OpenAI Splits GPT-5.6 Into a Three-Tier Family — Sol, Terra, and Luna — for Agents vs. General Use

Early users are trading 'recipes' for running GPT-5.6 Sol inside coding harnesses as OpenAI segments its lineup by workload rather than shipping one flagship.

OpenAI appears to be abandoning the single-flagship strategy in favor of a workload-segmented lineup. Multiple briefings this week reference GPT-5.6 in three named variants — Sol, Terra, and Luna — positioned for different classes of task, from agentic and coding work to general-purpose use. The naming convention suggests deliberate product tiering rather than the usual point-release incrementalism.

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