| Tool/Platform | Description | URL | Free Tier / Access |
|---|
| ChatGPT (OpenAI) | Web-based AI chatbot by OpenAI (GPT-4o):contentReference[oaicite:0]{index=0}. Advanced conversational AI with built-in plugins and tools. | chat.openai.com | Free tier with limited GPT-4o usage:contentReference[oaicite:1]{index=1} (upgrade to Plus/Pro for higher limits). |
| Claude (Anthropic) | AI assistant by Anthropic (e.g., Claude 3.7 Sonnet):contentReference[oaicite:2]{index=2}. Focuses on safe, helpful conversation. | claude.ai | Free to use with signup (limited usage):contentReference[oaicite:3]{index=3}; paid plans for higher limits. |
| Google Gemini | Google’s AI chatbot (formerly Bard):contentReference[oaicite:4]{index=4}, based on Gemini LLM. Accessible via Google account. | gemini.google.com | Free access with Google account; integrated in Google Search/Assistant (limits apply). |
| DeepSeek | Chinese AI chatbot by DeepSeek (models R1, V3):contentReference[oaicite:5]{index=5}. Known for high performance at lower cost. | chat.deepseek.com | Free web/mobile app (regional restrictions may apply):contentReference[oaicite:6]{index=6}. |
| Grok (xAI) | AI chatbot by Elon Musk’s xAI, launched 2023:contentReference[oaicite:7]{index=7}. Branded as “truth-seeking” and humorous. | grok.com | Available via X (Twitter) platform (requires X Premium in many regions). |
| Microsoft Copilot (Bing Chat) | Microsoft’s AI chat tool (renamed Copilot in Bing):contentReference[oaicite:8]{index=8}. Integrated into Bing search and Edge browser. | copilot.microsoft.com | Free with a Microsoft account (limits apply); corporate Copilot offerings available. |
| Character.AI | Chat platform for AI “characters”:contentReference[oaicite:9]{index=9}. Users create or chat with AI personas (fictional or real). | character.ai | Free registration required; basic usage included, with optional Pro tier. |
| Poe (Quora) | Aggregator for multiple AI models (ChatGPT, Claude, etc.):contentReference[oaicite:10]{index=10}. Single interface to chat with various bots. | poe.com | Free usage with Quora login (limited queries), offers Multi-bot chats and paid add-ons. |
| Perplexity AI | AI Q&A engine with citations:contentReference[oaicite:11]{index=11}. Provides concise answers with source links. | perplexity.ai | Free basic tier; paid Pro subscription for higher query limits and private mode. |
| HuggingChat | Community chat interface by Hugging Face:contentReference[oaicite:12]{index=12}. Lets users interact with open models via web UI. | huggingface.co/chat | Free to use (Hugging Face account needed) with open-source models. |
| Service | Description | URL | Free Tier / Access |
|---|
| Hugging Face Inference | Cloud API for hosting and running thousands of open models:contentReference[oaicite:13]{index=13}. Supports NLP, vision, audio, etc. | huggingface.co | Free tier with limited credits (community models); paid plans for higher throughput. |
| GroqCloud | High-speed AI inference platform (Groq hardware):contentReference[oaicite:14]{index=14}. Optimized for ultra-low latency. | groq.com | Free API key available:contentReference[oaicite:15]{index=15}; usage billed by compute (e.g. GPU-hours). |
| Together.ai | AI compute cloud for training and serving open models (200+ models):contentReference[oaicite:16]{index=16}. Offers easy scaling and fine-tuning support. | together.ai | Free community tier (for experiments); paid usage-based pricing for enterprise-level compute. |
| Google Vertex AI | Google Cloud platform for ML/AI, including generative AI agents:contentReference[oaicite:17]{index=17} (Gemini, etc.). Managed model serving with Google’s infrastructure. | cloud.google.com/vertex-ai | Free trial credits (new users); pay-as-you-go for deployed models and training. |
| Amazon Bedrock | AWS managed service offering multiple foundation models (Anthropic, Cohere, Mistral, etc.):contentReference[oaicite:18]{index=18} via a single API. | aws.amazon.com/bedrock | Free trial credit (new AWS accounts); pay-per-call and per-instance pricing based on model. |
