The Best LLM Token Monitoring Tools in 2026. And Which One You Actually Need.

Only 15 percent of GenAI deployments have LLM observability. The rest are flying blind on token costs. This guide ranks the ten best tools for measuring and controlling AI spending in 2026, from open-source tracing platforms like Langfuse and Helicone to budget-enforcing gateways like Portkey and LiteLLM.

Marcus Schuler April 7, 2026, 5:41 AM PST · 15 min read