Best API & SDK AI Tools

Access GPT-4, DALL-E, and Whisper via API

The OpenAI API provides programmatic access to OpenAI's suite of models including GPT-4o, GPT-4, DALL-E 3, Whisper, and text embeddings. It powers thousands of applications with capabilities spanning text generation, image creation, speech-to-text, and more.

Build with Claude models via Anthropic's API

The Anthropic API provides access to the Claude family of models, known for safety, long context windows, and strong reasoning. It supports text generation, vision, tool use, and batch processing. Claude models excel at complex analysis, coding, and following nuanced instructions.

Prototype and build with Google's Gemini models

Google AI Studio is a web-based tool for prototyping and accessing Gemini models. It provides a free API for Gemini Pro and Gemini Flash, structured output support, and tools for fine-tuning and prompt engineering. It is the fastest way to start building with Google's AI models.

Enterprise-grade NLP APIs for text understanding

Cohere provides enterprise-focused NLP APIs for text generation, semantic search, classification, and summarization. Its Command model excels at business text generation while Embed models power semantic search. Cohere can be deployed on any cloud or on-premises.

High-performance open-weight models via API

Mistral AI provides API access to its family of high-performance language models including Mistral Large, Mistral Medium, and the open-weight Mistral 7B and Mixtral. Known for excellent performance-to-cost ratio, Mistral models are popular for both commercial and research applications.

Ultra-fast LLM inference with custom LPU hardware

Groq provides the fastest LLM inference available, powered by its custom Language Processing Unit (LPU) hardware. It offers API access to open-source models like Llama 3 and Mixtral with speeds exceeding 500 tokens per second, making real-time AI applications practical.

Run and fine-tune open-source AI models at scale

Together AI provides a cloud platform for running, fine-tuning, and training open-source AI models. It offers access to over 100 models including Llama, Mistral, and Stable Diffusion with competitive pricing and fast inference speeds.

Production-grade generative AI inference platform

Fireworks AI is an inference platform optimized for production generative AI workloads. It provides fast, reliable access to open-source and custom models with features like function calling, structured output, and model composition for complex AI applications.

Scalable AI compute platform built on Ray

Anyscale provides a managed platform for scaling AI workloads using the open-source Ray framework. It supports model training, fine-tuning, and serving at scale with automatic resource management. Anyscale is used by companies running large-scale AI infrastructure.

Run open-source ML models with a cloud API

Replicate makes it easy to run open-source machine learning models in the cloud with a simple API. It hosts thousands of models for image generation, language, audio, and video, with automatic scaling and pay-per-use pricing. Developers can also deploy custom models.

Serverless API for 200K+ open-source models

Hugging Face Inference API provides instant access to over 200,000 open-source models without managing infrastructure. It supports text generation, image creation, audio processing, and more. The Inference Endpoints product enables dedicated deployments for production workloads.

Low-cost inference for popular open-source AI models

DeepInfra provides fast, affordable inference for popular open-source AI models. It offers an OpenAI-compatible API, making it easy to switch from commercial providers, and supports text, image, and embedding models with competitive pricing.

Search-augmented LLM API with real-time web access

The Perplexity API provides access to search-augmented language models that can access real-time web information. Unlike standard LLMs, Perplexity models include built-in web search grounding, providing up-to-date, cited responses ideal for research and information retrieval applications.

Wafer-scale AI inference for blazing-fast generation

Cerebras offers AI inference powered by its wafer-scale engine, delivering some of the fastest token generation speeds available. Its API provides access to open-source models with dramatically lower latency than GPU-based solutions, enabling new classes of real-time AI applications.

Enterprise AI platform with custom chip inference

SambaNova provides enterprise AI infrastructure powered by its custom SN40L chip. Its platform offers fast inference for large language models with enterprise-grade security, on-premises deployment options, and full-stack AI solutions for organizations requiring sovereignty over their AI infrastructure.

Unified API proxy for 100+ LLM providers

LiteLLM provides a unified API interface for calling 100+ LLM providers using the OpenAI format. It enables developers to switch between models, implement fallbacks, track costs, and manage rate limits through a single API proxy.

Structured output extraction from LLMs using Pydantic

Instructor is a Python library that makes it easy to get structured, validated outputs from LLMs. It uses Pydantic models to define output schemas and leverages function calling to extract reliable, typed data from any LLM provider.

Open-source framework for building production RAG pipelines

Haystack by deepset is an open-source framework for building production-ready RAG pipelines and AI applications. It provides modular components for document processing, retrieval, and generation with support for multiple LLMs and vector stores.

