K2 Think V2 is a fully sovereign open-source reasoning system, built end-to-end on K2-V2. Together, they represent a new approach to advanced AI reasoning: system-level co-design rather than scale alone.
At 70 billion parameters, K2 Think V2 delivers reasoning performance competitive with flagship proprietary systems built on hundreds of billions of parameters, demonstrating that efficiency comes from system design, rather than brute-force scale.
This breakthrough makes K2 Think V2 the world's most parameter efficient advanced reasoning model, redefining what is possible with compact architectures.
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The latest Artificial Analysis results show the K2 family advancing +4 points on the Intelligence Index, powered by dramatically lower hallucination rates (89% > 52%) and stronger long-context reasoning (33% > 53%), extending the core strengths of K2-V2 into more reliable, scalable intelligence.
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With its higher Intelligence Index, K2 Think now moves decisively into the chart's most attractive region. Combining frontier-level reasoning with uncompromised openness, it's now placed squarely on the Pareto frontier of open-weights reasoning models.
