Ramp AI Index March 2026: Business AI Adoption Hits Record 47.6%, Anthropic Reaches 24.4% — Wins 70% of Head-to-Head Enterprise Matchups Against OpenAI

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Ramp's March 2026 AI Index shows business AI adoption at a record 47.6%, with Anthropic at 24.4% of businesses (up from 1 in 25 a year ago) growing 4.9% month-over-month — its largest monthly gain since tracking began. OpenAI saw its largest single-month decline at -1.5%. Anthropic now wins approximately 70% of head-to-head matchups among first-time enterprise AI buyers, a complete reversal of 2025 trends. Average enterprise AI contract values projected to reach $1M in 2026, up from $530K in 2025. Google sits at 4.7% and xAI under 2%.