DeepSeek V3.1
deepseek/deepseek-chat-v3.1
DeepSeek V3.1 is a text-only model from DeepSeek with a context length of 163,840 tokens. It supports tool usage and reasoning, offers open weights, and is priced at $0.25 per million input tokens and $0.95 per million output tokens. The model was released on August 21 2025.
- tool use
- structured outputs
- reasoning
- open-weight
At a glance
providerdeepseek
releasedAug 21, 2025
context164K
input / M$0.25
Specifications
What the API gives you
- Context window
- 164K tokens
- Max output
- 33K tokens
- Input price
- $0.25 / 1M tokens
- Output price
- $0.95 / 1M tokens
- Cache read
- $0.13 / 1M tokens
- Modalities
- text → text
- Knowledge cutoff
- Mar 31, 2025
- Released
- Aug 21, 2025
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Measured evidence
Public benchmark record
- LMArena Text
- 1419 Elo2026-07-16
LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open.
Open-weight model on Hugging Face.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.