Best LLM API Providers for Stack AI

Find and compare the best LLM API providers for Stack AI in 2025

Use the comparison tool below to compare the top LLM API providers for Stack AI on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

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    Vertex AI Reviews

    Vertex AI

    Google

    Free ($300 in free credits)
    713 Ratings
    See Provider
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    Fully managed ML tools allow you to build, deploy and scale machine-learning (ML) models quickly, for any use case. Vertex AI Workbench is natively integrated with BigQuery Dataproc and Spark. You can use BigQuery to create and execute machine-learning models in BigQuery by using standard SQL queries and spreadsheets or you can export datasets directly from BigQuery into Vertex AI Workbench to run your models there. Vertex Data Labeling can be used to create highly accurate labels for data collection. Vertex AI Agent Builder empowers developers to design and deploy advanced generative AI applications for enterprise use. It supports both no-code and code-driven development, enabling users to create AI agents through natural language prompts or by integrating with frameworks like LangChain and LlamaIndex.
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    Snowflake Reviews

    Snowflake

    Snowflake

    $2 compute/month
    4 Ratings
    Snowflake offers a unified AI Data Cloud platform that transforms how businesses store, analyze, and leverage data by eliminating silos and simplifying architectures. It features interoperable storage that enables seamless access to diverse datasets at massive scale, along with an elastic compute engine that delivers leading performance for a wide range of workloads. Snowflake Cortex AI integrates secure access to cutting-edge large language models and AI services, empowering enterprises to accelerate AI-driven insights. The platform’s cloud services automate and streamline resource management, reducing complexity and cost. Snowflake also offers Snowgrid, which securely connects data and applications across multiple regions and cloud providers for a consistent experience. Their Horizon Catalog provides built-in governance to manage security, privacy, compliance, and access control. Snowflake Marketplace connects users to critical business data and apps to foster collaboration within the AI Data Cloud network. Serving over 11,000 customers worldwide, Snowflake supports industries from healthcare and finance to retail and telecom.
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    Perplexity Reviews
    Perplexity AI is a fast-answer search engine accessible for free via its website perplexity.at, as well as through desktop apps and mobile devices on iPhone and Android. This innovative search platform leverages large language models to deliver precise and context-aware responses to a wide range of questions. Built to handle both broad and detailed queries, Perplexity AI combines artificial intelligence with live search functionality to gather and summarize information from multiple sources. Emphasizing user-friendliness and transparency, it frequently includes citations or direct links to its reference materials. Its mission is to simplify the information-gathering process while ensuring responses are clear, accurate, and reliable—making it an essential resource for researchers and professionals alike.
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    OpenAI Reviews
    OpenAI aims to guarantee that artificial general intelligence (AGI)—defined as highly autonomous systems excelling beyond human capabilities in most economically significant tasks—serves the interests of all humanity. While we intend to develop safe and advantageous AGI directly, we consider our mission successful if our efforts support others in achieving this goal. You can utilize our API for a variety of language-related tasks, including semantic search, summarization, sentiment analysis, content creation, translation, and beyond, all with just a few examples or by clearly stating your task in English. A straightforward integration provides you with access to our continuously advancing AI technology, allowing you to explore the API’s capabilities through these illustrative completions and discover numerous potential applications.
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    Mistral AI Reviews
    Mistral AI stands out as an innovative startup in the realm of artificial intelligence, focusing on open-source generative solutions. The company provides a diverse array of customizable, enterprise-level AI offerings that can be implemented on various platforms, such as on-premises, cloud, edge, and devices. Among its key products are "Le Chat," a multilingual AI assistant aimed at boosting productivity in both personal and professional settings, and "La Plateforme," a platform for developers that facilitates the creation and deployment of AI-driven applications. With a strong commitment to transparency and cutting-edge innovation, Mistral AI has established itself as a prominent independent AI laboratory, actively contributing to the advancement of open-source AI and influencing policy discussions. Their dedication to fostering an open AI ecosystem underscores their role as a thought leader in the industry.
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    Claude Reviews
    Claude represents a sophisticated artificial intelligence language model capable of understanding and producing text that resembles human communication. Anthropic is an organization dedicated to AI safety and research, aiming to develop AI systems that are not only dependable and understandable but also controllable. While contemporary large-scale AI systems offer considerable advantages, they also present challenges such as unpredictability and lack of transparency; thus, our mission is to address these concerns. Currently, our primary emphasis lies in advancing research to tackle these issues effectively; however, we anticipate numerous opportunities in the future where our efforts could yield both commercial value and societal benefits. As we continue our journey, we remain committed to enhancing the safety and usability of AI technologies.
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    Hugging Face Reviews

    Hugging Face

    Hugging Face

    $9 per month
    Hugging Face is an AI community platform that provides state-of-the-art machine learning models, datasets, and APIs to help developers build intelligent applications. The platform’s extensive repository includes models for text generation, image recognition, and other advanced machine learning tasks. Hugging Face’s open-source ecosystem, with tools like Transformers and Tokenizers, empowers both individuals and enterprises to build, train, and deploy machine learning solutions at scale. It offers integration with major frameworks like TensorFlow and PyTorch for streamlined model development.
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    Replicate Reviews
    Replicate is a comprehensive platform designed to help developers and businesses seamlessly run, fine-tune, and deploy machine learning models with just a few lines of code. It hosts thousands of community-contributed models that support diverse use cases such as image and video generation, speech synthesis, music creation, and text generation. Users can enhance model performance by fine-tuning models with their own datasets, enabling highly specialized AI applications. The platform supports custom model deployment through Cog, an open-source tool that automates packaging and deployment on cloud infrastructure while managing scaling transparently. Replicate’s pricing model is usage-based, ensuring customers pay only for the compute time they consume, with support for a variety of GPU and CPU options. The system provides built-in monitoring and logging capabilities to track model performance and troubleshoot predictions. Major companies like Buzzfeed, Unsplash, and Character.ai use Replicate to power their AI features. Replicate’s goal is to democratize access to scalable, production-ready machine learning infrastructure, making AI deployment accessible even to non-experts.
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    Azure OpenAI Service Reviews

