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* feat(fireworks_ai): sync chat completions endpoint with full API surface Add 23 missing request parameters to get_supported_openai_params(): seed, top_logprobs, min_p, typical_p, repetition_penalty, mirostat_target, mirostat_lr, logit_bias, echo, echo_last, ignore_eos, prompt_cache_key, prompt_cache_isolation_key, raw_output, perf_metrics_in_response, return_token_ids, safe_tokenization, service_tier, metadata, speculation, prediction, stream_options, sampling_mask. Also add reasoning_history gated on supports_reasoning. Fix prompt_truncate_length to prompt_truncate_len to match the actual API parameter name. The old name was never in DEFAULT_CHAT_COMPLETION_PARAM_VALUES, so it always went to extra_body and was rejected by Fireworks; it never actually worked. Normalize reasoning_effort boolean values to strings: True becomes "medium", False becomes "none". The Fireworks OpenAPI schema documents these as accepted types, but the server rejects non-string values with HTTP 400 in practice. Integers pass through as-is since the server is expected to validate them. Auto-inject stream_options.include_usage=true when stream=true and the user has not explicitly set stream_options. Without this, Fireworks returns null usage in all streaming chunks, which is inconsistent with the non-streaming behavior where usage is always present. If the user explicitly sets include_usage=false, it is preserved. Capture Fireworks-specific response fields in transform_response(): perf_metrics, prompt_token_ids, raw_output, and token_ids are now extracted from the response and stored in response._hidden_params (fireworks_perf_metrics, fireworks_prompt_token_ids, fireworks_raw_outputs, fireworks_token_ids) so they are accessible to logging, the proxy, and downstream consumers when the corresponding request parameters are enabled. Remove deprecated document inlining logic. Document inlining was deprecated on 2025-06-30 (https://docs.fireworks.ai/updates/changelog#-document-inlining-deprecation). This removes _add_transform_inline_image_block(), the file-to-image_url migration in _transform_messages_helper(), and the disable_add_transform_inline_image_block lookup. Current models that support image input do so natively as VLMs. cache_control, provider_specific_fields, and thinking_blocks stripping is retained. Update get_provider_info() to look up supports_vision and supports_pdf_input from the model cost map instead of hardcoding both to True (which was based on the now-deprecated document inlining). supports_prompt_caching remains True. API docs: https://docs.fireworks.ai/api-reference/post-chatcompletions Reasoning guide: https://docs.fireworks.ai/guides/reasoning Prompt caching: https://docs.fireworks.ai/guides/prompt-caching * fix fireworks chat api surface gaps * Scope Fireworks thinking param to reasoning models * style: fix black formatting * fix(test): update minimax-m3 expected_vision to True * test: cover non-dict content branch in transform_messages_helper * fix(fireworks_ai): remove metadata from supported params to prevent internal metadata disclosure * test(fireworks_ai): replace stale document-inlining capability test The CircleCI-only litellm_utils_tests suite still asserted the old behavior where document inlining made every Fireworks model report supports_pdf_input and supports_vision as True. That premise was removed in this change, so the test now reflects cost-map-driven capabilities: unmapped models no longer advertise vision/PDF support while mapped VLMs like minimax-m3 still do. * test(fireworks_ai): add end-to-end regression for native OpenAI params The existing coverage for the newly supported OpenAI-native params asserted list membership in get_supported_openai_params or called map_openai_params with a hand-built dict, both of which bypass the get_optional_params gate (DEFAULT_CHAT_COMPLETION_PARAM_VALUES). That gate is what previously raised UnsupportedParamsError for