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OpenAI · Chips

Jalapeño's first numbers: OpenAI claims its chip gives more and faster at once

OpenAI published the first measurements of its own inference chip. They claim higher throughput and shorter waiting at the same time, which until now was treated as a trade. The numbers are theirs and were measured by them.

Source
OpenAI
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The event
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Responsible editor
Cvetelin Ivanov
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Announcing a chip is the easy part. The numbers come later and are usually more modest than the stage.

These came, and they are not modest.

Fact

The facts: on 25 August 2026 OpenAI published the first measurements of Jalapeño, its first custom inference chip. They claim higher throughput per kilowatt and shorter time to the next token at the same time, from one architecture. The measurements are shown on three open models: GPT-OSS 120B, DeepSeek R1 670B and Kimi K2.5 1T. All the numbers are OpenAI's, about OpenAI's own chip, and were measured by them.

Why this is not the usual boasting

Inference carries an old trade. Fill the machine with more simultaneous requests and you get more work out, but every single person waits longer. Optimise for the fast answer and the machine sits half empty.

Anyone who has served a model knows that compromise and picks a side. The claim here is that you do not have to pick.

We used AI to design the chip, and designed the chip so AI could program it.

The sentence above is theirs and it is more interesting than the benchmarks. The circle closes: models help build the hardware they will later run on, and the hardware is deliberately shaped so a model can handle programming it.

How I read it

As a claim, not a result. A vendor's numbers about a vendor's product are the start of a conversation, not the end. They become fact when someone outside runs the same models on the same hardware and gets the same thing.

But the direction is clear and it is not news only for OpenAI. The big players no longer buy compute, they build it, because the electricity bill decides who survives faster than the bill for cards does.

The visual is generated code-art, no third-party images.