More Models from DeepSeek
Compare other engines available in this laboratory.
V4 Pro is a high-performance foundation model engineered by DeepSeek, accessible with Zero Data Retention on ARMES.
DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash — a 552B-parameter sparse Mixture-of-Experts model built on DeepSeek's Causal Encoder-Decoder (CED) architecture, activating only ~8B parameters during prefill and ~16B during decode. It pairs a 1,048,576-token context window with native image input, controllable reasoning effort, MIT-licensed open weights, and an extremely low price ($0.15/1M in, $0.60/1M out), positioning it as a cost-dominant agentic/coding workhorse.
DeepSeek V4.1 Flash (deepseek/deepseek-v4.1-flash) is DeepSeek's 552B-parameter sparse mixture-of-experts frontier-workhorse (released Sept 10, 2026), the first model built on the company's Causal Encoder-Decoder (CED) architecture with asymmetric activation of ~8B params on input and ~16B on output. Paired with a 1M-token (1,048,576) context window, native image modality, aggressive pricing and ~175 tps hosted throughput, it delivers near-flagship reasoning (GPQA Diamond 90.2, HLE-with-tools 63.9, AA Intelligence Index 39.5) and class-leading terminal/agentic coding (Terminal-Bench 2.1 90.6, DeepSWE v1.1 74.2) at a fraction of Pro-tier cost.