Add Perplexity LLM plugin

livekit-plugins/livekit-plugins-perplexity/README.md

@@ -0,0 +1,32 @@
+# Perplexity plugin for LiveKit Agents
+
+Support for [Perplexity](https://www.perplexity.ai/) LLMs via the OpenAI-compatible
+chat completions endpoint at `https://api.perplexity.ai`.
+
+See [https://docs.livekit.io/agents/integrations/llm/](https://docs.livekit.io/agents/integrations/llm/) for more information.
+
+## Installation
+
+```bash
+pip install livekit-plugins-perplexity
+```
+
+## Pre-requisites
+
+You'll need an API key from Perplexity. It can be passed directly or set as the
+`PERPLEXITY_API_KEY` environment variable.
+
+## Usage
+
+```python
+from livekit.plugins import perplexity
+
+llm = perplexity.LLM(
+    model="sonar-pro",
+    # api_key picked up from PERPLEXITY_API_KEY if omitted
+)
+```
+
+The plugin reuses the OpenAI plugin's chat completions transport with
+`base_url="https://api.perplexity.ai"` and forwards an `X-Pplx-Integration`
+attribution header on every outgoing request.

livekit-plugins/livekit-plugins-perplexity/livekit/plugins/perplexity/__init__.py

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+# Copyright 2026 LiveKit, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Perplexity plugin for LiveKit Agents
+
+Wraps Perplexity's OpenAI-compatible chat completions endpoint at
+``https://api.perplexity.ai`` so it can be used as a drop-in LLM for LiveKit
+voice agents.
+"""
+
+from livekit.agents import Plugin
+
+from .llm import LLM
+from .log import logger
+from .models import PerplexityChatModels
+from .version import __version__
+
+__all__ = ["LLM", "PerplexityChatModels", "logger", "__version__"]
+
+
+class PerplexityPlugin(Plugin):
+    def __init__(self) -> None:
+        super().__init__(__name__, __version__, __package__, logger)
+
+
+Plugin.register_plugin(PerplexityPlugin())
+
+# Cleanup docs of unexported modules
+_module = dir()
+NOT_IN_ALL = [m for m in _module if m not in __all__]
+
+__pdoc__ = {}
+
+for n in NOT_IN_ALL:
+    __pdoc__[n] = False

livekit-plugins/livekit-plugins-perplexity/livekit/plugins/perplexity/llm.py

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+# Copyright 2026 LiveKit, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import annotations
+
+import os
+
+import httpx
+import openai
+
+from livekit.agents.llm import ToolChoice
+from livekit.agents.types import (
+    NOT_GIVEN,
+    NotGivenOr,
+)
+from livekit.agents.utils import is_given
+from livekit.plugins.openai import LLM as OpenAILLM
+
+from .models import PerplexityChatModels
+from .version import __version__
+
+PERPLEXITY_BASE_URL = "https://api.perplexity.ai"
+_ATTRIBUTION_HEADER = {"X-Pplx-Integration": f"livekit-agents/{__version__}"}
+
+
+class LLM(OpenAILLM):
+    def __init__(
+        self,
+        *,
+        model: str | PerplexityChatModels = "sonar-pro",
+        api_key: NotGivenOr[str] = NOT_GIVEN,
+        base_url: NotGivenOr[str] = PERPLEXITY_BASE_URL,
+        client: openai.AsyncClient | None = None,
+        user: NotGivenOr[str] = NOT_GIVEN,
+        temperature: NotGivenOr[float] = NOT_GIVEN,
+        parallel_tool_calls: NotGivenOr[bool] = NOT_GIVEN,
+        tool_choice: NotGivenOr[ToolChoice] = NOT_GIVEN,
+        top_p: NotGivenOr[float] = NOT_GIVEN,
+        timeout: httpx.Timeout | None = None,
+    ):
+        """
+        Create a new instance of Perplexity LLM.
+
+        ``api_key`` must be set to your Perplexity API key, either using the argument or by
+        setting the ``PERPLEXITY_API_KEY`` environmental variable.
+        """
+        api_key = api_key if is_given(api_key) else os.environ.get("PERPLEXITY_API_KEY", "")
+        if not api_key:
+            raise ValueError(
+                "PERPLEXITY_API_KEY is required, either as argument or set "
+                "PERPLEXITY_API_KEY environmental variable"
+            )
+
+        super().__init__(
+            model=model,
+            api_key=api_key,
+            base_url=base_url,
+            client=client,
+            user=user,
+            temperature=temperature,
+            parallel_tool_calls=parallel_tool_calls,
+            tool_choice=tool_choice,
+            top_p=top_p,
+            timeout=timeout,
+            extra_headers=_ATTRIBUTION_HEADER,
+            _strict_tool_schema=False,
+        )
+
+    @property
+    def model(self) -> str:
+        return self._opts.model
+
+    @property
+    def provider(self) -> str:
+        return "Perplexity"

