OpenAI Surpasses Anthropic In OpenRouter Developer Spend After 2.5 Years

15 Sept 2026, 11:36 pm · 16h ago · 1 min read · OfficeChai

OpenAI has overtaken rival Anthropic in developer usage and spending on model aggregator OpenRouter for the first time since February 2024. The milestone marks a major reversal on the platform, where Anthropic's Claude models had maintained consistent market dominance among developers and software startups over the past two and a half years. The resurgence highlights strong adoption for OpenAI's latest model releases among engineering teams routing multi-model API workloads through third-party gateways, intensifying foundation model competition ahead of Anthropic's anticipated public market listing.