OpenAI: GPT-5.6 Terra

OpenAI's GPT-5.6 Terra is designed to process vast amounts of text, images, and files within an extensive context length of 1,050,000 tokens. This model supports reasoning capabilities and tools, making it versatile for complex tasks that require analysis and interaction with external resources. However, the model does not offer structured output or open weights. Given its high price point at $2.5 per million input tokens and $15 per million output tokens, GPT-5.6 Terra is most suitable for organizations willing to invest in advanced AI capabilities but lacking independent benchmark data on performance and effectiveness. With no available benchmark coverage, users should carefully weigh the costs against their specific needs before shortlisting this model.