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+---
+layout: integration
+name: OrcaRouter
+description: Use OrcaRouter's OpenAI-compatible API gateway for chat generation in Haystack.
+authors:
+    - name: deepset
+      socials:
+        github: deepset-ai
+        twitter: deepset_ai
+        linkedin: https://www.linkedin.com/company/deepset-ai/
+    - name: Jinhao Song
+      socials:
+        github: jinhaosong-source
+pypi: https://pypi.org/project/orcarouter-haystack
+repo: https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/orcarouter
+type: Model Provider
+report_issue: https://github.com/deepset-ai/haystack-core-integrations/issues
+logo: /logos/orcarouter.png
+version: Haystack 2.0
+toc: true
+---
+
+### **Table of Contents**
+- [Overview](#overview)
+- [Installation](#installation)
+- [Usage](#usage)
+- [License](#license)
+
+## Overview
+
+[`OrcaRouterChatGenerator`](https://docs.haystack.deepset.ai/reference/integrations-orcarouter) lets you call chat models through [OrcaRouter](https://www.orcarouter.ai), an OpenAI-compatible API gateway.
+
+OrcaRouter routes requests to provider-prefixed models from upstream providers such as OpenAI, Anthropic, Google Gemini, DeepSeek, xAI Grok, Alibaba Qwen, Moonshot Kimi, and MiniMax. Use the live [OrcaRouter model catalog](https://www.orcarouter.ai/models) or the `/v1/models` endpoint to see which models your account can access.
+
+This integration provides:
+
+- **OpenAI-compatible chat generation** through the OrcaRouter API at `https://api.orcarouter.ai/v1`.
+- **Provider-prefixed model IDs** such as `openai/gpt-4o-mini`, `google/gemini-2.5-flash`, and `deepseek/deepseek-chat`.
+- **Automatic routing** with `orcarouter/auto`, which lets OrcaRouter choose a live model for the request.
+- **Fallback chains and routing preferences** by forwarding OrcaRouter-specific options through `generation_kwargs`.
+- **Streaming, tool calling, and structured outputs** inherited from Haystack's `OpenAIChatGenerator`.
+
+To follow along with the examples below, create an OrcaRouter API key and set it as the `ORCAROUTER_API_KEY` environment variable.
+
+## Installation
+
+```bash
+pip install orcarouter-haystack
+```
+
+## Usage
+
+You can use `OrcaRouterChatGenerator` on its own, in a [pipeline](https://docs.haystack.deepset.ai/docs/pipelines), or with the [Agent component](https://docs.haystack.deepset.ai/docs/agent).
+
+### Basic Chat Generation
+
+```python
+import os
+
+from haystack.dataclasses import ChatMessage
+from haystack_integrations.components.generators.orcarouter import OrcaRouterChatGenerator
+
+os.environ["ORCAROUTER_API_KEY"] = "YOUR_ORCAROUTER_API_KEY"
+
+generator = OrcaRouterChatGenerator(model="openai/gpt-4o-mini")
+
+result = generator.run(
+    messages=[
+        ChatMessage.from_system("You are a concise assistant."),
+        ChatMessage.from_user("Briefly explain what OrcaRouter offers."),
+    ]
+)
+
+print(result["replies"][0].text)
+```
+
+### Automatic Routing and Fallbacks
+
+Use `orcarouter/auto` when you want OrcaRouter to choose a live model for the request:
+
+```python
+from haystack.dataclasses import ChatMessage
+from haystack_integrations.components.generators.orcarouter import OrcaRouterChatGenerator
+
+generator = OrcaRouterChatGenerator(model="orcarouter/auto")
+
+result = generator.run(
+    messages=[ChatMessage.from_user("Summarize retrieval augmented generation in two sentences.")]
+)
+```
+
+You can also pass OrcaRouter routing options through `generation_kwargs`. For example, this creates an explicit fallback chain:
+
+```python
+from haystack.dataclasses import ChatMessage
+from haystack_integrations.components.generators.orcarouter import OrcaRouterChatGenerator
+
+generator = OrcaRouterChatGenerator(
+    model="openai/gpt-4o-mini",
+    generation_kwargs={
+        "extra_body": {
+            "route": "fallback",
+            "models": [
+                "openai/gpt-4o-mini",
+                "anthropic/claude-haiku-4.5",
+                "google/gemini-2.5-flash",
+            ],
+        }
+    },
+)
+
+result = generator.run(messages=[ChatMessage.from_user("What is Haystack?")])
+```
+
+### Streaming
+
+Pass a streaming callback to receive chunks as the response is generated:
+
+```python
+from haystack.dataclasses import ChatMessage
+from haystack_integrations.components.generators.orcarouter import OrcaRouterChatGenerator
+
+
+def show(chunk):
+    print(chunk.content, end="", flush=True)
+
+
+generator = OrcaRouterChatGenerator(
+    model="openai/gpt-4o-mini",
+    streaming_callback=show,
+)
+
+generator.run(messages=[ChatMessage.from_user("Explain model routing in one paragraph.")])
+```
+
+### Tool Calling with an Agent
+
+Because `OrcaRouterChatGenerator` supports Haystack tools, you can use it as the chat generator for an Agent:
+
+```python
+from haystack.components.agents import Agent
+from haystack.dataclasses import ChatMessage
+from haystack.tools import Tool
+from haystack_integrations.components.generators.orcarouter import OrcaRouterChatGenerator
+
+
+def weather(city: str) -> str:
+    return f"The weather in {city} is sunny."
+
+
+weather_tool = Tool(
+    name="weather",
+    description="Useful for getting the weather in a specific city",
+    parameters={
+        "type": "object",
+        "properties": {"city": {"type": "string"}},
+        "required": ["city"],
+    },
+    function=weather,
+)
+
+agent = Agent(
+    chat_generator=OrcaRouterChatGenerator(model="openai/gpt-4o-mini"),
+    tools=[weather_tool],
+    system_prompt="You help users by calling the provided tools when they are relevant.",
+)
+
+result = agent.run(messages=[ChatMessage.from_user("What's the weather in Tokyo?")])
+
+print(result["last_message"].text)
+```
+
+## License
+
+`orcarouter-haystack` is distributed under the terms of the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) license.
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