| Azure OpenAI Service | Microsoft Azure’s deployment of OpenAI models (GPT-4, DALL·E, etc.) in cloud. Enterprise features like Azure AD integration. | azure.microsoft.com | Pay-as-you-go; Azure free credits available for new accounts. |
| Tool | Description | URL | Access |
|---|
| Ollama | Open-source CLI/app for running local LLMs on macOS:contentReference[oaicite:19]{index=19}. Supports model downloads (LLama, GPT) and chat via localhost. | ollama.com | Free; runs on Apple Silicon (local download of models required). |
| LM Studio | Cross-platform GUI for local LLMs:contentReference[oaicite:20]{index=20}. Discover, download, and chat with open models on your computer. | lmstudio.ai | Free download (Windows, macOS, Linux); no cloud needed. |
| GPT4All | Local AI chat app by Nomic:contentReference[oaicite:21]{index=21}. Runs large language models privately on-device (Windows/Mac/Linux). | gpt4all.io | Free & open-source; desktop application (GPU optional, CPU mode available). |
| LocalAI | Open-source local inference server (OpenAI API-compatible):contentReference[oaicite:22]{index=22}. Serves LLMs, image/audio models locally via REST. | localai.io | Free (self-hosted); supports multiple backends (llama.cpp, vLLM, etc.). |
| text-generation-webui | Community web UI for local LLMs (uses PyTorch or llama.cpp) to chat or generate text. Supports many open models. | GitHub repository | Free; Python-based, requires manual setup and GPU (CPU fallback available). |
| App | Description | URL | Access |
|---|
| DiffusionBee | macOS app bundling Stable Diffusion for offline image generation:contentReference[oaicite:23]{index=23}. Offers text→image, inpainting, upscaling, and model training. | diffusionbee.com | Free download (macOS only); runs entirely offline. |
| Fello AI | macOS chatbot app aggregating multiple AI models (ChatGPT, Claude, DeepSeek, etc.):contentReference[oaicite:24]{index=24}. Summon via menu bar. | App Store | Free on Mac App Store (in-app purchases for premium features). |
| Pieces | Productivity desktop app for developers:contentReference[oaicite:25]{index=25}. AI-assisted code search, completion, and contextual help using LLMs. | docs.pieces.app | Free tier (macOS/Windows/Linux); paid Team/Enterprise plans for collaboration. |
| Straico | Universal AI assistant app:contentReference[oaicite:26]{index=26}. AI suggestions via hotkey; templates for writing, summarizing, etc. (Windows/macOS/Linux). | straico.com | Free beta desktop app; sign-up required. |
| Descript | Multimedia editing app with AI (transcription, text-based video editing, voice cloning). Popular on macOS and Windows. | descript.com | Free tier (watermark, limited exports); paid plans starting ~$12/mo. |
| Platform | Description | URL | Access |
|---|
| GitHub Models Catalog | GitHub’s AI model marketplace:contentReference[oaicite:27]{index=27}. Browse and test models from various providers; integrates with Azure for production use. | github.com/marketplace/models | Free to browse and prototype (GitHub or Azure account needed for deployment). |
| Hugging Face Hub | Community repository of 1M+ ML models and datasets:contentReference[oaicite:28]{index=28}. Enables hosting, sharing, and inference of models across modalities. | huggingface.co/models | Free for public models; paid options for private models and managed inference. |
| Replicate | API marketplace for running open-source models:contentReference[oaicite:29]{index=29} (text, image, audio, etc.). One-line code integration. | replicate.com | Free tier (limited compute credits); pay-per-use pricing thereafter. |
| ModelScope | Alibaba’s model hub for research and enterprise AI (multimodal) with inference APIs. | modelscope.cn | Free tier for many community models; enterprise plans for large-scale use. |
| AI Model Repositories | Various lists/catalogs of AI models (e.g. TensorFlow Hub, CivitAI for diffusion LoRAs, etc.). | See e.g. tensorflow.org/hub, civitai.com, etc. | Publicly accessible (often free downloads; check licenses per model). |