DeepSeek builds high-performing open-weight models — the V3 series for general chat and coding and the R1 reasoning line — released under permissive licenses and offered through an unusually cheap API. There is also a free consumer chat app.

Highlights

Extremely low API pricing for the quality
Open weights you can self-host
Strong coding and reasoning performance
Free consumer chat app

Watch-outs

Data residency and privacy concerns for some organisations
Fewer product features than ChatGPT or Gemini
Smaller tooling and ecosystem

Good for

AI chat assistant AI code generation Low-cost LLM API

DeepSeek is the value play: if you are sending high volumes of LLM traffic and cost dominates, its API is dramatically cheaper than the incumbents, and open weights let you self-host. The trade-offs are ecosystem maturity and data- governance questions that matter to some organisations. For the cheapest credible API it is a first call; for a polished product experience, look to ChatGPT, Claude, or Gemini.

When to use it

cost_sensitive_api_builders
self_hosting_teams
high_volume_chat

Avoid if

have_strict_data_residency_requirements
want_a_polished_consumer_product

Free

Free tierOpen sourceAPI

Free web chat; API pricing is among the lowest available, with off-peak discounts. Weights are openly published for self-hosting.

Free tier
Native
API access
Native
SDKs
Integration
Open source
Native
AI assistance
Native

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DeepSeek

Highlights

Watch-outs

Good for

When to use it