seed, top_logprobs, logit_bias, prompt_cache_key, service_tier and prediction when drop_params=False. Assert the full path so a revert of the supported-params additions fails the test instead of passing a shallow membership check. * test(fireworks_ai): fix test isolation in vision/inlining tests Use monkeypatch in test_fireworks_ai_vision_capability_from_cost_map so the LITELLM_LOCAL_MODEL_COST_MAP env var and litellm.model_cost are restored after the test instead of leaking global state into the rest of the process. Switch the document-inlining integration tests off deepseek-v3p1, whose supports_vision is null in the cost map, onto minimax-m3 which is explicitly supports_vision:true. The pass-through assertions no longer depend on a model incidentally not being marked non-vision. * fix(fireworks_ai): gate image rejection on exact vision capability The image_url rejection read supports_vision via _get_model_cost_capability, which falls back to hyphen-boundary substring matching when no exact cost-map entry exists. A custom or fine-tuned model id that merely contains a known non-vision model's short name (e.g. an id ending in -glm-5p2) inherited that entry's supports_vision:false and hard-failed valid image_url blocks on a vision-capable deployment. Split the exact candidate-key lookup into _get_model_cost_capability_exact and use it for the hard rejection so a fuzzy match can never block images; the substring fallback stays a soft signal for capability reporting. Also rewrites the fallback as a comprehension + max instead of an accumulating loop. * feat(fireworks_ai): surface response fields on streaming responses The Fireworks-specific response fields (perf_metrics, prompt_token_ids, per-choice raw_output and token_ids) were only captured into _hidden_params in transform_response, which runs for non-streaming completions; streaming chat went through the default OpenAI chunk handler and dropped them. Add a FireworksAIChatCompletionStreamingHandler that the provider now returns from get_model_response_iterator. It reuses one extraction helper with transform_response and attaches the fields to each streamed chunk's provider_specific_fields, which is the channel litellm preserves when it rebuilds streamed chunks (per-chunk _hidden_params is not carried through). Per-choice token_ids/raw_output ride the content chunks; response-level perf_metrics/prompt_token_ids ride the final usage chunk. Covered by an end-to-end streaming test through litellm.completion(stream=True). --------- Co-authored-by: Ahmad Shahzad <ahmad@shahzad.dev> Co-authored-by: Graham Neubig <398875+neubig@users.noreply.github.com> |
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🚅 LiteLLM
LiteLLM AI Gateway
Open Source AI Gateway for 100+ LLMs. Self-hosted. Enterprise-ready. Call any LLM in OpenAI format.
LiteLLM Proxy Server (AI Gateway) | Hosted Proxy | Enterprise Tier | Website
What is LiteLLM
LiteLLM is an open source AI Gateway that gives you a single, unified interface to call 100+ LLM providers — OpenAI, Anthropic, Gemini, Bedrock, Azure, and more — using the OpenAI format.
Use it as a Python SDK for direct library integration, or deploy the AI Gateway (Proxy Server) as a centralized service for your team or organization.
Jump to LiteLLM Proxy (LLM Gateway) Docs
Jump to Supported LLM Providers
Why LiteLLM
Managing LLM calls across providers gets complicated fast — different SDKs, auth patterns, request formats, and error types for every model. LiteLLM removes that friction:
- Unified API — one interface for 100+ LLMs, no provider-specific SDK juggling
- Drop-in OpenAI compatibility — swap providers without rewriting your code
- Production-ready gateway — virtual keys, spend tracking, guardrails, load balancing, and an admin dashboard out of the box
- 8ms P95 latency at 1k RPS (benchmarks)
OSS Adopters
Netflix |
Features
LLMs - Call 100+ LLMs (Python SDK + AI Gateway)
All Supported Endpoints - /chat/completions, /responses, /embeddings, /images, /audio, /batches, /rerank, /a2a, /messages and more.
