Traders see Anthropic holding a narrow edge at 54.7% implied probability for the top Text Arena Math AI model by end of November, driven by its recent large language model releases that have posted leading results on rigorous mathematical reasoning benchmarks. Google sits close behind at 37%, reflecting steady gains in model scale and training techniques, while OpenAI and Meta trail significantly at 5% and 7.2% amid shifting priorities toward general capabilities and multimodal features. The crowded field of lower-probability contenders highlights intense competition across labs, where small differences in benchmark scores or targeted fine-tuning can shift outcomes. Key catalysts ahead include any final model updates or third-party evaluations before resolution.