DeepSeek V4.1 Reasoning
DeepSeek's reasoning model for math and logic
free access available
- Context
- 128,000 tokens
- Type
- Reasoning
- Input
- Text
- Developer
- DeepSeek AI
- Strengths
- Math, logic
- Access
- ChatPlus PRO
DeepSeek V4.1 Reasoning is a model focused on step-by-step reasoning. It is especially strong in math, logic and tasks where it pays to "think" before answering. It shows its chain of reasoning and solves complex technical problems well.
The reasoning variant is built for tasks where you really need to think, not just answer. It breaks a problem into steps and works through them, showing its reasoning — so in math, logic and algorithms it has few equals.
The flip side of that approach is that it isn't the fastest: a hard question takes time, because the model really does "reason" before answering. But what you get is a breakdown, not a guess.
If the task is a proof, a tricky logic puzzle or an algorithm analysis, DeepSeek V4.1 Reasoning is worth trying first.
What it's good at
Reasoning
Breaks complex tasks into steps before answering.
Math
One of the strongest models at calculation and proofs.
Logic
Good at tasks that require rigorous conclusions.
Code
Solves algorithmic and engineering problems.
DeepSeek V4.1 Reasoning and every other model — one plan, one window.
Where it's strongest
DeepSeek next to the others
How DeepSeek V4.1 Reasoning and the flagships of other labs look side by side. They're all in one ChatPlus subscription.
| Claude | DeepSeek | GPT | Gemini | Grok | GLM | Kimi | Qwen | Muse | GLM 5.3 Flash | |
|---|---|---|---|---|---|---|---|---|---|---|
| Developer | Anthropic | DeepSeek | OpenAI | xAI | Z.ai | Moonshot | Alibaba | Meta | Z.ai | |
| Model | Sonnet 4.6 | DeepSeek V4.1 Reasoning | GPT-6 Astra | Gemini 3 Pro | Grok 4 | GLM 5 | Kimi K3 | Qwen 3.8 Max | Muse Spark 1.3 | GLM 5.3 Flash |
| Context | 200K | 128K | 1M | 1M | 256K | 1M | 256K | 256K | 1M | 1M |
| Understands images | — | — | ||||||||
| Live web data | — | — | — | — | — | — | — | |||
| Open source | — | — | — | — | — | |||||
| Key strength | Text and code | Reasoning | Computer use | Multimodality | Timeliness | Code and agents | Long context | Complex tasks | Agents and code | Code and agents |
| On ChatPlus |