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Powerful open-weight reasoning, free in the app and dirt-cheap via API.
Pros
- Completely free consumer chat with no premium paywall
- Open weights enable self-hosting and customization
- Extremely cheap API pricing
Cons
- Data hosted in China raises privacy/compliance concerns
- Fewer polished productivity features and integrations
- Content restrictions on politically sensitive topics
✓ Where it shines / best for
- Cost-sensitive developers building on a cheap API
- Users wanting strong reasoning/coding for free
- Teams wanting self-hostable open weights
✕ Not the best fit for
- Organizations with strict data-residency requirements
- Users needing rich integrations or enterprise governance
- Those needing image/video generation
Features
- ✓ DeepSeek V4 Flash default chat model
- ✓ DeepThink reasoning mode (V4 thinking / R-series)
- ✓ Free web and mobile chat with no paywall
- ✓ File uploads and long conversations free
- ✓ Open-weight models available for self-hosting
- ✓ Very low-cost API with aggressive cache discounts
- ✓ Web search grounding
- ✓ Strong math and coding performance
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Chat App (Free) | $0 | monthly | Free web/app access; V4 Flash + DeepThink, no paywall |
| API - V4 Flash | $0.14 / $0.28 per 1M tokens | usage | Input/output; cache hits ~$0.0028/1M (1/10 of launch price since Apr 26 2026) |
| API - V4 Pro | $0.435 / $0.87 per 1M tokens | usage | 75% promo until May 31 2026 15:59 UTC; reverts to $1.74/$3.48 per 1M after |
| API - R1 | $0.55 / $2.19 per 1M tokens | usage | Reasoning model; new accounts get free tokens |
Pricing verified from the official source. Prices change often — confirm on the vendor's site before buying.
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