openai/gpt-5.6-lunaGPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.6 Luna lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series.
GPT-5.6 Luna is an AI model developed by OpenAI, part of the GPT family, released Jul 9, 2026.
GPT-5.6 Luna's list price from OpenAI is $1 per million input tokens and $6 per million output tokens.
GPT-5.6 Luna supports a context window of up to 1.1M tokens.
On standardized evaluations tracked by Epoch AI, GPT-5.6 Luna scores 52.5% on SciCode, 37.2% on Humanity's Last Exam, 91.1% on GPQA Diamond.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 9, 2026.