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Point an Agent at any provider by setting its llm parameter — PraisonAI routes to OpenAI, Anthropic, Gemini, Groq, Cohere, or a local Ollama model. 
from praisonaiagents import Agent

agent = Agent(instructions="You are a helpful assistant", llm="gpt-4o-mini")
agent.start("Why is the sky blue?")
Not sure which model to use? Run praisonai models list to browse all available models, or see the Model Catalogue CLI for full details on browsing, describing, and validating models.

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Code

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Set model by 3 ways

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1. OpenAI Compatible Endpoints

By Default it uses OPENAI_BASE_URL https://api.openai.com/v1
Example Groq Implementation: 
export OPENAI_API_KEY="${GROQ_API_KEY:?Set GROQ_API_KEY in your shell}"
export OPENAI_BASE_URL=https://api.groq.com/openai/v1

from praisonaiagents import Agent

agent = Agent(
    instructions="You are a helpful assistant",
    llm="llama-3.1-8b-instant",
)

agent.start("Why sky is Blue?")

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2. Litellm Compatible model names (eg: gemini/gemini-1.5-flash-8b)

pip install "praisonaiagents[llm]"

from praisonaiagents import Agent

agent = Agent(
    instructions="You are a helpful assistant",
    llm="gemini/gemini-1.5-flash-8b",
    reflection=True,
    
)

agent.start("Why sky is Blue?")

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3. Litellm Compatible Configuration

pip install "praisonaiagents[llm]"

from praisonaiagents import Agent

llm_config = {
    "model": "gemini/gemini-1.5-flash-latest",  # Model name without provider prefix
    
    # Core settings
    "temperature": 0.7,                # Controls randomness (like temperature)
    "timeout": 30,                 # Timeout in seconds
    "top_p": 0.9,                    # Nucleus sampling parameter
    "max_tokens": 1000,               # Max tokens in response
    
    # Advanced parameters
    "presence_penalty": 0.1,         # Penalize repetition of topics (-2.0 to 2.0)
    "frequency_penalty": 0.1,        # Penalize token repetition (-2.0 to 2.0)
    
    # API settings (optional)
    "api_key": None,                 # Your API key (or use environment variable)
    "base_url": None,                # Custom API endpoint if needed
    
    # Response formatting
    "response_format": {             # Force specific response format
        "type": "text"               # Options: "text", "json_object"
    },
    
    # Additional controls
    "seed": 42,                      # For reproducible responses
    "stop_phrases": ["##", "END"],   # Custom stop sequences
}

agent = Agent(
    instructions="You are a helpful Assistant."
    llm=llm_config
)
agent.start()

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Advanced Configuration (Litellm Support)

This uses Litellm
1

Install Package

Install required packages:
pip install "praisonaiagents[llm]"
2

Setup Environment

Configure environment:
export GOOGLE_API_KEY="${GOOGLE_API_KEY:?Set GOOGLE_API_KEY in your shell}"
Get your API key from Google AI Studio
3

Create Agent

Create app.py:
# if json_object is supported by the model
from praisonaiagents import Agent

agent = Agent(
    instructions="You are a helpful assistant",
    llm="gemini/gemini-1.5-flash-8b",
    reflection=True,
    
)

agent.start("Why sky is Blue?")

# if json_object is not supported by the model
from praisonaiagents import Agent

# Detailed LLM configuration
llm_config = {
    "model": "gemini/gemini-1.5-flash-latest",  # Model name without provider prefix
    
    # Core settings
    "temperature": 0.7,                # Controls randomness (like temperature)
    "timeout": 30,                 # Timeout in seconds
    "top_p": 0.9,                    # Nucleus sampling parameter
    "max_tokens": 1000,               # Max tokens in response
    
    # Advanced parameters
    "presence_penalty": 0.1,         # Penalize repetition of topics (-2.0 to 2.0)
    "frequency_penalty": 0.1,        # Penalize token repetition (-2.0 to 2.0)
    
    # API settings (optional)
    "api_key": None,                 # Your API key (or use environment variable)
    "base_url": None,                # Custom API endpoint if needed
    
    # Response formatting
    "response_format": {             # Force specific response format
        "type": "text"               # Options: "text", "json_object"
    },
    
    # Additional controls
    "seed": 42,                      # For reproducible responses
    "stop_phrases": ["##", "END"],   # Custom stop sequences
}

agent = Agent(
    instructions="You are a helpful Assistant specialized in scientific explanations. "
                "Provide clear, accurate, and engaging responses.",
    llm=llm_config,                  # Pass the detailed configuration
                        # Enable detailed output
                       # Format responses in markdown
    reflection=True,              # Enable self-reflection
    max_iterations=3,                  # Maximum reflection iterations
    min_iterations=1                   # Minimum reflection iterations
)

