ChatGPT
OpenAIThe best-known general-purpose AI assistant: writing, analysis, code, images and web search in a single interface.
The lab that shook the market: frontier-level open-weight models (MIT license) at a fraction of the usual cost.
Pricing
Freemium
Platforms
Web, API, Mobile
Publisher
Origin
China · 2023
DeepSeek became famous overnight by proving that frontier-level models could be trained at a fraction of the expected cost — and released with open weights under an MIT license. Its R1 reasoning models and V3 general models power a free assistant and one of the cheapest APIs on the market. For teams wanting to self-host a top-tier model, DeepSeek is a reference choice.
€0
usage-based
€0 (MIT weights)
Prove that the sum of the first n odd numbers equals n². Show your reasoning step by step, then give a one-line intuitive explanation a high-schooler would understand.
Here is a function that is too slow [paste]. Reason through its time complexity, identify the bottleneck, and propose an optimized version with the new complexity.
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