DeepSeek V4
DeepSeek V4 is a DeepSeek model family with 2 variants (Pro and Flash) available in Quad Chat, with up to 1M tokens of context, tool calling and step-by-step reasoning.
DeepSeek V4 at a glance
| Lab | DeepSeek |
|---|---|
| Available on | Free plan |
| Context window | Up to 1M tokens |
| Max output | Up to 384K tokens |
| Image input | No |
| Tool calling | Yes |
| Reasoning | Yes |
| Privacy lane | Private (Zero Data Retention) |
DeepSeek V4 variants
| Model | Context | Plan | API list price per 1M tokens (in / out) |
|---|---|---|---|
| DeepSeek V4 Pro | 1M | Free plan | $0.66 / $1.98 |
| DeepSeek V4 Flash | 1M | Free plan | $0.076 / $0.15 |
How to use DeepSeek V4 in Quad Chat
- Create a free account or sign in.
- Open the model picker and choose DeepSeek V4.
- Ask, attach files, or compare the answer with another model.
Frequently asked questions
Can I use DeepSeek V4 for free?
Yes. DeepSeek V4 is available on the Quad Chat Free plan, which needs no credit card and includes 100 monthly credits shared across every model. Larger requests use more credits, and paid plans from $8/month raise the allowance.
What is the context window of DeepSeek V4?
Context windows differ by variant: DeepSeek V4 Pro 1M, DeepSeek V4 Flash 1M tokens, according to the model catalog Quad Chat routes through. Files, pasted text and earlier messages all count toward the window.
Does DeepSeek V4 support images, tools and reasoning?
DeepSeek V4 works with text input only; pick a vision model in the same chat when you need to attach images. It supports tool calling. It can reason step by step before it answers. You can switch to another model in the same conversation at any time.
Is DeepSeek V4 private in Quad Chat?
DeepSeek V4 runs on the Quad Chat Private Lane, routed to providers under Zero Data Retention terms. Quad Chat does not train models on your conversations, encrypts chats in transit and at rest, and lets you export or delete them at any time.
How much does DeepSeek V4 cost in Quad Chat?
Quad Chat plans have a flat monthly price and draw usage from shared credits, not a per-token bill. The model picker shows an estimate before you send. For reference, the provider's API list price is from $0.076 to $0.66 per million input tokens across variants.
Can I compare DeepSeek V4 with other models?
Yes. Send one prompt to DeepSeek V4 and one or two other models, such as DeepSeek V4.1 Flash, DeepSeek V3.2 and GPT-6.1 Sol, and compare the answers side by side in the same thread. You can also switch models mid-conversation without losing your files or context.
Related models
- DeepSeek V4.1 Flash — DeepSeek, Free plan
- DeepSeek V3.2 — DeepSeek, Free plan
- GPT-6.1 Sol — OpenAI, Pro plan and up
- Gemini 3.8 Flash — Google, Pro plan and up
- Claude Opus 5.5 — Anthropic, Ultra plan and up
- Kimi K3 — Moonshot AI, Free plan
- Muse Spark 1.3 — Meta, Free plan
- Inkling — Thinking Machines, Free plan