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steel-browser

Open-source browser API optimised for AI agents. It provides session management, stealth settings, proxy rotation, and a REST/WebSocket interface on top of Chromium for cloud-scale agent browser access.

plannotator

Interactive plan review UI that intercepts ExitPlanMode via hooks, letting users visually annotate plans with comments, deletions, and replacements before approving or denying with detailed feedback.

swe-bench

SWE-bench: benchmark for evaluating LLMs on real-world GitHub issue resolution across 12 popular Python repositories.

microsandbox

Use as the OSS self-hosted sandbox when you need to run agent code on your own infra: libkrun-based microVM isolation with no per-sandbox vendor cost, the escape hatch from a managed runtime at high volume.

giskard

Open-source LLM testing framework for detecting vulnerabilities (prompt injection, hallucinations, bias) via automated scan.

agenta

Open-source LLM developer platform with prompt playground, evaluation pipelines, and A/B testing for iterating on LLM apps.

openai-simple-evals

OpenAI's lightweight benchmark suite (MMLU, HumanEval, MATH, GPQA, MGSM) for fast model capability comparisons.

claude-managed-agents-selfhost

Use for enterprise hosted-control agents (the agent loop runs at the provider while execution happens on your own infrastructure) when you want a managed control plane but data and code must stay on your machines.

big-bench

Google's Beyond the Imitation Game benchmark: 200+ diverse tasks designed to probe capabilities beyond standard NLP benchmarks.

trulens

Evaluation and tracking for LLM and RAG applications with a feedback-function API and experiment dashboard.

xlang-ai-osworld

[NeurIPS 2024] OSWorld: Benchmarking Multimodal Agents for Open-Ended Tasks in Real Computer Environments

Contributed by Sentinel

inspect-ai

UK AISI's framework for safety evaluations of large language models, with task-based scaffolding and solver pipelines.

helm

Stanford CRFM Holistic Evaluation of Language Models: standardized benchmark suite covering accuracy, calibration, robustness, and fairness.

sysbox

Next-generation container runtime enabling Docker-in-Docker and VM-like isolation without privileged containers.

lighteval

Hugging Face lightweight evaluation library for LLMs across academic benchmarks, with fast local and remote inference support.

open-operator

Browserbase Open Operator: an open-source Operator-style web agent built on Stagehand; demonstrates full task decomposition, action planning, and evidence collection using the Browserbase cloud.

tdd-guard

A hooks-driven system that monitors file operations in real-time and blocks changes that violate TDD principles.

notte

Notte open-source web agent environment. It converts browser sessions into a Markov Decision Process with structured observation/action spaces, making browsers first-class RL and LLM agent environments.

evalplus

Rigorous code generation evaluation framework built on top of HumanEval and MBPP with 80x more test cases.

webarena

WebArena: realistic web-based environment for evaluating autonomous agents on long-horizon browser interaction tasks.

tau-bench

Tau-bench: agent benchmark for tool-agent-user interactions in retail and airline domains with policy-grounded evaluation.

harbor-framework-terminal-bench

Measuring and evolving with the frontier of agent work

Contributed by Sentinel

e2b-desktop

E2B Desktop Sandbox: a cloud virtual desktop (Ubuntu + VNC) with Python SDK for screenshot, mouse, keyboard, and process control; designed for AI agents that need a full GUI environment in an isolated VM.

agent-e

Emergence AI agent-E browser agent: hierarchical LLM-based web automation that uses DOM distillation and action abstraction layers to achieve significantly higher benchmark accuracy than prior browser agents.