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OpenAI's GPT-5.6 — Sol, Terra, Luna: Does It Really Stack Up to Claude Fable 5?
OpenAI's GPT-5.6 arrives as a three-tier family — Sol, Terra, Luna — and beats Claude Fable 5 on its headline agentic benchmark, but the verified feedback so far tells a more mixed story.
OpenAI Launches GPT-5.6 with Three New Models: Sol, Terra, and Luna
OpenAI's GPT-5.6 family splits into three tiers — Sol, Terra, and Luna — each priced and tuned for a different job, from heavy-duty coding agents to cheap, high-volume automation.
GPT-5.6 Lands in Preview: Sol, Terra, and Luna
OpenAI is previewing GPT-5.6 as a three-model family — Sol, the new flagship; Terra, a cheaper everyday workhorse; and Luna, a fast budget tier. Sol sets a record on Terminal-Bench 2.1 and edges out Claude Mythos 5. Here's what shipped and how to get it.
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