Businesses are fleeing Anthropic for OpenAI, but why?

anthropic lost its lead among us businesses to openai in q3, according to spend data from 70,000 companies using ramp. openai is growing faster than anthropic in the current quarter, driven by the adoption of its new gpt-5.6 sol model, while anthropic's fable 5 disappointed users due to cost and strict data retention requirements. despite the lead change, the overall market is expanding, with the percentage of companies paying for ai climbing to nearly 56% by july. this trend signals that enterprise ai spending is highly volatile and dependent on the latest model releases rather than long-term loyalty.