High-performance open-source vector search engine

Qdrant is a high-performance vector similarity search engine written in Rust. It provides advanced filtering, payload indexing, and distributed deployment for building production-grade AI applications with efficient nearest neighbor search.

Fastest generative AI inference platform for developers

Fireworks AI provides the fastest inference platform for generative AI models with optimized serving for open-source and custom models. It delivers sub-200ms latency for popular models and offers fine-tuning, function calling, and structured output support.

Serverless AI inference for open-source models

DeepInfra provides serverless inference for popular open-source AI models including Llama, Mistral, and Stable Diffusion. It offers competitive pricing, fast inference, and OpenAI-compatible API endpoints for easy integration and model switching.

Data framework for connecting LLMs with private data

LlamaIndex is a data framework that connects large language models with private and custom data sources. It provides data connectors, indexing strategies, and query engines for building RAG applications, knowledge agents, and data-augmented AI applications.

Framework for developing LLM-powered applications

LangChain is the most popular framework for building applications powered by large language models. It provides modular components for prompt management, memory, chains, agents, and retrieval that simplify the development of complex AI applications.

Open platform for sharing and deploying ML models

Hugging Face provides the largest open platform for sharing machine learning models, datasets, and AI applications. It hosts 500K+ models, 100K+ datasets, and provides infrastructure for training, fine-tuning, and deploying AI models with a vibrant community.

Unified API gateway for accessing all major LLMs

OpenRouter provides a single API to access models from OpenAI, Anthropic, Google, Meta, Mistral, and dozens of other providers. It offers unified pricing, automatic routing, and usage tracking across all major LLMs through one API key.

Run and deploy ML models with a cloud API

Replicate lets developers run open-source machine learning models in the cloud with a simple API. It hosts thousands of models for image generation, language, audio, and video, providing serverless GPU infrastructure without managing any hardware.

Fast inference and fine-tuning for open-source AI models

Together AI provides fast inference, fine-tuning, and training for leading open-source AI models. It offers competitive pricing, high throughput, and support for models from Llama, Mistral, and other leading open-source model families.

API access to Claude models for building AI applications

The Anthropic API provides access to the Claude family of AI models for building applications. It offers industry-leading capabilities in reasoning, coding, and analysis with features like tool use, vision, and extended context windows up to 200K tokens.

Development environment for building with Gemini models

Google AI Studio provides a development environment for prototyping and building applications with Google's Gemini models. It offers prompt engineering tools, API key management, model tuning, and direct access to Gemini Pro and Ultra models.

Enterprise AI models for search, generation, and classification

Cohere provides enterprise-grade AI models optimized for business applications. Its Command models for generation, Embed models for search, and Rerank models for relevance help enterprises build secure, scalable AI applications with deployment flexibility.

European AI models with open and commercial offerings

Mistral AI provides a range of AI models from open-source (Mistral 7B) to commercial (Mistral Large) through its API platform. Known for efficiency and performance, Mistral models offer strong reasoning with competitive pricing and EU data sovereignty.

State-of-the-art multilingual text embeddings API

Cohere Embed generates high-quality vector embeddings for text in over 100 languages. It powers semantic search, classification, and clustering applications with industry-leading accuracy on retrieval benchmarks.

Developer platform for building voice AI agents

Vapi provides APIs and SDKs for building voice AI agents that can make and receive phone calls. It handles speech-to-text, LLM orchestration, and text-to-speech in a unified platform with sub-second latency.

Open-source function calling model by Fireworks AI

Firefunction is an open-source model optimized for function calling and tool use by Fireworks AI. It excels at routing requests to the right tools and structuring API calls based on natural language instructions.

High-performance NLP and generative AI API platform

NLPCloud provides production-grade API access to a wide range of NLP and generative AI models. It offers fine-tuning, fast inference, and dedicated GPU instances for tasks like text generation, summarization, and classification.

API access to Runway's creative AI models

RunwayML API provides developer access to Runway's suite of creative AI models including video generation, image editing, and more. Build creative AI features into applications with production-ready endpoints.

Hybrid SSM-Transformer model with massive context window

Jamba by AI21 Labs is a hybrid architecture combining State Space Models with Transformer layers, enabling a massive 256K context window with efficient inference. It excels at long-document processing and complex reasoning.

Multimodal AI models for enterprise applications

Reka builds multimodal AI models that understand text, images, video, and audio natively. Their models power enterprise applications requiring deep understanding of diverse content types in a single unified model.

Fast and affordable open-source model API hosting

AnyScale Endpoints provides fast, cost-effective API access to popular open-source models. It offers optimized inference for Llama, Mistral, and other models with OpenAI-compatible API format and competitive pricing.

