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Agent builders

Ampersand

4.2/ 5

Collaborator model from humans& for group apps, available through an Agents API.

Also known as Ampersand v0.1, ampersand-v0.1

What it does

Ampersand v0.1 is a collaborator model from humans&, released October 20, 2026. The announcement says it is trained to help people pursue individual and shared goals, and that an API key is available the same day with no waitlist. The model card says it is built on GLM 5.3, with about 744 billion total parameters and about 40 billion active, a 1,048,576 token context, and text in and out. A session keeps the conversation history, and the docs describe tools to send a message or stay quiet. The pricing page lists public token rates for ampersand-v0.1.

Who is Ampersand for?

Developers building apps where a model works with a group of people over time.

Tags

  • collaborator
  • api
  • groups

Key facts

Category
Agent builders
Pricing model
Paid
Official site
ampersand.humansand.ai/
VibeStack score
4.2 / 5
Last reviewed

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