Research
Data and research
Studies The Agents Index runs on the agents it lists, each with its data and its method.
Studies
AI Agent Pricing Index
The median AI agent started at $29 a month in October 2026, and 57% had a free tier.
Latest: October 2026 · checked 13 October 2026
Read the studyPrices (CSV)Categories (CSV)Changes (CSV)Method
Tables
Which models each coding agent runs on
Claude, GPT, open-weight models and your own API key: what each coding agent supports, from its maker's own pages, with the day we checked.
Updated 24 October 2026
Reports
All reportsWhich AI Agents Are Free to Start? 60 of 94
We read the published pricing tiers of the 94 classified AI agents in our index on 27 August 2026. 60 offer an ongoing free tier and 34 do not.
Data report · 19 August 2026 · 9 min read
Research or Data Agent? 6 of 11 Return Structured Data
Our Research & data agents category holds 11 tools. Re-verified 26 August 2026: 6 return structured, machine-readable output as a named feature; 5 return prose.
Data report · 14 August 2026 · 8 min read
Which Coding Agents Run Commands Without Asking? 21 Tools, Checked
Cursor auto-applies edits but asks before commands. Codex CLI and OpenCode run both by default. We checked all 21 coding agents in our index against their own docs.
Data report · 11 August 2026 · 9 min read
Which AI Agent Frameworks Support A2A? 12, Verified
A2A lets agents on different frameworks talk to each other. We checked all 12 frameworks in our index: 4 ship it natively, 3 as an add-on, 4 don't support it yet.
Data report · 9 August 2026 · 6 min read
Does Your Coding Agent Train on Your Code? 21 Tools, Checked
SOC 2 confirms an audit was passed, not whether your code trains a model. We checked the default training policy, tier by tier, for 21 coding agents in our index.
Data report · 6 August 2026 · 10 min read
Terminal-Bench 2.1: How Our Indexed Coding Agents Actually Score
Stanford/Laude Institute's independent Terminal-Bench results, matched against the coding agents in our index: accuracy, model pairing and cost, not vendor claims.
Data report · 2 August 2026 · 5 min read
GitHub Star Velocity: 30 Open-Source AI Agents Measured 7 Days Apart
Stars for 32 trackable open-source AI agents in our index, counted 2026-08-18 and 2026-08-25. OpenAI Codex CLI gained 11,317 stars in 7 days.
Data report · 1 August 2026 · 10 min read
What Is MCP, and Which AI Agents Mention It?
We searched each listing's own attributes, key features and integrations for the text "MCP" on 27 August 2026: 70 of 94 mention it, 24 do not.
Market analysis · 22 July 2026 · 10 min read
9 AI agent tools that changed how they charge in 2026
Nine 2026 pricing-change case studies, with verified old and new terms and what they mean for buyers of “free,” “bundled,” or “unlimited” plans.
Market analysis · 21 July 2026 · 14 min read
Who owns the AI agent you're building on? A 2025–2026 field guide
Six tools in our index changed hands or raised historic rounds in nine months. What happened, what it already broke, and how to judge the risk before you adopt.
Market analysis · 21 July 2026 · 9 min read
AI Agent Statistics 2026: Adoption, Production, and Trust
Sourced 2026 statistics on AI agent adoption, production and developer trust, from Gartner, McKinsey, LangChain and Stack Overflow, plus our own 94-tool index.
Statistics · 21 July 2026 · 12 min read
AI voice agent funding vs. real growth: the 2026 gap
Vapi, Retell AI, Bland AI, ElevenLabs and Cartesia raised very different amounts. The one that raised the least reports the fastest, most profitable growth.
Market analysis · 21 July 2026 · 8 min read