# Migrate from AgentNetwork to `.network()`

As of `v0.20.0` for `@mastra/core`, the following changes apply.

### Upgrade from AI SDK v4 to v5

- Bump all your model provider packages by a major version.

> **Note:** This will ensure that they are all v5 models now.

### Memory is required

- Memory is now required for the agent network to function properly.

> **Note:** You must configure memory for the agent.

## Migration paths

If you were using the `AgentNetwork` primitive, you can replace the `AgentNetwork` with `Agent`.

Before:

```typescript
import { AgentNetwork } from "@mastra/core/network";

const agent = new AgentNetwork({
  name: "agent-network",
  agents: [agent1, agent2],
  tools: { tool1, tool2 },
  model: "openai/gpt-5.1",
  instructions:
    "You are a network agent that can help users with a variety of tasks.",
});

await agent.stream("Find me the weather in Tokyo.");
```

After:

```typescript
import { Agent } from "@mastra/core/agent";
import { Memory } from "@mastra/memory";

const memory = new Memory();

const agent = new Agent({
  id: "agent-network",
  name: "agent-network",
  agents: { agent1, agent2 },
  tools: { tool1, tool2 },
  model: "openai/gpt-5.1",
  instructions:
    "You are a network agent that can help users with a variety of tasks.",
  memory,
});

await agent.network("Find me the weather in Tokyo.");
```

If you were using the `NewAgentNetwork` primitive, you can replace the `NewAgentNetwork` with `Agent`.

Before:

```typescript
import { NewAgentNetwork } from "@mastra/core/network/vnext";

const agent = new NewAgentNetwork({
  id: "agent-network",
  name: "agent-network",
  agents: { agent1, agent2 },
  workflows: { workflow1 },
  tools: { tool1, tool2 },
  model: "openai/gpt-5.1",
  instructions:
    "You are a network agent that can help users with a variety of tasks.",
});

await agent.loop("Find me the weather in Tokyo.");
```

After:

```typescript
import { Agent } from "@mastra/core/agent";
import { Memory } from "@mastra/memory";

const memory = new Memory();

const agent = new Agent({
  name: "agent-network",
  agents: { agent1, agent2 },
  workflows: { workflow1 },
  tools: { tool1, tool2 },
  model: "openai/gpt-5.1",
  instructions:
    "You are a network agent that can help users with a variety of tasks.",
  memory,
});

await agent.network("Find me the weather in Tokyo.");
```