DeepSeek V4.1 Flash
by DeepSeek · ID deepseek-v4-1-flash · Released 2026-09 · Open Source
1476
ELO Score
-
MMLU
-
HumanEval
1M
Context Window
$0.30
Input Price
About DeepSeek V4.1 Flash
DeepSeek's September 10, 2026 replacement for V4 Flash, released as open weights under the MIT licence. 1M-token context and up to 384K tokens of output, with a much smaller KV cache that makes long cached prompts very cheap. Listed prices are peak-hour rates (01:00-04:00 and 06:00-10:00 UTC on weekdays); off-peak everything costs half, $0.15 input and $0.60 output, and cache hits are $0.003 off-peak. Prices checked 21 September 2026. Arena text score 1476 (DeepSeek-V4.1-Flash-20260910 (Max), 13,657 votes), leaderboard of 27 October 2026.
Not sure where to find it? Search query: "DeepSeek V4.1 Flash official"