DeepSeek-V3.1
Hybrid-reasoning DeepSeek model with thinking and non-thinking modes
- Context window
- 131.1K tokens in · 8.2K out
- Since the last one
- 150 days after DeepSeek V3 0324
Since DeepSeek V3 0324
8 releases in the DeepSeek V4 Preview line.
DeepSeek-V2.5Sep 5, 2024112dDeepSeek-V3Dec 26, 202488dDeepSeek V3 0324Mar 24, 2025150dDeepSeek V3.1Aug 21, 20250dDeepSeek-V3.1Aug 21, 202539dDeepSeek-V3.2-ExpSep 29, 202563dDeepSeek V3.2Dec 1, 2025
Released150 days later
Context131.1Kwas 163.8K
A newer release is out: DeepSeek V4 Preview.
ECI STANDING#124 of 270
SCORE139.79135.65–143.26 CI
FRONTIER LAGLaunched 8.1 months behindScores about what o1 did in December 2024.
SCORES LIKE THESE MODELS
Full Epoch Capabilities Index ranking ↗Kimi K2 (Jul 2025)Moonshot · Jul 2025139.97
Gemini 2.5 Flash (Apr 2025)Google DeepMind · Apr 2025139.84
gpt-oss-120bOpenAI · Aug 2025139.79Qwen3-30B-A3B-Thinking (Jul 2025)Alibaba · Jul 2025139.55
Epoch benchmark boards
Best result on each board it has run. The tick marks the leader.
DTBench83%#73 of 179
WeirdML38%#97 of 141
Fiction.LiveBench53%#40 of 58
SimpleBench40%#62 of 89
DeepSeek's past year
9 release days in the past year, about one every 41 days. The next is expected around Nov 28, 2026. Forecasts ↗
NovDecJanFebMarAprMayJunJulAugSepOctNov
Specifications
RELEASE DATEAug 21, 2025
WEIGHTSOpen weights
CONTEXT WINDOW131.1K
MAX OUTPUT8.2K
REASONINGNot listed
TOOL CALLINGNot listed
INPUTStext
OUTPUTStext
Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.