The 2026 Assembly Index

About this report

Now in its fourth year, the Assembly Index is the largest published benchmark of agent reliability drawn from production run data rather than evaluation suites.

This edition covers 2.3 million runs across 210 organisations in fourteen countries, measured continuously through the twelve months to June 2026.

What is inside

• Methodology and sample composition
• Headline findings, with year-on-year comparison
• Breakdown by industry and organisation size
• What we would do differently next time