OpenAI: GPT-5.5

GPT-5.5 from OpenAI is designed to process text, files, and images, with an expansive context length of 1,050,000 tokens, enabling it to handle complex tasks seamlessly. It supports both reasoning and tools integration, making it versatile for a wide range of applications. While its benchmark scores are commendable, with a blended score of 93.1 across four independent benchmarks, GPT-5.5 is not free; pricing stands at $5.0 per million input tokens and $30.0 per million output tokens. This cost structure makes it more suitable for projects where precision and comprehensive handling of multiple modalities are critical but may be less economical for smaller-scale tasks or those with a lower budget.