← All news·2026-07-11·3 min read

GPT-5.6 Sol Trained OpenAI's Next Model Without Human Involvement

GPT-5.6 Sol autonomously fine-tuned the Luna model from a single brief — a task that previously took two senior researchers two weeks.

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OpenAI demonstrated how one AI can train another with almost no human involvement. GPT-5.6 Sol was given a short brief — configure and launch training for the Luna model — and independently selected the configuration, provisioned servers, and kicked off the run. A task that previously took a two-person team of senior researchers two weeks completed autonomously.

The results at OpenAI: a single researcher's daily output has doubled, and internal compute for coding has grown 100x. On the internal RSI benchmark — which measures models' ability to improve themselves — Sol outscored the previous generation by 16 points. The line between AI as a tool and AI as a development collaborator is blurring faster than even OpenAI anticipated.

Source: the-decoder.com

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EAEvgenii Arsentev

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Evgenii Arsentev

PhD · Chief Executive Officer, digital health