March 2025
Intermediate to advanced
296 pages
6h 58m
Portuguese (Portugal, Brazil)
Content preview from Aprende a usar a LangChain
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Prefácio
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
Em 30 de novembro de 2022, a empresa sediada em São Francisco OpenAI lançou publicamente o ChatGPT - ochatbot de IA viral que pode gerar conteúdo, responder a perguntas e resolver problemas como um humano. Dois meses após o seu lançamento, o ChatGPT atraiu mais de 100 milhões de utilizadores activos mensais, a taxa de adoção mais rápida de uma nova aplicação de tecnologia de consumo (até agora). O ChatGPT é uma experiência de chatbot alimentada por uma versão ajustada às instruções e ao diálogo da família GPT-3.5 da OpenAI de grandes modelos de linguagem (LLMs). Em breve, abordaremos as definições destes conceitos.
Nota
Para construir aplicações LLM, com ou sem LangChain, é necessário o uso de um LLM. Neste livro, usaremos a API OpenAI como o provedor de LLM que usamos nos exemplos de código (o preço está listado na sua plataforma). Um dos benefícios de trabalhar com LangChain é que podes seguir todos estes exemplos usando tanto o OpenAI como fornecedores alternativos de LLM comerciais ou de código aberto.
Três meses mais tarde, a OpenAI lançou a API ChatGPT, dando aos programadores acesso às capacidades de conversação e de conversão de voz em texto. Isto deu início a um número incontável de novas aplicações e desenvolvimentos técnicos sob o termo genérico de IA generativa.
Antes de definirmos a IA generativa e os LLMs, vamos abordar o conceito de
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.