Prime Intellect's autonomous AI research experiment has set a new record in the nanoGPT speed challenge. Utilizing Codex (GPT-5.5 xHigh) and Claude Code (Opus 4.7 xHigh), the team conducted approximately 10,000 experiments over 14,000 hours of H200 compute power. Opus achieved a new record by completing the challenge in 2,930 steps, surpassing the previous human record of 2,990 steps. Despite this achievement, the experiment highlighted limitations in AI capabilities, as both models struggled to propose new algorithms without existing human-developed code or papers. The models relied heavily on parameter sweeps of open-source technologies, with Codex prone to infinite loops and Claude frequently requiring human intervention.