OpenAI and Anthropic SDKs are recording approximately 85.8 million and 72.7 million monthly downloads respectively in 2026, but engagement metrics show a plateau or migration toward cheaper alternatives. Anthropic’s Claude Code dominates the coding-agent market with 81% of public commits on GitHub, while ChatGPT-driven documentation traffic dropped by 70% after August 2026 in favor of traffic linked to Claude. Meta halved its Claude Code usage and Microsoft cut its projected spend on Anthropic by more than one third, with both companies turning toward proprietary in-house solutions. The Ramp index shows an overall decline in AI spending, attributed to price cuts from both labs and intensifying competition, with open-source models representing under 5% of business expenditure.
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