    Azure OpenAI Service

    Microsoft

    $0.0004 per 1000 tokens
    Utilize sophisticated coding and language models across a diverse range of applications. Harness the power of expansive generative AI models that possess an intricate grasp of both language and code, paving the way for enhanced reasoning and comprehension skills essential for developing innovative applications. These advanced models can be applied to multiple scenarios, including writing support, automatic code creation, and data reasoning. Moreover, ensure responsible AI practices by implementing measures to detect and mitigate potential misuse, all while benefiting from enterprise-level security features offered by Azure. With access to generative models pretrained on vast datasets comprising trillions of words, you can explore new possibilities in language processing, code analysis, reasoning, inferencing, and comprehension. Further personalize these generative models by using labeled datasets tailored to your unique needs through an easy-to-use REST API. Additionally, you can optimize your model's performance by fine-tuning hyperparameters for improved output accuracy. The few-shot learning functionality allows you to provide sample inputs to the API, resulting in more pertinent and context-aware outcomes. This flexibility enhances your ability to meet specific application demands effectively.
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    Grok Reviews
    Grok is an artificial intelligence inspired by the Hitchhiker’s Guide to the Galaxy, aiming to respond to a wide array of inquiries while also prompting users with thought-provoking questions. With a knack for delivering responses infused with humor and a bit of irreverence, Grok is not the right choice for those who dislike a lighthearted approach. A distinctive feature of Grok is its ability to access real-time information through the 𝕏 platform, allowing it to tackle bold and unconventional questions that many other AI systems might shy away from. This capability not only enhances its versatility but also ensures that users receive answers that are both timely and engaging.
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    Amazon Bedrock Reviews
    Amazon Bedrock is a comprehensive service that streamlines the development and expansion of generative AI applications by offering access to a diverse range of high-performance foundation models (FMs) from top AI organizations, including AI21 Labs, Anthropic, Cohere, Meta, Mistral AI, Stability AI, and Amazon. Utilizing a unified API, developers have the opportunity to explore these models, personalize them through methods such as fine-tuning and Retrieval Augmented Generation (RAG), and build agents that can engage with various enterprise systems and data sources. As a serverless solution, Amazon Bedrock removes the complexities associated with infrastructure management, enabling the effortless incorporation of generative AI functionalities into applications while prioritizing security, privacy, and ethical AI practices. This service empowers developers to innovate rapidly, ultimately enhancing the capabilities of their applications and fostering a more dynamic tech ecosystem.
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    Together AI Reviews

    Together AI

    Together AI

    $0.0001 per 1k tokens
    Be it prompt engineering, fine-tuning, or extensive training, we are fully equipped to fulfill your business needs. Seamlessly incorporate your newly developed model into your application with the Together Inference API, which offers unparalleled speed and flexible scaling capabilities. Together AI is designed to adapt to your evolving requirements as your business expands. You can explore the training processes of various models and the datasets used to enhance their accuracy while reducing potential risks. It's important to note that the ownership of the fine-tuned model lies with you, not your cloud service provider, allowing for easy transitions if you decide to switch providers for any reason, such as cost adjustments. Furthermore, you can ensure complete data privacy by opting to store your data either locally or within our secure cloud environment. The flexibility and control we offer empower you to make decisions that best suit your business.
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    Groq Reviews
    Groq aims to establish a benchmark for the speed of GenAI inference, facilitating the realization of real-time AI applications today. The newly developed LPU inference engine, which stands for Language Processing Unit, represents an innovative end-to-end processing system that ensures the quickest inference for demanding applications that involve a sequential aspect, particularly AI language models. Designed specifically to address the two primary bottlenecks faced by language models—compute density and memory bandwidth—the LPU surpasses both GPUs and CPUs in its computing capabilities for language processing tasks. This advancement significantly decreases the processing time for each word, which accelerates the generation of text sequences considerably. Moreover, by eliminating external memory constraints, the LPU inference engine achieves exponentially superior performance on language models compared to traditional GPUs. Groq's technology also seamlessly integrates with widely used machine learning frameworks like PyTorch, TensorFlow, and ONNX for inference purposes. Ultimately, Groq is poised to revolutionize the landscape of AI language applications by providing unprecedented inference speeds.
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    Cerebras Reviews
    Our team has developed the quickest AI accelerator, utilizing the most extensive processor available in the market, and have ensured its user-friendliness. With Cerebras, you can experience rapid training speeds, extremely low latency for inference, and an unprecedented time-to-solution that empowers you to reach your most daring AI objectives. Just how bold can these objectives be? We not only make it feasible but also convenient to train language models with billions or even trillions of parameters continuously, achieving nearly flawless scaling from a single CS-2 system to expansive Cerebras Wafer-Scale Clusters like Andromeda, which stands as one of the largest AI supercomputers ever constructed. This capability allows researchers and developers to push the boundaries of AI innovation like never before.
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