Best Open-Source Research & Reasoning AI Agents (2026)
As of July 2026, the top open-source research & reasoning AI agent is last30days-skill by mvanhorn, with an overall score of 85.4 / 100. 3 research & reasoning agents are tracked in this category on The Agentic Leaderboard.
| Rank | Agent | Score |
|---|---|---|
| #19 | last30days-skill by mvanhorn | 85.4 |
| #25 | scientific-agent-skills by K-Dense-AI | 85.2 |
| #49 | gpt-researcher by assafelovic | 84.4 |