OpenAI: GPT-6 Luna (batch)

OpenAI's GPT-6 Luna, released on September 22, 2026, is positioned as a fast and cost-efficient model within the GPT-6 series, designed for high-volume and latency-sensitive applications. It performs among the fastest models, ranking in the 74th percentile for speed across eight benchmarks, and consistently offers highly competitive pricing, placing in the 82nd percentile. Notably, GPT-6 Luna demonstrates exceptional reliability, achieving a 100% success rate across all benchmarks, indicating minimal technical failures. The model exhibits strong performance across various categories. It excels in Hallucinations (Baseline) with 98.0% accuracy, effectively acknowledging uncertainty, and shows robust Instruction Following at 80.0% accuracy. Coding (Baseline) is a significant strength, achieving 95.0% accuracy, placing it in the 89th percentile. Reasoning (Baseline) is another highlight, with 96.0% accuracy and an impressive 90th percentile duration ranking. While General Knowledge (99.0%) and Ethics (99.0%) show high accuracy, their percentile rankings are more moderate. Email Classification (97.0%) is a relative weakness in terms of percentile ranking (41st percentile), suggesting it performs adequately but not exceptionally compared to peers in this specific task. Overall, GPT-6 Luna's key strengths lie in its speed, cost-efficiency, reliability, and strong performance in coding and reasoning tasks, making it well-suited for its intended high-volume applications.