New

Halo 2 is out

Read the release

Models that reason,
build, and imagine.

One family of models for language, code, speech and images — trained and served on compute we design ourselves.

  • Why do cats knead blankets?

  • It’s a kitten habit that stuck — kneading helped them nurse, and now it signals they feel safe.

  • Explain compound interest in one line

  • You earn interest on your interest, so growth speeds up the longer you wait.

  • Name ideas for a small bakery?

  • Rise & Rye, Crumb Theory, or Morning Loaf — short, warm, easy to remember.

  • How far away is Mars right now?

  • Somewhere between 55 and 400 million km, depending on where both planets sit in orbit.

  • Make this email sound friendlier

  • Sure — I softened the opening and swapped “per my last note” for “just circling back.”

  • What’s the tallest tree on Earth?

  • A coast redwood nicknamed Hyperion, roughly 116 meters tall.

Assist

Explore

forge — ~/studio-app

  • › Add rate limits to the upload route

  • planning…

  • open api/upload.ts

  • search “quota” · 3 hits

  • edit api/upload.ts +18 −2

  • run npm test

  • ✓ 24 passing · 1.9s

  • › Move image resizing to a queue

  • thinking… 3.1s

  • open workers/resize.ts

  • create queue/jobs.ts

  • edit api/images.ts +42 −17

  • agent review changes · done

  • ✓ build passed

  • › Write docs for the new endpoint

  • open docs/api.md

  • edit docs/api.md +64

  • ✓ ready for review

Forge

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My order showed up cracked. Can I get a refund?

Relay is working

Relay

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Studio

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Speak

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For developers

Build once.
Ship everywhere.

A single API for text, code, speech and images. Swap models with one parameter and scale without rewriting a line.

Create a key

API reference

3B+

tokens served daily

180ms

median first token

6

model families

Copy

from vantir import Vantir

client = Vantir()

reply = client.responses.create(

model=“halo-2”,

input=“Draft a launch checklist for our iOS app”,

)

# streamed, typed, and billed per token

print(reply.output_text)

Python

TypeScript

Go

cURL

12B

requests answered last month

250K

accelerators in our fleet

41

days from bare site to first training run

41

days from bare site to first training run

Latest news

Halo 2

Product

·

Introducing Halo 2

Relay in the clinic

Customers

·

How a clinic network cut triage time in half with Relay

Speak 3

Product

·

Speak 3: faster, warmer, and fluent in 40 languages

Memory in Forge

Engineering

·

Long-term memory comes to Forge

Pick your starting point

Build it yourself

Everything you need to ship a product on Vantir today.

Every Vantir model, one key

Pay only for the tokens you use

Rate limits that grow with you

Guides, SDKs and sample apps

Start building

Work with our team

Dedicated help and custom terms for larger rollouts.

Guided onboarding with an engineer

Custom throughput and limits

Monthly invoicing

SSO, audit logs and data residency

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