Frontier AI models
for everything you
build .

Reasoning, code, voice, images, and video.
Trained on the world's largest supercluster.

For developers

One API.
Every modality.

Text, code, voice, images, and video — all through a single unified API. Start building in seconds.

1M+

API calls per day

<200ms

Median latency

5+

Model families

import os
from xai_sdk import Client
from xai_sdk.chat import user

client = Client(
    api_key=os.getenv("CAETHER_API_KEY")
)

chat = client.chat.create(model="caether-4.3")
chat.append(user("Explain quantum computing"))

response = chat.sample()
print(response.content)
300 M+
queries processed daily
150 K
0
mission to understand the universe

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Build on your own

Launch your AI-powered product with:


  • Access to all Caether models
  • Usage-based pricing
  • Automatically increasing rate limits
  • Comprehensive documentation and guides

Get extra support

Custom rate limits and hands-on support for your team.


  • Dedicated onboarding support
  • Custom rate limits
  • Billing via monthly invoices
  • Single sign-on and audit logging
  • Data residency options