OpenAI: GPT-5.5 (batch)

OpenAI's GPT-5.5 (batch) is a powerful AI model capable of handling text, file, and image inputs within an extensive context length of 1,050,000 tokens. It supports both reasoning and tools integration, making it versatile for complex tasks. However, structured output support is not specified. This model should be shortlisted by users requiring high-context handling and advanced reasoning capabilities, particularly in coding tasks where it scores perfectly at 100.0 on the AI Index Coding benchmark. With a blended score of 93.1 across four independent benchmarks and pricing at $2.5 per million input tokens and $15 per million output tokens, GPT-5.5 offers robust performance but comes with a cost that may be justified for mission-critical applications.