DeepSeek V3.1 vs DeepSeek V4.1-Flash

Best cell per row highlighted. Null means undisclosed — never counted as zero.

DeepSeek
DeepSeek V3.1GA
7.7
AI Panel
DeepSeek
DeepSeek V4.1-FlashGA
8.6
AI Panel

Identity & lifecycle

ProviderDeepSeekDeepSeek
Family / tierDeepSeek V3 · LargeDeepSeek V4 · Flash
StatusGAGA
Released2025-08-212026-09-10
Knowledge cutoff2025-06—

Architecture & context

Context window128K1M
Max output tokens8K384K
Input modalitiestexttext, image
Reasoning modeoptionaloptional
Open weightsYesYes

Pricing (per Mtok)

Input$0.21$0.3
Output$0.79$1.2
Cached input$0.021$0.006
Batch input——
Free tierNoYes

Speed

Output speed (tok/s)——
Time to first token (s)——
Latency tiermediumfast

Trust & deployment

Trains on inputsYesYes
LicenseMITMIT
Clouds——
Compliance——

AI Panel scoring

Unified score7.78.6
Decision Maker7.58.5
Domain Strategist7.59
Finance Lead8.59
Domain Practitioner89
Power User7.58.5
Skeptic7.57.5
Value score8.89.6

Benchmarks

MMLU-Pro83.7—
GPQA Diamond7490.9
AIME 202588—
SWE-bench Verified66—
LiveCodeBench80—
Aider Polyglot76.3—
Terminal-Bench—90.6
Humanity's Last Exam—36.8
LMArena Elo1417—
LMArena Coding Elo1461—

Scores link to their sources. Missing cells mean the vendor hasn't disclosed a result — honesty over padding.