LlamaIndex Integration

pip install llama-index-llms-helicone

from llama_index.llms.helicone import Helicone
from llama_index.llms.openai_like.base import ChatMessage

llm = Helicone(
    api_key="<helicone-api-key>",
    model="gpt-4o-mini",  # works across providers
    is_chat_model=True,
)

message: ChatMessage = ChatMessage(role="user", content="Hello world!")

response = llm.chat(messages=[message])
print(str(response))

export HELICONE_API_KEY=sk-helicone-...
# Optional override
export HELICONE_API_BASE=https://ai-gateway.helicone.ai/v1

from llama_index.llms.helicone import Helicone

llm = Helicone(
    model="gpt-4.1-mini",
    api_key="<helicone-api-key>",
    api_base="https://ai-gateway.helicone.ai/v1",
    default_headers={
        "Helicone-Session-Id": "demo-session",
        "Helicone-User-Id": "user-123",
        "Helicone-Property-Environment": "production",
    },
    temperature=0.2,
    max_tokens=256,
)