Best Free LLM AI tools

Heretic is a toolkit for customizing, ablating, an...

Heretic is a toolkit for customizing, ablating, and evaluating dense and MoE/hybrid LLMs, offering built-in chat, a benchmark runner, multiple ablation and analysis methods, Hugging Face/GitHub integration, CLI/pip support, and reproducible workflows.

LLMs Work visually explains LLM internals—pre-trai...

LLMs Work visually explains LLM internals—pre-training, tokenization, transformer blocks, attention, inference, and RAG—plus dataset curation, training dynamics, and deployment considerations, with visualizations and live examples for debugging, evaluation, and model interpretation.

Portkey is an LLMOps platform offering a unified A...

Portkey is an LLMOps platform offering a unified API and model catalog with observability, guardrails, RBAC, audit logs, prompt management, caching, routing and PII redaction to simplify multi-model integration, governance, monitoring, and cost optimization.

DeepSeek Free provides browser access to 671-billi...

DeepSeek Free provides browser access to 671-billion‑parameter DeepSeek-R1/V3 models for conversational Q&A, code assistance, math solving, and document/image-aware NLP; supports direct use without login, workflow integration, customization, and encrypted data handling.

Rival is an AI model comparison platform that allo...

Rival is an AI model comparison platform that allows users to analyze and compare various AI models based on performance metrics and capabilities, facilitating informed decisions for developers and businesses in selecting tailored AI solutions.

Tila is a multi-agent AI platform with a visual in...

Tila is a multi-agent AI platform with a visual infinite canvas to connect LLMs and creative tools for multimodal workflow automation. Convert and generate text, images, audio, and video, automate sequences, integrate APIs, and build reusable templates.

Mistral.rs is an efficient, versatile tool for hig...

Mistral.rs is an efficient, versatile tool for high-speed large language model (LLM) inference, offering multi-device support and extensive quantization options for seamless deployment on diverse hardware setups.

LLM Arena enables users to compare multiple large ...

LLM Arena enables users to compare multiple large language models side-by-side, analyzing features like accuracy and capabilities. It supports up to 10 models, facilitating informed decision-making for researchers and developers in selecting the right LLM for their needs.

VLLM is a high-throughput, memory-efficient infere...

VLLM is a high-throughput, memory-efficient inference engine for Large Language Models, enabling faster responses and effective memory management. It supports multi-node configurations for scalability and offers robust documentation for seamless integration into workflows.

exllama is a memory-efficient tool for executing H...

exllama is a memory-efficient tool for executing Hugging Face transformers with the LLaMA models using quantized weights, enabling high-performance NLP tasks on modern GPUs while minimizing memory usage and supporting various hardware configurations.

HoneyHive delivers AI observability and evaluation...

HoneyHive delivers AI observability and evaluation for production agents, offering OpenTelemetry tracing across 100+ LLMs, live metrics on quality, safety, latency, cost, drift alerts, offline experimentation, expert annotation, CI/CD integration, and enterprise security.

The text-generation-webui is a Gradio-based web UI...

The text-generation-webui is a Gradio-based web UI for Large Language Models, supporting various backends and multiple interface modes. It allows quick model switching, extension integration, and dynamic LoRA loading for custom training.

LLM-answer-engine is an advanced answer engine lev...

LLM-answer-engine is an advanced answer engine leveraging Groq, Mixtral, Langchain.JS, Brave Search, Serper API, and OpenAI to provide sources, answers, images, videos, and follow-up questions efficiently. It offers an opensource Perplexity alternative.

EvalsOne is an evaluation platform for developers ...

EvalsOne is an evaluation platform for developers and researchers to assess LLM prompts, RAG, and agents using rule‑based or LLM‑based methods, human judgment, and customizable evaluators. It supports multiple APIs and integrates with major AI frameworks.

LangWatch enables real‑time testing of LLM agents,...

LangWatch enables real‑time testing of LLM agents, offering simulation, prompt management, audit trails, and batch testing across models. It integrates with OpenTelemetry, LangChain, LangGraph, and supports self‑hosted, cloud, and role‑based access.

Secoda centralizes data cataloging, metadata manag...

Secoda centralizes data cataloging, metadata management, and lineage tracking, offering AI‑driven search, query monitoring, and quality scoring. It provides role‑based access, CI/CD impact analysis, and real‑time observability dashboards to streamline workflows.

Puddl is an AI tool that provides insights and red...

Puddl is an AI tool that provides insights and reduces costs for OpenAI users, offering a free sign-up option, detailed cost breakdowns, request token-level details, a sleek playground, Python library, and more.

H2O.ai delivers an end‑to‑end AI platform that aut...

H2O.ai delivers an end‑to‑end AI platform that automates feature engineering, model selection, and explainability through AutoML, offers no‑code LLM training, supports enterprise multi‑model orchestration, and includes MLOps and a feature store, all compliant with strict data security standards.