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OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

developers.openai.com

91–100 of 174 posts

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#91
post #85

Exactly double the cost of GPT 5.4 - $5 per MTok input, $0.50 cached, $30 output. All the AI players definitely seem to be trying to claw more money out of their users at the moment.

https://openrouter.ai/openai/gpt-5.5-pro 30/180 usd on Openrouter. Did I miss something?

I think that's Pro. Regular 5.5 is 2x regular 5.4.

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#92
GPT 5.5 is close to Opus 4.7, but at 7x the cost[0]...

Either Opus 4.7 miscounts reasoning tokens, or it's A LOT more efficient than GPT 5.5

I thought they made GPT 5.5 more token efficient than 5.4, but it uses 2x the reasoning tokens.

[0]: https://aibenchy.com/compare/openai-gpt-5-5-medium/openai-gp...

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#93
post #69

Earlier quoted context omitted.

That’s actually crazy, what kind of task is that? And is that a recurring kind of task like some analysis, or coding related?

Coding (along with docs, tests obviously), rewriting a huge chunk of the KVM hypervisor (in Kernel 7, started in the -rc2) and KSM and other modules, can't say too much about it yet (might do an announcement in coming weeks) . The coding is automated but the plan took days of manual arguing (with all models possible) prior (while doing other things during waiting times as I currently manage 70 repos for an upcoming r…

Please do an update when you're ready, this sounds like madness to me so I'd love to see what the output is. Whatever it is I have to know.

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#94
post #79

Earlier quoted context omitted.

gemma4-e4b is 50% better than gemma4-26b in your benchmark, something's wrong

Yes those two models were tested on my own PC (local inference using my own CPU/GPU). So something my be bugged on my setup. gemma4-26b should be far better than gemma4-e4b.

Sounds like maybe using worse quantization on the bigger model? Quantization matters a lot for the quality, basically anything below Q8 is borderline unusable. If it isn't specified in a benchmark already it probably should.

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#95
I don't see any meaningful performance improvements in those paid models anymore.

They all roughly produce junior developer-level code, continue to have mental breakdowns in their “thinking” stage, occasionally hallucinate things, delete pieces of code/docs they don’t understand or don’t like, use 1.5 times the necessary words to explain things when generating docs and so on.

I'm now testing "avoid sycophancy, keep details short and focus on the facts" in my AGENTS.md files.

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#96
I'm absolutely stunned by what I've seen from 5.5. I thought it'd be a nothingburger and ~= Opus.

Gave it two very long-running problems I haven't had the courage to work on in the last 2.5 years, solved each within an hour.

- An incremental streaming JSON decoder that can optionally take a list of keys to stop decoding after. 1800 LOC about 30 minutes later, and now my local-first apps first sync time is 0.8s instead of 75s when there's 1.5 GB of data locally.

- Flutter Web can compile to WASM and then render via Skia WASM. I've been getting odd crashes during rapid animation for months. In an hour, it got Skia WASM checked out, building locally, a Flutter test script, and root caused the issue to text shadows and font glyphs (technically, not solved yet, I want to get to the point we have Skia / Flutter patch(es))

If you told me a week ago that an LLM could do either of these, without heavy guidance, I'd be stunned. And I regularly push them to limits, ex. one of Opus' last projects was a tolerant JSON decoder, and it ended up being 8% faster than the one built-in to Dart/Flutter, which has plenty of love and attention. (we're cheating a little, that's why it's faster. TL;DR: LLMs will emit control characters in JSON and that's fine for me, treating them as fine means file edit error rates go from ~2% to 0%)

I just wish it was cheaper, but, don't we all...

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#97
post #95

I don't see any meaningful performance improvements in those paid models anymore. They all roughly produce junior developer-level code, continue to have mental breakdowns in their “thinking” stage, occasionally hallucinate things, delete pieces of code/docs they don’t understand or don’t like, use 1.5 times the necessary words to explain things when generating docs and so on. I'm now testing "avoid sycophancy, keep d…

This is snark. Since when has a junior level dev managed to debug and deploy say a cloudformation stack and follow up with notes under 3 minutes?

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#98
post #95

I don't see any meaningful performance improvements in those paid models anymore. They all roughly produce junior developer-level code, continue to have mental breakdowns in their “thinking” stage, occasionally hallucinate things, delete pieces of code/docs they don’t understand or don’t like, use 1.5 times the necessary words to explain things when generating docs and so on. I'm now testing "avoid sycophancy, keep d…

[dead]

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#99
post #68

Earlier quoted context omitted.

The doctor would be responsible for the accuracy of their translation tool, something they can't verify but you expect them to use?

What's the alternative then ? -> You are in China, you go to emergency, nobody speaks your language Move hands ? DeepSeek is better than using hands, even Baidu Translate, ChatGPT or whatever you find. Other solutions are theoretically nice on paper but almost delusional. An imperfect solution is better than no solution. == Similarly, a deaf-person is theorically better with a certified interpreter that can talk with…

When I registered with my GP in the UK, they asked me whether I would need an interpreter and what language. They then provide professional interpreters.

https://www.england.nhs.uk/interpreting/

Re: OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API

#100
post #97
post #95

I don't see any meaningful performance improvements in those paid models anymore. They all roughly produce junior developer-level code, continue to have mental breakdowns in their “thinking” stage, occasionally hallucinate things, delete pieces of code/docs they don’t understand or don’t like, use 1.5 times the necessary words to explain things when generating docs and so on. I'm now testing "avoid sycophancy, keep d…

This is snark. Since when has a junior level dev managed to debug and deploy say a cloudformation stack and follow up with notes under 3 minutes?

Heard this analogy elsewhere, but worth repeating:

AI is like having the greatest developer who ever lived, but she is always on 4 beers.

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