Requesty

Access 47 Requesty models through Mastra's model router. Authentication is handled automatically using the REQUESTY_API_KEY environment variable.

Learn more in the Requesty documentation.

.env

REQUESTY_API_KEY=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: "requesty/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);
}

info

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

Models

47 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
requesty/claude-fable-5	1.0M						$10	$50
requesty/claude-haiku-4-5	200K						$1	$5
requesty/claude-haiku-4-5@eu	200K						$1	$6
requesty/claude-opus-4-1	200K						$15	$75
requesty/claude-opus-4-5	200K						$5	$25
requesty/claude-opus-4-5@eu	200K						$6	$28
requesty/claude-opus-4-6	1.0M						$5	$25
requesty/claude-opus-4-6@eu	1.0M						$6	$28
requesty/claude-opus-4-7	1.0M						$5	$25
requesty/claude-opus-4-7@eu	1.0M						$6	$28
requesty/claude-opus-4-8	1.0M						$5	$25
requesty/claude-opus-4-8@eu	1.0M						$6	$28
requesty/claude-opus-5	1.0M						$5	$25
requesty/claude-opus-5@eu	1.0M						$6	$28
requesty/claude-sonnet-4-5	1.0M						$3	$15
requesty/claude-sonnet-4-5@eu	1.0M						$3	$17
requesty/claude-sonnet-4-6	1.0M						$3	$15
requesty/claude-sonnet-4-6@eu	1.0M						$3	$17
requesty/claude-sonnet-4@eu	1.0M						$3	$15
requesty/claude-sonnet-5	1.0M						$2	$10
requesty/claude-sonnet-5@eu	1.0M						$2	$11
requesty/deepseek-v4-flash-0731	1.0M						$0.14	$0.28
requesty/deepseek-v4-flash-0731@eu	1.0M						$0.14	$0.28
requesty/gemini-2.5-flash@eu	1.0M						$0.30	$3
requesty/gemini-3.1-flash-lite@eu	1.0M						$0.25	$2
requesty/gemini-3.5-flash-lite	1.0M						$0.30	$3
requesty/gemini-3.5-flash@eu	1.0M						$2	$9
requesty/gemini-3.6-flash	1.0M						$2	$7
requesty/glm-5.2	1.0M						$1	$4
requesty/glm-5.2@eu	1.0M						$1	$4
requesty/gpt-4.1-mini@eu	1.0M						$0.44	$2
requesty/gpt-4.1-nano@eu	1.0M						$0.11	$0.44
requesty/gpt-4.1@eu	1.0M						$2	$9
requesty/gpt-4o-mini@eu	128K						$0.17	$0.66
requesty/gpt-5-mini@eu	200K						$0.28	$2
requesty/gpt-5-nano@eu	200K						$0.06	$0.44
requesty/gpt-5.1@eu	400K						$1	$11
requesty/gpt-5.4@eu	1.1M						$3	$15
requesty/gpt-5.5@eu	1.1M						$5	$30
requesty/gpt-5.6-luna@eu	1.1M						$1	$7
requesty/gpt-5.6-sol@eu	1.1M						$6	$33
requesty/gpt-5.6-terra@eu	1.1M						$3	$17
requesty/gpt-5@eu	400K						$1	$11
requesty/grok-4.5	500K						$2	$6
requesty/kimi-k3	1.0M						$2	$11
requesty/kimi-k3@eu	1.0M						$2	$11
requesty/o4-mini@eu	200K						$1	$5

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://router.requesty.ai/v1",
    id: "requesty/claude-fable-5",
    apiKey: process.env.REQUESTY_API_KEY,
    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
      ? "requesty/o4-mini@eu"
      : "requesty/claude-fable-5";
  }
});