GPT-5.6 Sol drives OpenAI's revenue surge as it regains ground on Anthropic
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OpenAI has regained momentum against rival Anthropic following the July 9 launch of GPT-5.6 Sol, with overall revenue rising 35 percent in the quarter and enterprise revenue growing over 50 percent. Data from Ramp shows OpenAI's business API spending growth outpaced Anthropic's in Q3, at 82 percent quarter-over-quarter versus 76 percent. OpenAI's next model, Astra, is expected to launch in the coming weeks, while Anthropic may respond with an improved Fable 5.1. Prior to GPT-5.6 Sol, Anthropic had reached a $65 billion annualized revenue run rate and overtaken OpenAI in quarterly revenue for the first time, pulling in $11.6 billion compared to OpenAI's $6.7 billion. Growth had slowed at both labs partly because open-weight models were gaining ground.
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