tomtunguz.com · 2025-12-16 · 170d

The Bifurcation in the AI Market

The AI market is splitting into two segments: proprietary models retain pricing power in mission-critical enterprise applications despite being 10-100x more expensive, while open-source models capture cost-sensitive volume at stable ~22-25% market share. Programming has achieved product-market fit as the dominant use case (45-60% for leading enterprise providers), while roleplay dominates consumer usage, and retention rates vary significantly by model and use case.

9 metrics· Cited 0× in the knowledge base ·Open source ↗

Metrics in this report

AI Model User Churn (Month 1)

60-70percent

Typical loss rate across most AI models in first month

Claude Sonnet Month 1 Retention

40-50percent

Stronger retention model, November 2025

DeepSeek Open-Source Market Share

80percent

Early 2025 peak share

DeepSeek Open-Source Market Share

40percent

Late 2025 share after Chinese competitor gains

DeepSeek Roleplay Use Case Share

80percent

Dominance in consumer entertainment segment, November 2025

GPT-4o Mini Month 1 Retention

25-35percent

Weaker retention model, November 2025

Open-Source AI Market Share

22-25percent

Global AI model usage via OpenRouter, 2024-2025

Programming Use Case Share

60percent

Anthropic AI model usage, November 2025

Programming Use Case Share

45percent

xAI model usage, November 2025