Top Free Generative AI APIs, Open Source models, and tools

Top Free Generative AI APIs, Open Source models, and tools

What is Generative AI API

Generative AI APIs are powerful interfaces that unlock the capabilities of cutting-edge artificial intelligence models trained to generate new, original content across various modalities. These APIs democratize access to advanced generative AI models, allowing developers and businesses to seamlessly integrate content generation capabilities into their applications without the need for extensive machine learning expertise or resources to train complex models from scratch.

By leveraging the power of large language models, computer vision algorithms, and other AI techniques, generative AI APIs enable the creation of human-like text, realistic images, functional code, and engaging conversational experiences, among other possibilities.

Generative AI Technologies with their top Open Source (Free) models on the market

Text Generation

Text generation APIs harness the power of large language models, which have been trained on vast amounts of textual data, to generate human-like written content. These APIs can produce contextually relevant and coherent text for a wide range of applications, including content creation, summarization, creative writing, and conversational agents. With the ability to mimic various writing styles and tones, text generation APIs can generate compelling articles, stories, product descriptions, marketing copy, and even poetry or scripts, tailored to specific requirements and prompts.

Text Generation on Eden AI

Top Open Source (Free) Text Generation models on the market

Falcon 180B

Falcon 180B is an advanced language model featuring 180 billion parameters. It is open source, providing free access to its powerful capabilities. Falcon 180B excels in various natural language processing tasks, offering exceptional performance in generating high-quality text. This model is renowned for its top-tier performance and high accuracy, making it one of the leading options in the field of text generation.


Developed by Meta, boasts 175 billion parameters and is one of the largest pre-trained language models available. As an open-source model, it excels in generating coherent and contextually relevant text, making it a robust tool for diverse applications. Its significant parameter count ensures high efficiency and strong performance, providing substantial utility for advanced text generation tasks.


A versatile language model with 20 billion parameters. It is open source and designed to handle a wide range of English-language texts. The model closely resembles GPT-3 in architecture and functionality, offering reliable performance for general-purpose text generation. Its general-purpose nature and extensive training make it a strong performer in various contexts.


GPT-3 is known for its remarkable text generation abilities, leveraging 175 billion parameters to produce human-like text. While not entirely open source, it offers free access through OpenAI's API, making it widely used. GPT-3's high accuracy and performance make it a standout in various text generation tasks, known for generating text that is coherent and contextually appropriate.


GPT-J, created by EleutherAI, features 6 billion parameters and is designed to generate human-like text continuations. This open-source model efficiently maintains context and coherence, making it a strong performer for many use cases. Its ease of access and implementation are notable strengths, providing a reliable option for developers needing a robust text generation tool.


Created by Salesforce AI Research is a compact yet powerful model with 7 billion parameters, designed for versatile text generation and natural language processing tasks. It handles up to 8,000 tokens of input and is trained on a 1.5 trillion token dataset, offering robust performance. Released under the Apache 2.0 license, it is fully open source and highly efficient for its size [1].


BLOOM is a multilingual language model supporting 46 languages and 13 programming languages. This open-source model utilizes extensive text data and advanced computational resources to generate coherent and contextually appropriate text. Its versatility in handling multiple languages is a strong point, making it a valuable tool for global applications.

Meta LLAMA Models

LLAMA models are designed for a variety of natural language processing tasks and are fully open source. These models provide flexible usage options for research and non-commercial applications, ensuring reliable performance across different scenarios. Their open-source nature allows for extensive customization and adaptation to specific needs.

PaLM 2 

PaLM 2 from Google is a state-of-the-art language model excelling in advanced reasoning, coding, and mathematics. Although not fully open source, it provides free access, making it accessible for various applications. PaLM 2's high performance in specialized tasks makes it a valuable tool for text generation, especially in contexts requiring advanced analytical capabilities.

Microsoft Phi-2 

Microsoft Phi-2 aims to generate high-quality text with efficient computation. While specific details about its parameters are less documented, it is recognized for its decent performance and is fully open source. Its open-source status ensures accessibility and the ability to tailor its use to specific requirements, providing flexibility for developers.