# Test the agent
response = agent.start("Why is the sky blue? Please explain in simple terms.")

Ollama Integration

export OPENAI_BASE_URL=http://localhost:11434/v1

Groq Integration

export OPENAI_API_KEY="${GROQ_API_KEY:?Set GROQ_API_KEY in your shell}"
export OPENAI_BASE_URL=https://api.groq.com/openai/v1

Google Gemini

export OPENAI_API_KEY="${GEMINI_API_KEY:?Set GEMINI_API_KEY in your shell}"
export OPENAI_BASE_URL=https://generativelanguage.googleapis.com/v1beta/openai/

Jan AI Integration

export OPENAI_BASE_URL=http://localhost:1337/v1

LM Studio Integration

export OPENAI_BASE_URL=http://localhost:1234/v1

OpenRouter Integration

export OPENAI_API_KEY="${OPENROUTER_API_KEY:?Set OPENROUTER_API_KEY in your shell}"
export OPENAI_BASE_URL=https://openrouter.ai/api/v1

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Provider Auto-Detection (no-config first run)

When you run praisonai run without setting --model or a model: key in config.yaml, PraisonAI inspects which supported provider credential is present in your environment and picks a provider-appropriate default — so a user whose only key is ANTHROPIC_API_KEY no longer gets an OpenAI auth error on first run.
Credential env varResolved default modelBase URL
OPENAI_API_KEYgpt-4o-minihttps://api.openai.com/v1
ANTHROPIC_API_KEYanthropic/claude-3-5-sonnet-latesthttps://api.anthropic.com/v1
GEMINI_API_KEYgemini/gemini-1.5-flashhttps://generativelanguage.googleapis.com/v1beta
GOOGLE_API_KEYgoogle/gemini-1.5-flashhttps://generativelanguage.googleapis.com/v1beta
GROQ_API_KEYgroq/llama-3.3-70b-versatilehttps://api.groq.com/openai/v1
COHERE_API_KEYcohere/command-rhttps://api.cohere.ai/v1
OLLAMA_HOSTollama/llama3.2http://localhost:11434/v1
(none of the above)gpt-4o-minihttps://api.openai.com/v1
Precedence: the first credential in the table that is set wins. If multiple provider keys are set, the one listed first takes effect.
The same resolver drives implicit defaults for praisonai run, praisonai chat, praisonai init scaffolding, praisonai setup, and the bare-praisonai TUI launch — not just run.
An explicit --model <name> flag or a model: key in config.yaml always overrides auto-detection.

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Supported Models for No Code

PraisonAI ChatPraisonAI CodePraisonAI (Multi-Agents)
LitellmLitellmBelow Models

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Example agents.yaml

This uses Multi-Agents with Multi-LLMs. 
framework: crewai
topic: research about the causes of lung disease
agents:  # Canonical: use 'agents' instead of 'roles'
  research_analyst:
    instructions:  # Canonical: use 'instructions' instead of 'backstory' Experienced in analyzing scientific data related to respiratory health.
    goal: Analyze data on lung diseases
    role: Research Analyst
    llm:  
      model: "groq/llama3-70b-8192"
    function_calling_llm: 
      model: "google/gemini-1.5-flash-001"
    tasks:
      data_analysis:
        description: Gather and analyze data on the causes and risk factors of lung
          diseases.
        expected_output: Report detailing key findings on lung disease causes.
    tools:
    - 'InternetSearchTool'
  medical_writer:
    instructions:  # Canonical: use 'instructions' instead of 'backstory' Skilled in translating complex medical information into accessible
      content.
    goal: Compile comprehensive content on lung disease causes
    role: Medical Writer
    llm:  
      model: "anthropic/claude-3-haiku-20240307"
    function_calling_llm: 
      model: "openai/gpt-4o"
    tasks:
      content_creation:
        description: Create detailed content summarizing the research findings on
          lung disease causes.
        expected_output: Document outlining various causes and risk factors of lung
          diseases.
    tools:
    - ''
  editor:
    instructions:  # Canonical: use 'instructions' instead of 'backstory' Proficient in editing medical content for accuracy and clarity.
    goal: Review and refine content on lung disease causes
    role: Editor
    llm:  
      model: "cohere/command-r"
    tasks:
      content_review:
        description: Edit and refine the compiled content on lung disease causes for
          accuracy and coherence.
        expected_output: Finalized document on lung disease causes ready for dissemination.
    tools:
    - ''
dependencies: []

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How It Works

The Agent passes your llm value to the provider resolver, which routes the request to the matching model and returns the response.

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Best Practices

Skip llm= on first runs. PraisonAI resolves a sensible default from whichever provider key is set — see Provider Auto-Detection.
Pass llm="gemini/gemini-1.5-flash-8b" or llm="anthropic/claude-3-5-sonnet-latest" to target a specific provider model.
Set provider keys in your shell or .env. Use api_key=None in llm_config so the SDK reads the environment variable.
Use a small fast model (gpt-4o-mini, gemini-1.5-flash) for routing and a larger model only where quality matters.

Quick Start

Run your first agent in a few lines.

Tools

Give models real actions with tools.