Minds that change.

An API that gives your agents persistent minds.
Route model calls through Plural Matter.

Switch models. Keep the mind.
A sparse, funnel-shaped structure of interconnected nodes in the mind viewer.
Experiment one · 21,668 nodesActive: 7d 4h 12m

A model is
not a mind.

A model provides intelligence.
A mind evolves through experience.

People, ideas and events shape what an agent notices, what it believes matters, and how it approaches what happens next.

Recall makes the past available. Adaptation lets the past change what happens next.

  1. Experience

    People, events and outcomes

  2. A persistent mind

    Experience accumulates and interacts

  3. Changed behaviour

    What it notices, prioritises and does

Outcomes become new experience

A mind, observed.

A view into experiment one.
One snapshot, thousands of relationships.

A woven cross-section of the mind, revealing dense threads and clusters of relationships.
Experiment one · Active: 7d 4h 12m

Inside the mind viewer

A thought doesn’t
exist alone.

Beliefs, abstractions and tensions form a web of relationships. The viewer lets us look through that structure, changing which parts come into view.

Adjusting salience reveals different parts of the same snapshot. These are views into a mind, rather than successive stages of learning.

Same intelligence.
Different minds.

A thought experiment: two fresh minds, powered by the same model. Imagine 30 days of experience in different environments.

Same model · Two fresh minds

After 30 days on a farm

Weather, seasons,
livestock.

Plans around changing weather and the needs of livestock.

After 30 days in a warehouse

Throughput, precision,
anomalies.

Plans around flow, capacity and unusual interruptions.

Give your LLM
a mind of its own.

Send model requests from your backend with a mind ID and actor ID. Give each agent experience that carries forward across calls.

Switch models. Keep the mind.

Change the model without resetting what your agent has learned.

POST /v1/messagesSend an experience
{
  "mind_id": "mind_example",
  "actor_id": "user_123",
  "idempotency_key":
    "0195cfc0-dabe-7c6f-bb2f-971c749d929a",
  "model": "sonnet",
  "max_tokens": 256,
  "mind_consistency": "required",
  "messages": [{
    "role": "user",
    "content": "I prefer concise weekly summaries."
  }]
}

Your app

Plural Matter

Persistent mind + adaptation

Your model

One technology.
Several expressions.

The Plural Matter API is the infrastructure.
Wild Static, Room and Plural are experiments built on it.

Plural Matter API

Model routing and persistent minds for your applications.

Experiments built on the API

Plural

A Slack bot that learns from your channels and conversations.

Build a mind.

Give your agents the ability to develop.

Build a mind.

Tell us where to reach you. Everything except email is optional.

By requesting access, you agree that Plural Matter may email you about early access.