original Deep Research model in response to user workflow preferences.
Prediction Not checkable as stated
McGrath: Specialized and Frontier Reasoning AI Models Will Eventually Converge
“You know, I think if you look at like deep research, the original one and GPT-Five thinking on like high reasoning today, I think you'll see that like eventually the models all sort of converge in their capabilities.”
Insight
McGrath: RLHF and RLVR differ by data quality, not optimization math
“Really, at the end of the day, like, RLHF, RLVR,
They're both policy gradient methods, but the, what's different is just like the input data.”
Insight
McGrath: DeepSeek Math's real breakthrough is verifiable reward trust, not GRPO
“As you said, it came out in the deep seek math paper, and like, it's an interesting optimization method, but it's like the more interesting thing that they have a new reward signal that they sort of like re that we can really, really trust. Like when, you know…”
Insight
McGrath: RL runs have far more infrastructure failure points than pre-training
“The issue with RL is, like, you're doing tasks, and each task could have, like, a different grading setup, and each one of those different grading setups, that's, like, more infrastructure, and so, You know, when I'm staying up late trying to figure out what's…”
Insight
McGrath: Design specs let Codex complete hours of coding in 15 minutes
“If I spend, like, you know, 30, 40 minutes writing something that looks like a design doc or something, Codex can do more work than I can do in a few hours in, like, 15 minutes.”
Assertion Partly supported
McGrath: GPT-5.1 dramatically reduced token usage over GPT-5 while boosting evals
“Yeah, and so you can see, like, from five to 5.1, our overall evals, you know, we bumped some. But if you look at a two D plot of how many tokens it takes for us to get that, it went way down.”