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DeepSeek
by DeepSeek
"GPT-class reasoning at open-source prices."
Chinese open-weight model that matches frontier labs on math and code — free on the web, and ~10–20× cheaper than GPT on API.
Overview
DeepSeek is a free, strong reasoning chatbot from China. Good for maths, planning, and step-by-step thinking at no cost.
How to use it
· 4 steps- 1
Open chat.deepseek.com and sign in.
- 2
Turn on DeepThink for harder questions.
- 3
Ask for calculations, plans or comparisons.
- 4
Avoid pasting private customer data.
Best-practice prompts
Prompt 1
Bundle pricing
My cost is RM12 per item, platform fee 8%, shipping subsidy RM3. Suggest 3 bundle prices (1, 3, 5 pieces) that keep at least 30% profit and look attractive.
Why it works · Step-by-step maths you can check.
Best for
- Cheap high-volume API calls
- Math & competition-level reasoning
- Chinese + English bilingual work
- Self-hosting the open weights
Not for
- —Politically sensitive topics (soft-filtered)
- —Image generation
Pricing
| Web Chat | Free | V3 + R1 reasoning, unlimited |
| API — chat | $0.27/M in · $1.10/M out | Cache hits ~10× cheaper |
| API — reasoner | $0.55/M in · $2.19/M out | R1 chain-of-thought |
Pro tips
- →Toggle 'DeepThink (R1)' for math/logic; leave off for speed.
- →The weights are open — you can run V3 locally on a big GPU.
- →Great translator between English ↔ Simplified Chinese for docs.