DeepSeek V3.2's path to GPT-5-level performance: sparse attention, RL at scale, and context reuse

DeepSeek-V3.2 showcases significant advancements in reducing long-context compute costs, achieving GPT-5 level reasoning by utilizing architectural improvements and scaling reinforcement learning (RL). The model employs DeepSeek Sparse Attention (DSA) layered on multi-head latent attention (MLA) to filter out less relevant tokens, effectively managing compute resources during inference. This approach allows DeepSeek-V3.2 to maintain efficiency with a smaller, older backbone, positioning it as a cost-effective alternative to closed-source counterparts. The model emphasizes scaling RL, with a focus on aligning training objectives with infrastructure capabilities, and introduces innovative context management strategies to enhance reasoning efficiency without exceeding context windows. Despite requiring more tokens than closed-source models, DeepSeek-V3.2 remains highly competitive on numerous reasoning and coding benchmarks, offering an economical solution for high-quality reasoning tasks.