Video AI API for developers with pre-built models

Sieve provides a suite of video AI APIs including dubbing, lip sync, background removal, video upscaling, and object tracking. Developers can chain these capabilities together for complex video processing pipelines.

Enterprise-grade LLM built for business writing and workflows

Writer's Palmyra is a family of LLMs designed specifically for enterprise use cases. It excels at business writing, data analysis, and workflow automation while maintaining enterprise security and compliance standards.

Neural reranking API to improve search relevance

Cohere Rerank improves search results by reranking documents based on semantic relevance to a query. It works as a post-processing step for any search system to dramatically improve result quality.

Fastest LLM inference with custom LPU hardware

Groq provides ultra-fast LLM inference using custom Language Processing Unit hardware. It delivers tokens at speeds significantly faster than GPU-based solutions, enabling real-time AI applications with minimal latency.

Real-time voice conversation API by OpenAI

OpenAI's Realtime API enables developers to build voice-to-voice AI applications with natural-sounding speech and low latency. It supports real-time conversation with function calling, emotion, and interruption handling.

Foundation models for embeddings, reranking, and search

Jina AI provides foundation models and APIs for multilingual embeddings, document reranking, and neural search. Its models power semantic understanding across text, images, and code for production applications.

Fastest AI inference with wafer-scale compute

Cerebras offers the fastest AI inference using their wafer-scale engine, delivering tokens at unprecedented speeds. Their API provides instant responses for latency-sensitive applications with competitive pricing.

Compact and efficient LLM for enterprise deployment

Upstage Solar is a compact, high-performance language model optimized for enterprise deployment. It offers strong performance in a smaller model size, enabling cost-effective deployment with fast inference times.

Fast and affordable inference for open-source AI models

Together AI provides fast, affordable inference for leading open-source models including Llama, Mistral, and others. It offers custom fine-tuning, dedicated instances, and the fastest inference for popular open-source models.

Full-stack AI platform for computer vision and NLP

Clarifai provides a full-stack AI platform for building, deploying, and managing computer vision and NLP models. It offers pre-built models, custom training, and edge deployment for enterprise applications.

Marketplace for AI APIs with unified access

RapidAPI's AI Hub provides a marketplace of AI APIs with unified access, authentication, and billing. Discover and integrate AI capabilities from hundreds of providers through a single API gateway.

Full-stack AI inference platform with custom hardware

SambaNova provides AI inference using custom-designed Reconfigurable Dataflow Architecture chips. It offers ultra-fast inference for open-source models with consistent performance and competitive pricing.

Give AI assistants the ability to act in 7000+ apps

Zapier AI Actions provides an API that lets AI assistants perform actions across 7,000+ apps. It enables LLMs and AI agents to send emails, create tasks, update CRMs, and more through a single API endpoint.

Anthropic's balanced intelligence and speed model

Claude Sonnet 4 by Anthropic provides an excellent balance of intelligence, speed, and cost. It excels at coding, analysis, and writing tasks with strong safety properties and 200K context window.

API for capturing meeting data from any video platform

Recall AI provides APIs for capturing meeting audio, video, transcriptions, and metadata from Zoom, Google Meet, Teams, and other platforms. It enables developers to build meeting intelligence products.

Anthropic's fastest and most cost-effective model

Claude Haiku is Anthropic's fastest, most compact model designed for near-instant responsiveness. It excels at lightweight tasks like customer interactions, content moderation, and data processing at low cost.

AI-enhanced real-time video and voice communication APIs

Agora provides real-time engagement APIs enhanced with AI features including noise suppression, virtual backgrounds, spatial audio, and AI-powered content moderation for video and voice applications.

Multimodal AI model understanding text, images, video, and audio

Reka Core is a frontier multimodal model that processes text, images, video, and audio natively. It provides strong reasoning across modalities for enterprise applications requiring unified content understanding.

API access to Jasper's marketing AI capabilities

Jasper's API provides programmatic access to its marketing AI capabilities including content generation, brand voice, and campaign creation. Developers can integrate Jasper's marketing intelligence into custom applications.

Run AI models on Cloudflare's global edge network

Cloudflare Workers AI lets developers run AI models on Cloudflare's global edge network. It provides serverless GPU inference for open-source models including LLMs, image generation, and speech models close to users.

Google's frontier multimodal AI model with agentic capabilities

Gemini 2.0 is Google's latest frontier AI model with native multimodal capabilities and agentic features. It can understand and generate text, images, audio, and video while using tools and taking actions.