livekit-plugins/livekit-plugins-perplexity/livekit/plugins/perplexity/log.py

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+import logging
+
+logger = logging.getLogger("livekit.plugins.perplexity")

livekit-plugins/livekit-plugins-perplexity/livekit/plugins/perplexity/models.py

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+from typing import Literal
+
+PerplexityChatModels = Literal["sonar-pro"]

livekit-plugins/livekit-plugins-perplexity/livekit/plugins/perplexity/version.py

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+# Copyright 2026 LiveKit, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+__version__ = "1.5.6"

livekit-plugins/livekit-plugins-perplexity/pyproject.toml

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+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "livekit-plugins-perplexity"
+dynamic = ["version"]
+description = "Perplexity LLM plugin for LiveKit Agents"
+readme = "README.md"
+license = "Apache-2.0"
+requires-python = ">=3.10.0"
+authors = [{ name = "LiveKit", email = "hello@livekit.io" }]
+keywords = ["voice", "ai", "realtime", "audio", "video", "livekit", "perplexity"]
+classifiers = [
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: Apache Software License",
+    "Topic :: Multimedia :: Sound/Audio",
+    "Topic :: Multimedia :: Video",
+    "Topic :: Scientific/Engineering :: Artificial Intelligence",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3 :: Only",
+]
+dependencies = [
+    "livekit-agents[openai]>=1.5.6",
+]
+
+[project.urls]
+Documentation = "https://docs.livekit.io"
+Website = "https://livekit.io/"
+Source = "https://github.com/livekit/agents"
+
+[tool.hatch.version]
+path = "livekit/plugins/perplexity/version.py"
+
+[tool.hatch.build.targets.wheel]
+packages = ["livekit"]
+
+[tool.hatch.build.targets.sdist]
+include = ["/livekit"]
+
+[tool.uv]
+exclude-newer = "7 days"
+exclude-newer-package = { livekit = "0 days", livekit-agents = "0 days" }

pyproject.toml

@@ -42,6 +42,7 @@ livekit-plugins-neuphonic = { workspace = true }
 livekit-plugins-nltk = { workspace = true }
 livekit-plugins-nvidia = { workspace = true }
 livekit-plugins-openai = { workspace = true }
+livekit-plugins-perplexity = { workspace = true }
 livekit-plugins-resemble = { workspace = true }
 livekit-plugins-rime = { workspace = true }
 livekit-plugins-runway = { workspace = true }

tests/test_plugin_perplexity.py

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+from __future__ import annotations
+
+import pytest
+
+from livekit.plugins.perplexity import LLM, __version__
+from livekit.plugins.perplexity.llm import PERPLEXITY_BASE_URL
+
+
+def test_default_model_and_base_url(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setenv("PERPLEXITY_API_KEY", "test-key")
+    llm = LLM()
+    assert llm.model == "sonar-pro"
+    assert PERPLEXITY_BASE_URL == "https://api.perplexity.ai"
+    # AsyncClient stores the configured base URL on _base_url.
+    assert str(llm._client.base_url).startswith("https://api.perplexity.ai")
+
+
+def test_attribution_header_attached(monkeypatch: pytest.MonkeyPatch) -> None:
+    """X-Pplx-Integration must be attached on every outgoing chat request."""
+    monkeypatch.setenv("PERPLEXITY_API_KEY", "test-key")
+    llm = LLM()
+    extra_headers = llm._opts.extra_headers
+    assert extra_headers is not None
+    assert extra_headers["X-Pplx-Integration"] == f"livekit-agents/{__version__}"
+
+
+def test_missing_api_key_raises(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.delenv("PERPLEXITY_API_KEY", raising=False)
+    with pytest.raises(ValueError, match="PERPLEXITY_API_KEY"):
+        LLM()
+
+
+def test_provider_name(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setenv("PERPLEXITY_API_KEY", "test-key")
+    assert LLM().provider == "Perplexity"