CATEGORY
AI LLM & AI Platforms tools (13)
Every AI LLM & AI Platforms tool we track on Unifai — 13 tools with verified sample outputs, pricing, and capabilities side by side.
Anthropic API
api
Developer REST API for programmatic access to Anthropic's Claude models (Opus, Sonnet, Haiku), featuring prompt caching, extended thinking, tool use, computer use, and the Agent SDK for production agents. Best for developers and teams building AI apps and coding agents; a direct alternative to the OpenAI API.
Cohere
freemium
Enterprise AI platform with Command R+ language model, Retrieval Augmented Generation, and multilingual text understanding for businesses.
Fireworks AI
freemium
Fast AI inference platform hosting open-source models with optimized serving. Offers function calling, JSON mode, and the fastest API speeds for LLM deployment.
Google AI Studio
freemium
Google's free platform for prototyping with Gemini models. Offers prompt engineering, model tuning, and API access for building AI applications.
Groq
freemium
Ultra-fast AI inference platform using custom LPU hardware. Provides the fastest token generation speeds for open-source LLMs like Llama and Mixtral.
Hugging Face
freemium
Open-source hub for machine learning — often called "GitHub for ML" — hosting 2M+ pretrained models, 700K+ datasets, and interactive Spaces demo apps, plus the Transformers library and Inference API to run, fine-tune, or deploy them. Best for developers and researchers building or sharing AI models across text, vision, and audio.
LangChain
freemium
Open-source framework (Python and JavaScript) for building LLM apps and AI agents, chaining models, prompts, memory, and 1,000+ tool and data integrations behind one provider-agnostic interface. Best for developers who want to swap model providers in a single line; pairs with LangGraph for orchestration and LangSmith for observability.
Llama
freemium
Meta's open-source large language model. Available in 8B, 70B, and 405B parameter sizes for local deployment, fine-tuning, and commercial applications.
LlamaIndex
freemium
Open-source data framework (Python & TypeScript) for building RAG pipelines and agents over your own data: 160+ data connectors, indexing, retrieval, and query engines, plus LlamaParse/LlamaCloud for parsing complex documents. Best for developers building document-grounded LLM apps; a leading alternative to LangChain.
OpenAI API
api
OpenAI's developer platform for programmatic access to its full model lineup — GPT-5 and o-series reasoning models, embeddings, image, audio, and Sora video — through the Responses and Chat Completions APIs with function calling, structured outputs, and built-in web search. For developers embedding AI into their apps.
OpenRouter
api
OpenRouter is a unified, OpenAI-compatible API that routes requests to 400+ LLMs from providers like Anthropic, OpenAI, Google, Meta, and DeepSeek through a single key and credit balance, with automatic fallback and load-balancing. Best for developers who want to compare or swap models without vendor lock-in, paying per token with a free-model tier to start.
Together AI
freemium
Cloud platform for running and fine-tuning open-source AI models at scale. Offers fast inference API for Llama, Mixtral, and 100+ models.
Vercel AI SDK
free
Free, open-source TypeScript toolkit from Vercel for building AI apps and agents. Offers a unified, provider-agnostic API (OpenAI, Anthropic, Google, and more) for text streaming, tool calls, and structured output, plus React/Next.js hooks like useChat. A TypeScript-native alternative to LangChain for JS developers.