The Kimi K3 open-source model successfully solved a complex Bongard problem by leveraging tool use, a task that proprietary models Grok 4.5 from xAI and Muse Spark 1.1 from Meta AI were unable to complete. While noted as slow, Kimi K3 is deemed competent for long-running tasks, placing its problem-solving ability in line with Opus 4.8 and ChatGPT 5.6.
A new open-source model demonstrates advanced tool-use capabilities, raising the bar for open-source agentic performance against proprietary models.