GPT‑5.5 Instant

GPT-5.3-instant wasn't even close to instant. Even with lowest effort it's like 3-4x best case TTFT compared to GPT-4.1

I know, I know.. But they are the one's labeling them "instant". There is a real need for a refresh on the datacenter workhorse that is GPT-4.1

Also, how TF are you going to have an "instant" model release and not mention the latency characteristics at all?

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jflskajfsd 5 hours ago | parent | prev | next [-]

Big increase in intelligence at the cheapest price

	▲	lkt 3 hours ago \| parent \| next [-]
		Is it cheap? `chat-latest` on https://developers.openai.com/api/docs/pricing is showing $5/$30 input/output which is the same price as gpt-5.5
	▲	pants2 4 hours ago \| parent \| prev [-]
		I don't see price listed anywhere, do you? This isn't even on their models page yet.

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simianwords 4 hours ago | parent | prev | next [-]

I wonder what's the difference between this and GPT 5.5 thinking with zero thinking effort? Interesting product decision to have different models.

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pants2 4 hours ago | parent [-]

Good question. I find that GPT-5.5 thinking is very good at not thinking for simple questions, so much so that I've never had the need to use the instant model even for quick Q&A.

I'm assuming the instant model, then, is an entirely different smaller model mainly serving the free tier of ChatGPT.

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simianwords 4 hours ago | parent [-]

It is an entirely free model, but it is also the model that most users (even paid) interact with until the router pushes the thinking.

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pants2 4 hours ago | parent | next [-]

Good point. I feel like this does a disservice to ChatGPT -- IIRC even the free tier of Claude points you to Sonnet 4.6 by default, which is magnitudes better than 5.3-instant which has been the default in ChatGPT.

Hence most users will immediately think Claude is smarter, even if their best models are on par.

	▲	simianwords 4 hours ago \| parent [-]
		then again I think the free sonnet 4.6 only allows ~5 requests a day but GPT allows more than 50

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while_true_ 3 hours ago | parent | prev [-]

Correct. I have the $20/month plan and I just checked, the default is 5.3-instant. I can manually switch it to Thinking is 5.5. I also have it set to auto-switch.

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BoxedEmpathy 2 hours ago | parent | prev | next [-]

Is this available on the API? I didn't see instant. I see chat?

	▲	timpera 2 hours ago \| parent [-]
		> GPT‑5.5 Instant is rolling out starting today to all ChatGPT users, replacing GPT‑5.3 Instant as the default model, and in the API as chat-latest.

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OutOfHere 2 hours ago | parent | prev | next [-]

Why can't they be more consistent about releasing the Insant and Thinking models at the same time for each version number? Why all this duplicative drama?

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tngranados 4 hours ago | parent | prev | next [-]

Looks like it gives more readable answer, hopefully it does, the regular free ChatGPT modal right now is insufferable.

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dude250711 4 hours ago | parent | prev [-]

Nice, something actually usable and at an affordable price.