OpenRouter: business spending on OpenAI and Anthropic models roughly even in September

According to OpenRouter, business spending on OpenAI and Anthropic models was roughly even in September, compared with Anthropic's 75% share in January. Both companies need to show sustainable businesses ahead of planned IPOs.

• Anthropic held a 75% share of business spending in January
• By September the shares of OpenAI and Anthropic were nearly even
• Both companies are preparing for planned IPOs