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GPT-5.2 and GPT-5.2-Codex are now 40% faster

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Re: GPT-5.2 and GPT-5.2-Codex are now 40% faster

#5

It’s interesting that they kept the price the same while doing inference on Cerebras is much more expensive.

I dont think this is Cerebras. Running on cerebras would change model behavior a bit and it could potentially get a ~10x speedup and it'd be more expensive. So most likely this is them writing new more optimized kernels for Blackwell series maybe?

Re: GPT-5.2 and GPT-5.2-Codex are now 40% faster

#7
post #5

It’s interesting that they kept the price the same while doing inference on Cerebras is much more expensive.

I dont think this is Cerebras. Running on cerebras would change model behavior a bit and it could potentially get a ~10x speedup and it'd be more expensive. So most likely this is them writing new more optimized kernels for Blackwell series maybe?

Fair point but it remains to answer - why isn’t this speed up available in ChatGPT and only in the api?

Re: GPT-5.2 and GPT-5.2-Codex are now 40% faster

#9
OpenAI in my estimation has the habit of dropping a model's quality after its introduction. I definitely recall the web ChatGPT 5.2 being a lot better when it was introduced. A week or two later, its quality suddenly dropped. The initial high looked to be to throw off journalists and benchmarks. As such, nothing that OpenAI says in terms of model speed can be trusted. All they have to do is lower the reasoning effort on average, and boom, it becomes 40% faster. I hope I am wrong, because if I am right, it's a con game.

Starting off the ChatGPT Plus web users with the Pro model, then later swapping it for the Standard model -- would meet the claims of model behavior consistency, while still qualifying as shenanigans.

Re: GPT-5.2 and GPT-5.2-Codex are now 40% faster

#10

This is great. In the past month, OpenAI has released for codex users: - subagents support - a better multi agent interface (codex app) - 40% faster inference No joke, with the first two my productivity is already up like 3x. I am so stoked to try this out.

Try Claude and you can get x^2 performance. OpenAI is sweating
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