Unverified50% confidenceFactExact time
OpenAI uses the semantic codenames "Sol" (sun) and "Luna" (moon) to differentiate between variants of the same model generation.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
8/8/2026
First Seen
Valid until: 11/6/2026
Sources
GPT-5.6 Sol持续优化，Luna向免费用户开放：模型分层策略解读
Related Claims
UnverifiedOpenAI introduced the Sol, Terra, and Luna series of model names, abandoning the numerical naming approach.71% similarUnverifiedOpenAI launched the Sol, Terra, and Luna series of models, imitating Anthropic's poetic naming approach.70% similarUnverifiedOpenAI改变命名逻辑，数字标识代际，Sol、Terra、Luna标识持久的能力层级，每层可独立迭代70% similarUnverifiedOpenAI models use the Codex environment in Frontier Code testing, Gemini models use Gemini CLI, and open-source models use Mini Agent.68% similarVerifiedSol is the flagship model, and OpenAI calls it its currently strongest programming model.64% similar
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