Apple OpenELM 

It is a new open-source model introduced by Apple, designed to generate text efficiently and accurately. As part of Apple's broader efforts in open-source AI models, OpenELM offers transparency and reproducibility in large language models. Its emerging capabilities show promising potential for various applications in natural language generation

Image Generation

Image generation APIs revolutionize content creation by enabling users to generate highly realistic or artistic images from textual descriptions. These APIs leverage advanced computer vision and generative adversarial network (GAN) models trained on massive datasets of images and their corresponding textual descriptions. By providing a textual prompt, users can generate original, high-quality images that can be used in various sectors, such as marketing, design, entertainment, and e-commerce, streamlining the content creation process and unlocking new creative possibilities.

Image Generation on Eden AI

Top Open Source (Free) Image Generation models on the market

DeepFloyd IF

DeepFloyd IF is an advanced open-source model developed by the DeepFloyd research team and backed by Stability AI. It excels in generating realistic visuals with a deep understanding of language, featuring a modular design with a fixed text encoder and three interconnected pixel diffusion modules, making it a highly versatile and powerful free open-source model for various image generation tasks.

Stable Diffusion v1-5

Stable Diffusion v1-5 is a free open-source latent text-to-image model that combines an autoencoder with a diffusion model to produce highly realistic images. Trained on the extensive laion-aesthetics v2 5+ dataset and fine-tuned over 595k steps, this model can generate lifelike images from diverse text inputs, offering great flexibility and quality in image creation as an open-source solution.


OpenJourney is a free open-source model designed to generate AI art in the style of Midjourney. Created by PromptHero, it utilizes a dataset of over 124k Midjourney v4 photos. OpenJourney is highly popular and ranks as the second most downloaded text-to-image model on HuggingFace, known for its ability to produce high-quality artistic images as an open-source offering.


DreamShaper V7 is a free open-source model built on the diffusion model architecture, introducing enhancements in LoRA support and realism. It builds on the updates of Version 6, which included improved style and superior generation at a 1024-pixel height. DreamShaper is known for creating photorealistic images and excels in anime-style generation with booru tags as an open-source solution.


Craiyon, formerly known as DALL-E mini, is a free AI image generator API that allows users to create unique images from text prompts. It is highly accessible and user-friendly, making it a popular choice for generating AI art through its free API service.
While Craiyon initially allowed users to clone the GitHub repository and run the model locally, the developers have shifted their focus to the web-based platform, making the website the primary means of accessing the latest version of the model.


Civitai is an open-source platform dedicated to sharing and rating Stable Diffusion models, textual inversions, aesthetic gradients, and other generative AI tools for creating images. It fosters a collaborative community where users can discover, download, and contribute their own customized models and resources, enhancing the overall quality and diversity of generative AI models as a free open-source platform.

Code Generation

Code generation APIs leverage AI models trained on vast repositories of code to generate code snippets or entire programs based on natural language descriptions or specifications. These APIs can assist developers by automating repetitive coding tasks, generating boilerplate code, and even creating complete applications from high-level requirements. By understanding natural language descriptions and translating them into functional code, code generation APIs can significantly accelerate software development processes, reduce coding errors, and enable non-technical users to create software applications through natural language interfaces.

Code Generation on Eden AI

Top Open Source (Free) Code Generation models on the market

Llama 3 70B Instruct

Llama 3 70B Instruct is part of Meta's Llama 3 family, a collection of large language models designed for various tasks, including code generation. This model is known for its high performance and versatility, supporting a broad range of applications such as text generation, code generation, and natural language processing. With 70 billion parameters, it leverages advanced techniques to optimize for helpfulness and safety in its responses. The model is pre-trained and instruction-fine-tuned to enhance its capability in providing accurate and relevant outputs.


