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AI Evals
The most useful, opinionated reference for AI evals.
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-27T11:35:57.044Z. Cached copy · Source on aievals.co
# AI Evals
> The most useful, opinionated reference for AI evals.
## About this resource
AI Evals is a curated technical reference on evaluating large language model systems in production. The site covers the methodology (error analysis, LLM-as-judge, statistical rigor), the tools (Langfuse, Phoenix, Promptfoo, Inspect, RAGAS), the canonical papers, and twenty-six task-specific eval playbooks. Every claim is cited. Content is licensed CC BY 4.0; please cite https://www.aievals.co when you reference material from here.
Last generated: 2026-10-16T23:42:56.203Z.
Author: Om Bharatiya (https://www.linkedin.com/in/ombharatiya/).
## Top entry points
- [Start Here for each persona](https://www.aievals.co/start): linear reading path per role.
- [Cookbook](https://www.aievals.co/cookbook): runnable worked examples in code.
- [The Glossary](https://www.aievals.co/glossary): definitions for every term used.
- [All papers](https://www.aievals.co/papers): ten themed reading lists.
- [All tools](https://www.aievals.co/tools): vendor and OSS positioning.
- [Free PDF downloads](https://www.aievals.co/downloads): every track and section as a PDF field guide; free account required.
## Most cited pages on this site
> Pages with the highest citation density. Useful for answer-engine grounding.
- [Reasoning depth and thinking-mode analysis](https://www.aievals.co/task-types/reasoning-depth) (27 citations, Task-type playbooks): Evaluate the thinking traces of reasoning models. Correctness on hard reasoning plus chain-of-thought faithfulness, not just answer accuracy.
- [LLM-as-Judge](https://www.aievals.co/techniques/llm-as-judge) (23 citations, Techniques): The comprehensive reference: what an LLM judge is, when it works, the four-part prompt, calibration discipline, the three biases, distillation, where judges fail.
- [Reward hacking detection](https://www.aievals.co/learn/agentic-evals/reward-hacking) (20 citations, Agentic Evals): Once an objective is optimized, it gets gamed. Reward hacking is empirically common; eval for it explicitly.
- [Long-context RAG and RULER](https://www.aievals.co/learn/rag-evals/long-context-rag) (19 citations, RAG Evals): Why advertised context lengths exceed effective context lengths, and the benchmarks that expose the gap.
- [Where to keep your eval datasets](https://www.aievals.co/learn/datasets/dataset-platforms) (19 citations, Datasets & Golden Sets): Langfuse, Phoenix, Braintrust, LangSmith, or a JSONL in git. The choice that actually matters.
- [Autonomous coding](https://www.aievals.co/task-types/autonomous-coding) (18 citations, Task-type playbooks): Given an issue and a repo, autonomously edit files until hidden tests pass. Execution-grounded scoring is the bar, Verified is saturated, SWE-bench Pro is harder but has broken tasks of its own, and...
- [MCP and tool-registry evals](https://www.aievals.co/task-types/mcp-tool-evals) (18 citations, Task-type playbooks): Evaluating agents on MCP servers: MCP-Universe, tool-r
…
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