OpenAI launches GPT-5.6 with tiered Sol, Terra, and Luna models

OpenAI has launched GPT-5.6, a new model family that deviates from its previous single-model approach by offering three distinct tiers: Sol, Terra, and Luna. Sol is designed for complex reasoning and coding tasks, positioned as a cybersecurity model and powering ChatGPT Work. Terra offers capabilities comparable to GPT-5.5 at a reduced cost, serving as a general-purpose option. Luna is the fastest and most economical tier, suitable for high-volume, less complex tasks. The tiered pricing structure aims to provide users with more cost-effective choices based on their specific workload needs. AI

IMPACT Introduces a tiered pricing and capability model, potentially lowering costs for general use cases and increasing competition in specialized coding tasks.

RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on dev.to — LLM tag →

• Anthropic
• Artificial Analysis Coding Agent Index
• ChatGPT Work
• Claude Fable 5
• GPT-5.5
• GPT-5.6
• Luna
• OpenAI
• Sam Altman
• Sol

• model release
• product

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