CodeGeeX is a powerful open-source multilingual code generation model with 13 billion parameters. It has been pre-trained on a massive corpus of 850 billion tokens across 23 programming languages, making it highly versatile and capable of generating code in multiple languages. CodeGeeX excels in tasks such as code generation, translation, and explanation, and has been extensively tested and evaluated. It offers unique features like a customizable programming assistant and the ability to translate code across languages.


CodeBERT is an open-source language model specifically adapted for code-related tasks. It is a pre-trained multilingual model trained on Natural Language to Programming Language pairs in six programming languages: Python, Java, JavaScript, PHP, Ruby, and Go. CodeBERT's specialized training on code-related data makes it well-suited for tasks such as code generation, code summarization, and code translation.


CodeT5 is an open-source transformer-based model tailored for code-related tasks such as code summarization, code generation, and code completion. Developed by Salesforce AI Research, it is designed to understand and generate code in various programming languages. CodeT5 leverages a code-aware encoder-decoder architecture, making it adept at handling diverse code generation challenges. Its pre-training involves a large corpus of code, enabling it to offer high-quality code completions and insights.


free-gpt-engineer is an open-source AI model designed for generating entire codebases based on prompts. It is flexible and expandable, allowing users to specify what they want to create, and the AI will request clarification before generating the code. free-gpt-engineer is capable of learning and adapting to the desired code format, making it a versatile tool for code generation tasks.


Developed by Hugging Face, CodeParrot is an open-source model aimed at code generation. It is trained on a large corpus of programming language data, enabling it to generate accurate and relevant code snippets. CodeParrot excels in converting natural language descriptions into code, making it a useful tool for developers looking to automate coding tasks. Its training on diverse datasets allows it to handle various programming languages and code structures effectively.


PolyCoder is an open-source model for code generation that is trained on a vast dataset of code from multiple programming languages. It aims to provide high-quality code completions and suggestions, making it a reliable assistant for developers. PolyCoder's extensive training enables it to understand complex code contexts and offer relevant code snippets, reducing the time and effort required for manual coding.


Django-code-generator is an open-source tool specifically designed for generating code within the Django web framework. It allows users to create Django Rest Framework APIs or admin interfaces for their applications based on Django models. Additionally, users can shape templates to generate custom code tailored to their specific needs, making it a useful tool for Django developers.


Duckargs is a free open-source tool that helps developers save time when creating Python or C programs that receive input from the command line. By executing duckargs (for Python code), duckargs-python (also for Python), or duckargs-c (for C code) and specifying the desired options and example values, Duckargs generates a program capable of handling those options and arguments, reducing the need for manual boilerplate code.

Chatbot Generation

Chatbot generation APIs provide access to language models that have been fine-tuned specifically for conversational use cases. These APIs enable the creation of intelligent chatbots and virtual assistants capable of engaging in human-like dialogue, understanding context, and providing relevant responses. By leveraging natural language processing and generation techniques, chatbot generation APIs can power conversational interfaces across various industries, such as customer service, e-commerce, and education, enhancing user experiences and enabling more natural and efficient interactions between humans and machines.

Chat Generation on Eden AI

Top Open Source (Free) Chat Generation models on the market

Llama 2-Chat

Llama 2-Chat is a fine-tuned version of the Llama 2 model, ranging from 7 billion to 70 billion parameters. It has been optimized for dialogue use cases through supervised learning and reinforcement learning with human feedback (RLHF), enhancing its performance in conversational contexts while promoting safety and helpfulness.


OpenChat is an open-source library of language models fine-tuned with a strategy inspired by offline reinforcement learning, called C-RLFT. The models are designed to perform well in conversational settings, with the 7B model capable of running on consumer GPUs and delivering performance on par with ChatGPT, while being available for commercial use.

Mistral 7B

Mistral 7B is part of the Mistral family of open-source models known for their efficiency and high performance across various NLP tasks, including dialogue. The 7B model has been specifically fine-tuned for chat applications, making it a suitable choice for building conversational AI systems.

