{"slug": "gpt-5-6-sol-terra-luna-compare-on-intelligence-vs-cost", "title": "GPT-5.6 Sol, Terra, Luna compare on intelligence vs. cost", "summary": "OpenAI's GPT-5.6 Sol and Luna models outperform GPT-5.6 Terra on intelligence per cost, with Luna emerging as the most cost-efficient variant. The Artificial Analysis Intelligence Index shows both Sol and Luna dominate Terra across all reasoning effort levels, pushing past GPT-5.5 on the Pareto frontier.", "body_md": "[All articles](/articles)\n\nJuly 13, 2026\n\n# How GPT-5.6 Sol, Terra, Luna compare on intelligence vs cost\n\n**GPT-5.6 Sol and Luna are ahead of Terra at every point on the Intelligence vs Cost per Task chart. GPT-5.6 Luna stands out as a particularly cost efficient model**\n\nCharting the Artificial Analysis Intelligence Index shows the trade-off between intelligence and Cost per Intelligence Index Task. Across reasoning efforts, each GPT-5.6 model pushes past GPT-5.5 on the Pareto frontier (excluding non-reasoning).\n\nHowever, Luna and Sol are always ahead of Terra. This means for any Terra effort level, there is a Luna or Sol effort level that is more intelligent at no extra cost, or as intelligent at lower cost.\n\nCompare GPT-5.6 Sol, Terra, and Luna with other leading models at [https://artificialanalysis.ai](https://artificialanalysis.ai)\n\n#### Read the latest\n\n### Muse Spark 1.1: Meta gains 8 Intelligence Index points in three months\n\nMeta's Muse Spark 1.1 scores 51 on the Artificial Analysis Intelligence Index and is cost and token efficient compared to its peers\n\nJuly 10, 2026\n\n### GPT-5.6 benchmarks across Intelligence, Speed and Cost\n\nGPT-5.6 Sol comes close second to Claude Fable 5 in the Artificial Analysis Intelligence Index at one third of the cost, and leads the Artificial Analysis Coding Agent Index in OpenAI’s Codex harness\n\nJuly 9, 2026\n\n### Announcing EnterpriseOps-Gym-AA\n\nOur independent leaderboard for ServiceNow’s EnterpriseOps-Gym\n\nJuly 8, 2026", "url": "https://wpnews.pro/news/gpt-5-6-sol-terra-luna-compare-on-intelligence-vs-cost", "canonical_source": "https://artificialanalysis.ai/articles/gpt-5-6-intelligence-vs-cost-across-sol-terra-luna", "published_at": "2026-07-15 02:53:52+00:00", "updated_at": "2026-07-15 03:18:36.582993+00:00", "lang": "en", "topics": ["large-language-models", "artificial-intelligence", "ai-products"], "entities": ["OpenAI", "GPT-5.6 Sol", "GPT-5.6 Terra", "GPT-5.6 Luna", "Artificial Analysis", "Claude Fable 5", "Meta", "Muse Spark 1.1"], "alternates": {"html": "https://wpnews.pro/news/gpt-5-6-sol-terra-luna-compare-on-intelligence-vs-cost", "markdown": "https://wpnews.pro/news/gpt-5-6-sol-terra-luna-compare-on-intelligence-vs-cost.md", "text": "https://wpnews.pro/news/gpt-5-6-sol-terra-luna-compare-on-intelligence-vs-cost.txt", "jsonld": "https://wpnews.pro/news/gpt-5-6-sol-terra-luna-compare-on-intelligence-vs-cost.jsonld"}}