GPT-5.6 Sol and Terra: Where they fit for coding agents and code review
OpenAI’s GPT-5.6 family includes capability tiers: Sol as the flagship model, Terra as the lower-cost option, and Luna as the fastest, lowest-cost tier.
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OpenAI launches GPT-5.6 family with Sol, Terra, and Luna models for general availability
More intelligence from every token, stronger performance per dollar, and more capability on demand for your hardest work.
OpenAI launches GPT-5.6 family with Sol, Terra, and Luna models for general availability
More intelligence from every token, stronger performance per dollar, and more capability on demand for your hardest work.

OpenAI approved to launch GPT-5.6 models to the public on July 9
Sol is the flagship model, while Terra is described as twice as cheap as GPT-5.5 and Luna as the lowest-cost option.

OpenAI launches GPT-5.6 with Sol, Terra and Luna tiers
Sam Altman called GPT-5.6 OpenAI's best model as the company pushes developers toward agentic work priced by capability tier.
OpenAI previews GPT-5.6 series with Sol, Terra, and Luna models, featuring enhanced safety measures
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most
OpenAI previews GPT-5.6 series with Sol, Terra, and Luna models, featuring enhanced safety measures
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most
OpenAI previews GPT-5.6 series with Sol, Terra, and Luna models, featuring enhanced safety measures
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most
OpenAI previews GPT-5.6 series with Sol, Terra, and Luna models, featuring enhanced safety measures
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most
OpenAI previews GPT-5.6 series with Sol, Terra, and Luna models, featuring enhanced safety measures
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most
OpenAI previews GPT-5.6 series with Sol, Terra, and Luna models, featuring enhanced safety measures
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most
OpenAI Launches GPT-5.6: Sol, Terra, Luna Models Go Live
OpenAI's GPT-5.6, featuring Sol, Terra, and Luna models, launches globally with enhanced performance and tiered pricing. Key upgrade for AI
GPT-5.6 Sol Review: OpenAI's Three-Tier Flagship Lands With Government-Gated Access and a Cheating Model
OpenAI's GPT-5.6 family (Sol, Terra, Luna) previewed June 26 with best-in-class coding benchmarks, restricted government-approved access, an

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