Python SDK
uv add litellm
from litellm import completion
import os
os.environ["OPENAI_API_KEY"] = "your-openai-key"
os.environ["ANTHROPIC_API_KEY"] = "your-anthropic-key"
# OpenAI
response = completion(model="openai/gpt-4o", messages=[{"role": "user", "content": "Hello!"}])
# Anthropic
response = completion(model="anthropic/claude-sonnet-4-20250514", messages=[{"role": "user", "content": "Hello!"}])
AI Gateway (Proxy Server)
Getting Started - E2E Tutorial - Setup virtual keys, make your first request
uv tool install 'litellm[proxy]'
litellm --model gpt-4o
import openai
client = openai.OpenAI(api_key="anything", base_url="http://0.0.0.0:4000")
response = client.chat.completions.create(
model="gpt-4o",
messages=[{"role": "user", "content": "Hello!"}]
)
Agents - Invoke A2A Agents (Python SDK + AI Gateway)
Supported Providers - LangGraph, Vertex AI Agent Engine, Azure AI Foundry, Bedrock AgentCore, Pydantic AI
Python SDK - A2A Protocol
from litellm.a2a_protocol import A2AClient
from a2a.types import SendMessageRequest, MessageSendParams
from uuid import uuid4
client = A2AClient(base_url="http://localhost:10001")
request = SendMessageRequest(
id=str(uuid4()),
params=MessageSendParams(
message={
"role": "user",
"parts": [{"kind": "text", "text": "Hello!"}],
"messageId": uuid4().hex,
}
)
)
response = await client.send_message(request)
AI Gateway (Proxy Server)
Step 1. Add your Agent to the AI Gateway
Step 2. Call Agent via A2A SDK
from a2a.client import A2ACardResolver, A2AClient
from a2a.types import MessageSendParams, SendMessageRequest
from uuid import uuid4
import httpx
base_url = "http://localhost:4000/a2a/my-agent" # LiteLLM proxy + agent name
headers = {"Authorization": "Bearer sk-1234"} # LiteLLM Virtual Key
async with httpx.AsyncClient(headers=headers) as httpx_client:
resolver = A2ACardResolver(httpx_client=httpx_client, base_url=base_url)
agent_card = await resolver.get_agent_card()
client = A2AClient(httpx_client=httpx_client, agent_card=agent_card)
request = SendMessageRequest(
id=str(uuid4()),
params=MessageSendParams(
message={
"role": "user",
"parts": [{"kind": "text", "text": "Hello!"}],
"messageId": uuid4().hex,
}
)
)
response = await client.send_message(request)
MCP Tools - Connect MCP servers to any LLM (Python SDK + AI Gateway)
Python SDK - MCP Bridge
from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client
from litellm import experimental_mcp_client
import litellm
server_params = StdioServerParameters(command="python", args=["mcp_server.py"])
async with stdio_client(server_params) as (read, write):
async with ClientSession(read, write) as session:
await session.initialize()
# Load MCP tools in OpenAI format
tools = await experimental_mcp_client.load_mcp_tools(session=session, format="openai")
# Use with any LiteLLM model
response = await litellm.acompletion(
model="gpt-4o",
messages=[{"role": "user", "content": "What's 3 + 5?"}],
tools=tools
)
AI Gateway - MCP Gateway
Step 1. Add your MCP Server to the AI Gateway
Step 2. Call MCP tools via /chat/completions
curl -X POST 'http://0.0.0.0:4000/v1/chat/completions' \
-H 'Authorization: Bearer sk-1234' \
-H 'Content-Type: application/json' \
-d '{
"model": "gpt-4o",
"messages": [{"role": "user", "content": "Summarize the latest open PR"}],
"tools": [{
"type": "mcp",
"server_url": "litellm_proxy/mcp/github",
"server_label": "github_mcp",
"require_approval": "never"
}]
}'
Use with Cursor IDE
{
"mcpServers": {
"LiteLLM": {
"url": "http://localhost:4000/mcp/",
"headers": {
"x-litellm-api-key": "Bearer sk-1234"
}
}
}
}
Supported Providers (Website Supported Models | Docs)
Get Started
You can use LiteLLM through either the Proxy Server or Python SDK. Both give you a unified interface to access multiple LLMs (100+ LLMs). Choose the option that best fits your needs:
| LiteLLM AI Gateway | LiteLLM Python SDK | |
|---|---|---|
| Use Case | Central service (LLM Gateway) to access multiple LLMs | Use LiteLLM directly in your Python code |
| Who Uses It? | Gen AI Enablement / ML Platform Teams | Developers building LLM projects |
| Key Features | Centralized API gateway with authentication and authorization, multi-tenant cost tracking and spend management per project/user, per-project customization (logging, guardrails, caching), virtual keys for secure access control, admin dashboard UI for monitoring and management | Direct Python library integration in your codebase, Router with retry/fallback logic across multiple deployments (e.g. Azure/OpenAI) - Router, application-level load balancing and cost tracking, exception handling with OpenAI-compatible errors, observability callbacks (Lunary, MLflow, Langfuse, etc.) |
Stable Release: Use docker images with the -stable tag. These have undergone 12 hour load tests, before being published. More information about the release cycle here
Support for more providers. Missing a provider or LLM Platform, raise a feature request.
