deepseek/deepseek-v4.1-flashDeepSeek V4.1 Flash is DeepSeek’s AI model, released Sep 10, 2026. It costs $0.15/M input and $0.60/M output tokens, and handles a 1M-token context window. Its strongest use case is reasoning & knowledge, where it ranks in the 76th percentile of the models Model Beat tracks.
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture.
Scores on standardized evaluations. Higher is better — and rank shows where DeepSeek V4.1 Flash lands among all models tracked on Model Beat.
Frontier of human expert knowledge
Scientific research coding
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture.
DeepSeek V4.1 Flash is an AI model developed by DeepSeek, part of the DeepSeek family, released Sep 10, 2026.
DeepSeek V4.1 Flash's list price from DeepSeek is $0.15 per million input tokens and $0.60 per million output tokens.
DeepSeek V4.1 Flash supports a context window of up to 1M tokens.
On standardized evaluations tracked by Epoch AI, DeepSeek V4.1 Flash scores 39.2% on Humanity's Last Exam, 51.9% on SciCode.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 14, 2026.