# GPT-5.6 Sol - not a new brain, but a new build

*Published on: Fri, 26 Jun 2026 20:04:59 GMT*

GPT-5.6 Sol - not a new brain, but a new build

Sol is not a new base model trained from scratch. This has already been confirmed in the release discussion.

Base training is the stage where a model forms its foundation: language, knowledge, logic, world understanding, and the ability to solve tasks.

So GPT-5.6 is not a new foundation, but an improvement of the existing line: additional training, reasoning, tools, and operating modes.

The real revolution will start with a new base model.

Most likely, that will be GPT-6.

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