promptfoo--promptfoo/examples/provider-litellm/promptfooconfig.yaml

# yaml-language-server: $schema=https://promptfoo.dev/config-schema.json
description: LiteLLM provider example - unified interface for multiple LLMs

# This example demonstrates the LiteLLM provider, which provides a unified
# interface to 400+ LLMs through a proxy server.
#
# REQUIREMENTS:
# 1. LiteLLM proxy server must be running (use ./start-proxy.sh)
# 2. Set API keys: OPENAI_API_KEY, ANTHROPIC_API_KEY, GOOGLE_AI_API_KEY

prompts:
  - 'Translate this to {{language}}: {{text}}'
  - 'Write a haiku about {{topic}}'

providers:
  # All providers use the litellm: prefix and connect through the proxy
  - litellm:gpt-4.1
  - litellm:claude-sonnet-4-6
  - litellm:gemini-2.5-pro

# Configure embedding provider for similarity assertions
# This also goes through the LiteLLM proxy
defaultTest:
  options:
    provider:
      embedding: litellm:embedding:text-embedding-3-large

tests:
  - vars:
      language: French
      text: 'Hello, world!'
    assert:
      - type: contains
        value: 'Bonjour'
      - type: similar
        value: 'Bonjour, le monde!'
        threshold: 0.8

  - vars:
      topic: 'artificial intelligence'
    assert:
      - type: javascript
        value: |
          // Check if output is a haiku (3 lines)
          const lines = output.trim().split('\n').filter(line => line.trim());
          return lines.length === 3;