# Mastra adds time-to-first-chunk and time-to-first-token latency metrics to observability

> Original title: Introducing Latency Metrics for Mastra Observability

- Source: Mastra Blog
- Published: 2026-11-05T05:00:00.000Z
- Bad Influence: https://badinfluence.news/items/j3r3uqb2xygihnhhzs07qfzss
- Original: https://mastra.ai/blog/introducing-latency-metrics

## Summary

Mastra says users can now track time to first chunk (TTFC) and time to first token (TTFT) for every agent and model call in Mastra platform and Studio. The metrics can be filtered and sorted in traces, spans, and threads, and queried through the Mastra CLI, Client SDK, and observability endpoints. They work on Mastra platform and self-hosted projects using DuckDB, PostgreSQL, or ClickHouse storage, and require mastra@1.30.0 or later.