OpenAI: GPT-5.6 Luna (batch)

GPT-5.6 Luna from OpenAI is designed to handle text, file, and image inputs with a context length of 1,050,000 tokens, supporting both reasoning and tool usage. It excels in coding tasks, achieving a perfect score in its benchmark suite. However, it lacks structured output support and does not offer open weights for customization. While GPT-5.6 Luna offers robust capabilities at a price point of $0.1 per million input tokens and $0.6 per million output tokens, making it cost-effective for projects requiring extensive text processing and reasoning, its current blended benchmark score of 88.2 across three independent benchmarks suggests that it may be more suited for applications where coding is the primary focus rather than general agentic AI tasks.