Run in Developer Mode
Services
- Setup .env file in root
- Run dependent services
docker-compose up db prometheus
Backend
- (In root) create virtual environment
python -m venv .venv - Activate virtual environment
source .venv/bin/activate - Install dependencies
uv sync --all-extras --group proxy-dev uv run prisma generateprisma generate- Start proxy backend
python litellm/proxy/proxy_cli.py
Frontend
- Navigate to
ui/litellm-dashboard - Install dependencies
npm install - Run
npm run devto start the dashboard
Verify Docker Image Signatures
All LiteLLM Docker images published to GHCR are signed with cosign. Every release is signed with the same key introduced in commit 0112e53.
Verify using the pinned commit hash (recommended):
A commit hash is cryptographically immutable, so this is the strongest way to ensure you are using the original signing key:
cosign verify \
--key https://raw.githubusercontent.com/BerriAI/litellm/0112e53046018d726492c814b3644b7d376029d0/cosign.pub \
ghcr.io/berriai/litellm:<release-tag>
Verify using a release tag (convenience):
Tags are protected in this repository and resolve to the same key. This option is easier to read but relies on tag protection rules:
cosign verify \
--key https://raw.githubusercontent.com/BerriAI/litellm/<release-tag>/cosign.pub \
ghcr.io/berriai/litellm:<release-tag>
Replace <release-tag> with the version you are deploying (e.g. v1.83.0-stable).
Enterprise
For companies that need better security, user management and professional support
Get an Enterprise License Talk to founders
This covers:
- ✅ Features under the LiteLLM Commercial License:
- ✅ Feature Prioritization
- ✅ Custom Integrations
- ✅ Professional Support - Dedicated discord + slack
- ✅ Custom SLAs
- ✅ Secure access with Single Sign-On
Contributing
We welcome contributions to LiteLLM! Whether you're fixing bugs, adding features, or improving documentation, we appreciate your help.
Quick Start for Contributors
This requires uv to be installed.
git clone https://github.com/BerriAI/litellm.git
cd litellm
make install-dev # Install development dependencies
make format # Format your code
make lint # Run all linting checks
make test-unit # Run unit tests
make format-check # Check formatting only
For detailed contributing guidelines, see CONTRIBUTING.md.
📖 Contributing to documentation? The LiteLLM docs have moved to a separate repository: BerriAI/litellm-docs. Please open doc PRs there. Docs are served at docs.litellm.ai.
Code Quality / Linting
LiteLLM follows the Google Python Style Guide.
Our automated checks include:
- Black for code formatting
- Ruff for linting and code quality
- MyPy for type checking
- Circular import detection
- Import safety checks
All these checks must pass before your PR can be merged.
Support / talk with founders
- Schedule Demo 👋
- Community Discord 💭
- Community Slack 💭
- Our emails ✉️ ishaan@berri.ai / krrish@berri.ai