Qwen 1.5-Chat

Qwen 1.5-Chat is a fine-tuned version of the Qwen 1.5 model developed by Alibaba Cloud. It supports multiple languages and has been optimized for conversational use cases through advanced techniques like Direct Preference Optimization (DPO) and Proximal Policy Optimization (PPO) for fine-tuning.

Yi 34B-Chat

Yi 34B-Chat is a fine-tuned version of the Yi model series developed by 01.AI, designed specifically for chat applications. It supports a large context window, making it suitable for complex conversational tasks, and delivers high performance across multiple languages.

Cons of Using Open Source AI models

Although open-source AI models offer numerous benefits, they also present certain drawbacks and hurdles. Here are some disadvantages of utilizing open-source models:

  • Not Entirely Cost Free: While the models themselves may be freely available, users often incur costs for hosting, computing resources, and infrastructure, especially when working with large or resource-intensive datasets.
  • Lack of Support: Open-source models typically lack official support channels or dedicated customer service teams. Users may have to rely on community forums or volunteer efforts for assistance, which can be less reliable than commercial support.
  • Limited Documentation: Some open-source models suffer from inadequate or outdated documentation, making it challenging for developers to fully understand and leverage the model's capabilities effectively.
  • Security Concerns: Open-source models can have security vulnerabilities, and addressing these issues may take longer compared to commercially supported models with dedicated security teams. Users need to actively monitor for security updates and patches.
  • Scalability and Performance: Open-source models might not be as optimized for performance and scalability as commercial counterparts. Applications requiring high performance or handling numerous requests may need additional optimization efforts.

Why choose Eden AI?

Given the potential costs and challenges related to open-source models, one cost-effective solution is to use APIs. Eden AI smoothens the incorporation and implementation of AI technologies with its API, connecting to multiple AI engines.

Eden AI presents a broad range of AI APIs on its platform, customized to suit your needs and financial limitations. These technologies include data parsing, language identification, sentiment analysis, logo recognition, question answering, data anonymization, speech recognition, and numerous other capabilities.

To get started, we offer free credit for you to explore our APIs.

Eden AI App

Access Generative AI providers with one API

Our standardized API enables you to integrate Generative AI APIs into your system with ease by utilizing various providers on Eden AI. Here is the list (in alphabetical order):

Text Generation Providers

  • Anthropic
  • Cohere
  • Meta
  • Mistral
  • OpenAI

Image Generation Providers

  • Amazon Titan
  • DeepAI
  • OpenAI’s Dall-E
  • Stability AI

Code Generation Providers

  • Google Generative AI
  • NLP Cloud
  • OpenAI

Chat Generation Providers

  • Anthropic
  • Cohere
  • Google
  • Meta
  • Mistral
  • OpenAI
  • Perplexity
  • Replicate

How can Eden AI help you?

Eden AI is the future of AI usage in companies: our app allows you to call multiple AI APIs.

Multiple AI Engines in one API -Eden AI

  • Centralized and fully monitored billing on Eden AI for Document Processing APIs
  • Unified API for all providers: simple and standard to use, quick switch between providers, access to the specific features of each provider
  • Standardized response format: the JSON output format is the same for all suppliers thanks to Eden AI's standardization work. The response elements are also standardized thanks to Eden AI's powerful matching algorithms.
  • The best Artificial Intelligence APIs in the market are available: big cloud providers (Google, AWS, Microsoft, and more specialized engines)
  • Data protection: Eden AI will not store or use any data. Possibility to filter to use only GDPR engines.

You can see Eden AI documentation here.

Next step in your project

The Eden AI team can help you with your Document Processing integration project. This can be done by :

  • Organizing a product demo and a discussion to understand your needs better. You can book a time slot on this link: Contact
  • By testing the public version of Eden AI for free: however, not all providers are available on this version. Some are only available on the Enterprise version.
  • By benefiting from the support and advice of a team of experts to find the optimal combination of providers according to the specifics of your needs
  • Having the possibility to integrate on a third-party platform: we can quickly develop connectors.

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