{"slug": "openai-s-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a", "title": "OpenAI's GPT-5.6 Sol autonomously post-trained the smaller Luna model with a \"fairly underspecified prompt\"", "summary": "OpenAI's GPT-5.6 Sol autonomously fine-tuned the smaller Luna model using a single underspecified prompt, scoring 16.2 points higher than GPT-5.5 on an internal recursive self-improvement benchmark. The achievement suggests OpenAI is nearing its goal of an automated AI researcher.", "body_md": "According to OpenAI, GPT-5.6 Sol independently fine-tuned the smaller Luna model, triggered by a single \"fairly under-specified prompt.\" In OpenAI's internal RSI benchmark for recursive self-improvement, Sol scores 16.2 points higher than GPT-5.5. OpenAI believes the \"automated researcher\" is within reach.\n\nThe article [OpenAI's GPT-5.6 Sol autonomously post-trained the smaller Luna model with a \"fairly underspecified prompt\"](https://the-decoder.com/openais-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a-fairly-underspecified-prompt/) appeared first on [The Decoder](https://the-decoder.com).", "url": "https://wpnews.pro/news/openai-s-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a", "canonical_source": "https://the-decoder.com/openais-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a-fairly-underspecified-prompt/", "published_at": "2026-07-10 18:43:47+00:00", "updated_at": "2026-07-10 19:09:49.027510+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-research", "ai-agents"], "entities": ["OpenAI", "GPT-5.6 Sol", "Luna", "GPT-5.5"], "alternates": {"html": "https://wpnews.pro/news/openai-s-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a", "markdown": "https://wpnews.pro/news/openai-s-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a.md", "text": "https://wpnews.pro/news/openai-s-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a.txt", "jsonld": "https://wpnews.pro/news/openai-s-gpt-5-6-sol-autonomously-post-trained-the-smaller-luna-model-with-a.jsonld"}}