6 Types of OpenAI API Models

OpenAI’s API models represent where the future of technology meets practical applications. These models are not just about creating tech buzz, they’re actively changing the way we work, create, and communicate.

In this article, we’ll guide these 6 types of OpenAI API models and explore what makes each of these models stand out.

ModelKey featuresPrimary applications
GPTAdvanced language processing, multilingual, contextual understandingContent creation, translation, education, and customer service
DALL·EImage generation from text, creative visual outputsCreative arts, graphic design, innovative visual content
TTSText-to-speech capabilities, human-like speechAudiobooks, voice assistants, accessibility tools, language learning
WhisperAdvanced speech recognition, supports multiple languagesTranscription, voice-controlled apps, language translation, accessibility
EmbeddingsText representations in high-dimensional space, semantic understandingSemantic search, text analysis, data categorization, machine learning
CodexAI for software development and coding, understands and generates programming codeAssisting in software development, automating coding tasks, educational tools for coding

1. GPT

Natural language processing and applications.

GPT (Generative Pre-trained Transformer) is an AI model designed for natural language tasks. Until now, it has upgraded models to GPT-4 and trained on extensive text data, enabling it to excel in tasks such as text completion, translation, summarization, and more. They have gained popularity for their remarkable ability to understand and generate human-like text based on input. 

You can ask the model any questions, write a book, or even translate to other languages. The GPT model is like a knowledgeable friend who excels in various domains. Moreover, it is also innovative in content creation, answering questions, and developing chatbots for customer services.


  • Improved language handling compared to older versions.
  • Multilingual support for users worldwide.
  • Enhanced understanding for smoother conversations.


Image generation from textual descriptions.

DALL·E has the remarkable ability to transform textual descriptions into realistic images and artwork. You just simply input the text, and then it will bring your text ideas to life through vivid visual representations. This model can be seen as a multifunctional tool that effectively supports marketing, advertising, and social media work.

Especially, the DALL·E 3 can create new images with specific dimensions, such as 16:9, 4:3, or 9:16 ratios, while the DALL·E 2 version allows for the editing of existing images and the generation of variations based on user-provided images.


  • Innovative image generation from text descriptions.
  • Harnessing GPT-3’s language understanding for creative visuals.
  • Versatile creation of diverse and unique images.
  • Substantial influence on creative and design fields.

3. Whisper

Speech recognition and language translation.

Whisper is a speech recognition model that can understand and transcribe spoken language. This model has been extensively trained as a multi-task model that is capable of performing tasks such as multilingual speech recognition and speech translation.

Moreover, it can translate from voice into different languages, which is highly beneficial for creating written records of meetings or conversations. This function is especially useful for individuals who need to comprehend or communicate in a language they are not fluent in as well. What a smart model!


  • Cutting-edge automatic speech recognition system.
  • Demonstrates exceptional accuracy in transcribing spoken language.
  • Offers support for multiple languages and dialects.
  • Adapts seamlessly to diverse audio conditions and speaking styles.

4. TTS

Effortless text-to-speech conversion.

TTS (Text-to-Speech) is a sophisticated AI model meticulously crafted to seamlessly convert textual content into human-like voice. OpenAI offers a comprehensive suite of TTS models to cater to diverse requirements, including tts-1, tailored for real-time text-to-speech applications, and tts-1-hd, meticulously engineered to prioritize and deliver an unparalleled level of audio quality.

The TTS models are designed to integrate seamlessly with the Speech endpoint within the Audio API, ensuring a frictionless experience for both developers and users. It can be applied across various domains, from voice assistants and audiobook narration to accessibility features and multimedia content narration, empowering developers to enhance user experiences with lifelike speech synthesis.


  • Advanced text-to-speech capabilities.
  • Generates human-like speech from text.
  • Versatile in tone and language adaptability.
  • Useful in various applications requiring speech output.

5. Embeddings

Embeddings are numerical representations of ideas transformed into sequences of numbers, allowing computers to discern connections between these ideas. Since the introduction of OpenAI, a lot of applications have integrated embeddings to personalize content, offer recommendations, and enhance content search capabilities.

This tool is invaluable for swiftly searching through vast amounts of text or efficiently organizing extensive collections of words into coherent groups. It proves highly beneficial for tasks such as improving search engine functionality or aiding applications in comprehending the context of discussions. More than that, Embeddings function as proficient librarians, swiftly categorizing and comprehending extensive vocabularies.


  • Advanced model for generating text representations in high-dimensional space.
  • Facilitates understanding of semantic relationships between words and phrases.
  • Enhances natural language processing tasks.
  • Supports a wide range of applications in text analysis and machine learning.

6. Codex

AI for software development and coding.

Codex is an AI system designed to automatically generate human-like computer code in response to natural language prompts. This system can process programming-related queries and produce code snippets, scripts, or even entire programs in various programming languages.

If you’re stuck on a coding problem, Codex can help you by suggesting solutions or even writing whole code sections for you. Whether you are building a new software or just a beginner. Codex is like having a smart coding assistant always ready to help.


  • Support multiple languages with code generation.
  • Ensure code consistency and boost software reliability.
  • Integrate into development environments.

Final thoughts

OpenAI’s API models were born to change how people think and help us solve problems quickly. They’re pushing us to be more creative and efficient in everything from chatting and designing to coding and organizing information. From GPT’s way with words to DALL·E’s picture-making magic, OpenAI’s API models can understand your ideas, and translating speech opens doors to new ways of doing things.

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Louis Muswell

Louis Muswell

Louis Muswell is the Founder of AI Discovery. He has over 10 years of experience in AI research and development. Louis has created an online platform for AI enthusiasts to explore the depths of artificial intelligence, making it accessible to everyone.