Snowflake Cortex

Access 25 Snowflake Cortex models through Mastra's model router. Authentication is handled automatically using the SNOWFLAKE_CORTEX_PAT environment variable. Configure SNOWFLAKE_ACCOUNT as well.

Learn more in the Snowflake Cortex documentation.

.env

SNOWFLAKE_ACCOUNT=your-value
SNOWFLAKE_CORTEX_PAT=your-api-key

src/mastra/agents/my-agent.ts

import { Agent } from "@mastra/core/agent";

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "snowflake-cortex/claude-fable-5"
});

// Generate a response
const response = await agent.generate("Hello!");

// Stream a response
const stream = await agent.stream("Tell me a story");
for await (const chunk of stream) {
  console.log(chunk);
}

note

Mastra uses the OpenAI-compatible /chat/completions endpoint. Some provider-specific features may not be available. Check the Snowflake Cortex documentation for details.

Models

25 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
snowflake-cortex/claude-fable-5	1.0M						—	—
snowflake-cortex/claude-haiku-4-5	200K						—	—
snowflake-cortex/claude-opus-4-5	200K						—	—
snowflake-cortex/claude-opus-4-6	1.0M						—	—
snowflake-cortex/claude-opus-4-7	1.0M						—	—
snowflake-cortex/claude-opus-4-8	1.0M						—	—
snowflake-cortex/claude-opus-5	1.0M						—	—
snowflake-cortex/claude-sonnet-4-5	200K						—	—
snowflake-cortex/claude-sonnet-4-6	1.0M						—	—
snowflake-cortex/claude-sonnet-5	1.0M						—	—
snowflake-cortex/deepseek-r1	128K						—	—
snowflake-cortex/gemini-3.1-pro	1.0M						—	—
snowflake-cortex/mistral-large2	262K						—	—
snowflake-cortex/openai-gpt-4.1	1.0M						—	—
snowflake-cortex/openai-gpt-5	400K						—	—
snowflake-cortex/openai-gpt-5-mini	272K						—	—
snowflake-cortex/openai-gpt-5-nano	400K						—	—
snowflake-cortex/openai-gpt-5.1	400K						—	—
snowflake-cortex/openai-gpt-5.2	400K						—	—
snowflake-cortex/openai-gpt-5.4	1.1M						—	—
snowflake-cortex/openai-gpt-5.5	1.1M						—	—
snowflake-cortex/openai-gpt-5.6-luna	1.1M						—	—
snowflake-cortex/openai-gpt-5.6-sol	1.1M						—	—
snowflake-cortex/openai-gpt-5.6-terra	1.1M						—	—
snowflake-cortex/snowflake-llama3.3-70b	128K						—	—

Model availability, capabilities, context windows, and pricing are sourced from models.dev and may change.

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://${SNOWFLAKE_ACCOUNT}.snowflakecomputing.com/api/v2/cortex/v1",
    id: "snowflake-cortex/claude-fable-5",
    apiKey: process.env.SNOWFLAKE_CORTEX_PAT,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic model selection

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "dynamic-agent",
  name: "Dynamic Agent",
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === "complex";
    return useAdvanced
      ? "snowflake-cortex/snowflake-llama3.3-70b"
      : "snowflake-cortex/claude-fable-5";
  }
});