GPT 5.5 Instant on API .. just via chat-latest? Pricing?

API
1

Per the title … accessing GPT 5.5 Instant via API, currently only by calling chat-latest?

And, is it just the same cost (but presumed to use fewer tokens) as regular 5.5?

2

You can check the current model/pricing details here:

And the general pricing page here:

3

“Instant” is not delineated here

4

I don’t think there is an API for GPT 5.5 Instant. It’s the new default model for ChatGPT.

5

There isn’t a separate gpt-5.5 instant pricing.

6

Hi @bsommerhalder,

yes, that is correct.

chat-latest currently points to the model used in ChatGPT as “Instant”.

Since the chat models do little to no reasoning, that is where most of the savings are currently coming from.

Link: chat-latest Model | OpenAI API

7

Got it, looks like my assumptions were correct. Cheers

8

I already linked that, should I remove it so there’s not duplicates in the same topic?

9

Sure, yeah. The link wasn’t really the helpful thing, just confirmation that there’s no specific pricing for “instant” and the only way to call it via the API is via chat-latest.

10

Just leave it. It’s still the correct link.

11

The only way that there could be fewer tokens is if the final answer had less text. There is no billed internal reasoning to be “smarter” or more efficient.

What is not the same cost is the same input and same output:

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