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DeepSeek vs. FastChat

LLM Comparison


DeepSeek

DeepSeek

Overview

DeepSeek currently offers V3 and R1 models, both of which are highly efficient and performant. V3 is comparable to models such as Anthropic's Sonnet 3.5, while R1 is comparable to models such as OpenAI's o1.


DeepSeek is a Chinese startup that began releasing LLMs in 2023 with DeepSeek Coder. In rapid succession, DeepSeek has since released more powerful models, most notably releasing DeepSeek V3 at the end of 2024 and DeepSeek R1 at the beginning of 2025. DeepSeek V3 and R1 set the frontier in terms of efficiency while maintaining high performance. The release of V3 and R1 sent shockwaves through the US technology sector, especially given the low cost with which V3 and R1 were trained (orders of magnitude less than the cost of training equivalent US models.)


Initial release: 2023-11-29

Further Reading

FastChat

FastChat

Overview

FastChat is the open platform for training, serving, and evaluating LLM chatbots developed and maintained by LMSYS.


FastChat is an open-source library for training, serving, and evaluating LLM chat systems from LMSYS. It includes training and evaluation code, a model serving system, a Web GUI, and a finetuning pipeline, and is the de facto system for Vicuna as well as FastChat-T5. FastChat also includes the Chatbot Arena for benchmarking LLMs.


Initial release: 2023-04-28

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More Comparisons

DeepSeek

FastChat
Products & Features
Instruct Models
Coding Capability
Customization
Finetuning
Open Source
License MIT Apache 2.0
Model Sizes 67B, 671B 3B

Other DeepSeek Comparisons

DeepSeek vs. Alpaca DeepSeek vs. Cerebras-GPT DeepSeek vs. Dolly DeepSeek vs. Falcon DeepSeek vs. FastChat DeepSeek vs. FLAN-T5 DeepSeek vs. FLAN-UL2 DeepSeek vs. Gemma DeepSeek vs. Gemma 2 DeepSeek vs. GPT-J DeepSeek vs. GPT4All DeepSeek vs. GPTNeo DeepSeek vs. Grok DeepSeek vs. Guanaco DeepSeek vs. Koala DeepSeek vs. LLaMA DeepSeek vs. Llama 2 DeepSeek vs. Llama 3 DeepSeek vs. Llama 3.1 DeepSeek vs. Llama 3.2 DeepSeek vs. Llama 3.3 DeepSeek vs. Mistral DeepSeek vs. MPT DeepSeek vs. OpenAssistant DeepSeek vs. OpenLLaMA DeepSeek vs. OPT DeepSeek vs. Orca DeepSeek vs. Phi DeepSeek vs. Pythia DeepSeek vs. Qwen DeepSeek vs. RedPajama-INCITE DeepSeek vs. StableLM DeepSeek vs. StableVicuna DeepSeek vs. Vicuna DeepSeek vs. WizardLM

Other FastChat Comparisons

FastChat vs. Alpaca FastChat vs. Cerebras-GPT FastChat vs. DeepSeek FastChat vs. Dolly FastChat vs. Falcon FastChat vs. FLAN-T5 FastChat vs. FLAN-UL2 FastChat vs. Gemma FastChat vs. Gemma 2 FastChat vs. GPT-J FastChat vs. GPT4All FastChat vs. GPTNeo FastChat vs. Grok FastChat vs. Guanaco FastChat vs. Koala FastChat vs. LLaMA FastChat vs. Llama 2 FastChat vs. Llama 3 FastChat vs. Llama 3.1 FastChat vs. Llama 3.2 FastChat vs. Llama 3.3 FastChat vs. Mistral FastChat vs. MPT FastChat vs. OpenAssistant FastChat vs. OpenLLaMA FastChat vs. OPT FastChat vs. Orca FastChat vs. Phi FastChat vs. Pythia FastChat vs. Qwen FastChat vs. RedPajama-INCITE FastChat vs. StableLM FastChat vs. StableVicuna FastChat vs. Vicuna FastChat vs. WizardLM

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