Build Custom AI Tools with Claude and ChatGPT APIs — WalkSelf
4.6 (18) ⏱ 2h 42m 📚 27 lessons

Build Custom AI Tools with Claude and ChatGPT APIs

Start integrating modern language models into your projects by mastering API basics, prompt engineering, and fundamental code patterns.

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About this course

Artificial intelligence is transforming software, but you do not need to be a machine learning expert to build AI-powered applications. By leveraging APIs, you can embed powerful language models directly into your own custom tools. This foundational text-based course guides you through the essentials of connecting to Claude and ChatGPT. You will start with basic terminology, understanding how APIs work, and progress to writing the code required to send prompts and process AI responses. Through written explanations and clear code snippets, you will gain the confidence to build your own intelligent text-processing scripts. What you will learn: Understand core API concepts, JSON data formatting, and authentication basics; Write fundamental code to send requests and receive responses from Claude and ChatGPT; Apply modern prompt engineering techniques to get reliable, structured outputs; Explore fundamental Retrieval-Augmented Generation (RAG) patterns for contextual AI responses; Practice handling asynchronous API calls and managing rate limits effectively. The curriculum flows logically from foundational definitions to practical implementation. You will read through step-by-step written guides and examine realistic code examples that you can adapt for your own projects. Designed entirely for beginners and developers new to AI integration, this course requires no prior machine learning experience. Start reading today to unlock the potential of AI APIs and bring your custom tool ideas to life.

What you'll get

  • 📜 Certificate of completion
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  • 💬 Personal AI tutor
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  • 📱 Phone or computer
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  • 💸 14-day refund
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  • Short & focused
    2h 42m of practical content

Reviews (18)

Sakura Yamamoto KE
★ 5 · July 29, 2026

What stood out to me was how the course treats Claude and ChatGPT side by side instead of picking a favorite. You get to see the same tool built with both APIs, which made the tradeoffs click for me instantly. By the end I had a working assistant that switches between models depending on the task.

Emma Ferri IT
★ 5 · July 14, 2026

Corso completo e ben organizzato per chi vuole costruire strumenti AI personalizzati usando sia Claude che ChatGPT. Gli esempi pratici mostrano davvero come strutturare le chiamate e gestire i prompt in modo efficace. Sono riuscito a creare un piccolo assistente funzionante già durante il corso.

Şerife Çetin TR Verified learner
★ 5 · July 13, 2026

Claude ve ChatGPT API'lerini aynı kursta karşılaştırmalı öğrenmek gerçekten fark yaratıyor. Anlatım akıcı ve örnekler gerçek hayattan seçilmiş, sıkılmadan takip ettim. Kurs sonunda kendi küçük AI aracımı sıfırdan yazabildim.

Matilde Santoro IT Verified learner
★ 4 · July 12, 2026

Ho seguito questo corso per capire meglio come integrare Claude e ChatGPT nello stesso progetto, e devo dire che l'approccio comparativo è stato davvero utile. Le lezioni sono organizzate bene, si parte dalle chiamate API di base per poi arrivare a costruire strumenti più complessi. Mi è piaciuto molto vedere gli stessi esempi replicati su entrambe le API, così si capiscono davvero le differenze pratiche. L'unico punto debole secondo me è che la parte finale sul deployment è un po' troppo veloce rispetto al resto. Nel complesso però sono uscito dal corso con un tool funzionante e con le idee molto più chiare.

田中 健一 JP
★ 5 · July 9, 2026

ClaudeとChatGPTのAPIを使って自分専用のツールを作る、という目標がこの講座でやっと現実になりました。APIの基本から丁寧に始まるので、コードにそれほど自信がない私でもつまずかずに進められました。プロンプトエンジニアリングの章で、指示の書き方ひとつで出力の質がここまで変わるのかと驚きました。基本的なコードパターンを真似しながら、社内向けの要約ツールを実際に組み上げられたのが一番の収穫です。両方のモデルを比べながら学べる構成も実践的でよかったです。これから自分のアイデアをツールにしたい人に強くおすすめします。

Björn Ólafsson IS Verified learner
★ 4 · July 9, 2026

I appreciated that this course doesn't just focus on one API but shows you how to work with Claude and ChatGPT interchangeably. The prompt design section was genuinely useful for real projects. My only gripe is that the error handling examples felt a bit rushed toward the end.

Yishai Tzur IL Verified learner
★ 5 · July 3, 2026

Practical, well-paced, learned a ton.

Sophie Dubois FR Verified learner
★ 5 · July 2, 2026

Excellent cours pour apprendre à construire des outils IA en combinant les API de Claude et ChatGPT.

Lorenzo Conti IT Verified learner
★ 4 · July 2, 2026

Utile ma un po' denso a tratti.

Budi Santoso ID Verified learner
★ 5 · June 29, 2026

Kursus ini benar-benar membuka wawasan saya tentang cara kerja API Claude dan ChatGPT secara bersamaan. Penjelasan tentang perbedaan gaya prompt di antara kedua model sangat membantu. Saya jadi bisa membangun tool AI kecil sendiri untuk pekerjaan sehari-hari.

مريم بنت حسن EG
★ 5 · June 28, 2026

دورة رائعة توضح الفرق بين واجهتي Claude وChatGPT بطريقة عملية وسهلة الفهم.

Aiman Hakim bin Mohd Yusof MY
★ 4 · June 26, 2026

Kursus ini membantu saya faham perbezaan antara API Claude dan ChatGPT dengan cara yang praktikal. Contoh projek yang digunakan memang berguna untuk latihan sebenar. Cuma bahagian tentang pengurusan token rasa agak pantas untuk pemula.

Mia Dela Cruz PH Verified learner
★ 5 · June 24, 2026

Malinaw ang pagtuturo, natutunan ko agad kung paano gamitin ang parehong Claude at ChatGPT API sa isang proyekto.

Serpil Balcı TR Verified learner
★ 4 · June 21, 2026

Claude ve ChatGPT API'lerini birlikte öğretmesi güzel ama bazı bölümler biraz hızlı geçiliyor.

Gustav Karlsson SE Verified learner
★ 4 · June 18, 2026

Good comparison of Claude and ChatGPT API workflows, though I wish there was more on cost optimization.

Emma Simon FR Verified learner
★ 4 · June 12, 2026

Bon contenu, rythme un peu inégal.

Hannah Hoffmann CH
★ 5 · May 28, 2026

Sehr gut erklärt, wie man Claude und ChatGPT APIs kombiniert, um eigene Tools zu bauen.

শামীমা সুলতানা BD Verified learner
★ 5 · May 25, 2026

এই কোর্সটা আমার জন্য একদম নতুন একটা দুনিয়া খুলে দিয়েছে, কারণ আগে আমি শুধু একটা API নিয়ে কাজ করতাম আর এখানে Claude আর ChatGPT দুটোই একসাথে শেখানো হয়েছে। প্রতিটা লেসন খুব গোছানো, প্রথমে বেসিক কল দেখানো হয় তারপর ধীরে ধীরে আরও জটিল টুল বানানো শেখানো হয়। প্রম্পট লেখার কৌশলগুলো এত পরিষ্কারভাবে বোঝানো হয়েছে যে আমি সহজেই নিজের প্রজেক্টে প্রয়োগ করতে পেরেছি। উদাহরণগুলো বাস্তব জীবনের সমস্যা থেকে নেওয়া, তাই একঘেয়ে লাগেনি। কোর্স শেষ করার পর আমি নিজের একটা ছোট AI টুল বানিয়ে ফেলেছি যেটা দুটো মডেলের মধ্যে সুইচ করতে পারে।

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