OpenAI Unveils GPT-5.6 Model Family, Flagship Sol Challenges Claude Fable 5

OpenAI has officially released the GPT-5.6 family of AI models, introducing multiple models designed for different performance and cost requirements. Leading the lineup is GPT-5.6 Sol, which is reported to outperform Anthropic's Claude Fable 5 in several benchmark tasks while requiring only around half the inference cost, making it an attractive option for developers and enterprises seeking both high performance and efficiency.