LLMOpen weights
DeepSeek-V3.1
DeepSeek
Updated May 21, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by DeepSeek-V3.2
Specifications
- Type
- LLM
- Access
- Open weights
- Released
- August 21, 2025
- License
- MIT
- Parameters
- 671B (37B active)
- Context window
- 163,840 tokens
- Knowledge cutoff
- March 31, 2025
- Input
- Text
- Output
- Text
- API pricing
- $0.21 in · $0.79 out / 1M tokens
Capabilities
Function callingStructured output
Benchmarks
Our take
First DeepSeek “hybrid” model serving both thinking and non-thinking modes from one set of weights, positioned as a step toward agentic use.