DeepSeek
DeepSeek's open-source LLMs (V3 and R1) match GPT-4 class performance at a fraction of the cost ($0.27/M tokens). DeepSeek-R1 is particularly strong for reasoning, math, and code. The models are fully open-weight, meaning you can self-host for complete privacy. Best for developers who want frontier-class AI without frontier-class costs.
AI ToolFree Tier: Open weights (MIT license); API at $0.27/M tokensCompany: DeepSeekCategory: Git ReposOpen Source: YesQuick Start: Self-host via Ollama: ollama pull deepseek-r1 → Or use the API at platform.deepseek.com → Use the OpenAI-compatible API formatVisit DeepSeek