A new AI model called Ox Alpha has emerged on the OpenRouter platform, reportedly surpassing prominent models Claude Fable 5 and GPT-5.6 Sol in coding tasks. The creator of Ox Alpha remains undisclosed, adding an element of intrigue to its capabilities. The model is currently accessible under OpenRouter’s « stealth » label, which conceals its upstream provider during the preview phase. This unexpected entrant challenges the established AI landscape, where GPT-5.6 Sol has been a leader according to multiple benchmarks. The prediction market for the best AI model by September 2026 shows a slight decrease in Anthropic’s implied chances of retaining the top spot.
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