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Documentation Index

Fetch the complete documentation index at: https://handbook.fiddler.ai/llms.txt

Use this file to discover all available pages before exploring further.

Track new features, fixes, and deprecations across the Fiddler platform and its SDKs. Each section below has its own page and its own RSS feed.
Latest platform release: Release 26.9 — May 5, 2026. AWS Bedrock and Azure providers in LLM Gateway, custom histogram bins for numerical columns, and new min()/max() FQL aggregates. See Product releases for full notes.

Platform

Product releases

Platform features, enhancements, and fixes for Fiddler AI Observability.

Python client compatibility matrix

Recommended fiddler-client version for each Fiddler platform release.

SDKs

Python Client SDK

Releases of fiddler-client — model onboarding, publishing, baselines, alerts, and custom metrics.

Fiddler Evals SDK

Releases of fiddler-evals — built-in and custom LLM-as-a-judge evaluators for experiments and regression tests.

Fiddler LangGraph SDK

Releases of fiddler-langgraph — auto-instrumentation and tracing for LangGraph agents.

Fiddler Strands Agent SDK

Releases of fiddler-strands — instrumentation and tracing for Strands Agents.

Fiddler LangChain SDK

Releases of fiddler-langchain — middleware-based instrumentation for LangChain V1 agents.

Fiddler OTel SDK

Releases of fiddler-otel — the shared OpenTelemetry foundation used by the agentic SDKs.

Subscribe

Every changelog page exposes an RSS feed at the same URL with /rss.xml appended — for example, https://docs.fiddler.ai/changelog/product-releases/rss.xml. Look for the RSS icon at the top of any release-notes page, or add the feed directly to Slack, email, or your reader of choice.