Explore AI models, agents, companies, releases, comparisons and the lineages connecting them — one interconnected record, updated as the field moves.
Anthropic's coding- and agent-focused flagship in the Claude 4 family.
OpenAI's next-generation flagship model succeeding GPT-4o.
xAI's Grok 4 reasoning flagship.
Claude Opus 4 is Anthropic's top-tier model from the Claude 4 generation, released in May 2025 alongside Sonnet 4. It is built for long, autonomous coding and agent work, and can think at length while using tools.
OpenAI o3 is the successor to o1 in OpenAI's reasoning line. Released in April 2025, it can call tools such as web search and Python while it reasons, and it reasons over images as well as text.
Meta's Llama 4 MoE family with very long context and multimodal input.
Reasoning-focused member of the Gemini 2.5 family.
Open-weight reasoning model that popularized reinforcement-learned chain-of-thought at scale.
Anthropic's Claude family of assistant models emphasizing safety and long context.
DeepSeek's open-weight reasoning and coding model line.
Google DeepMind's multimodal Gemini family, successor to PaLM and Bard.
OpenAI's Generative Pre-trained Transformer family, from GPT-1 through GPT-5.
xAI's Grok family of conversational models.
Meta's open-weight Llama family of foundation models.
Mistral AI's open-weight and Mixtral MoE models.
OpenAI's reasoning-first model line, which spends inference-time compute on a private chain of thought before answering.
Claude Code vs Cursor: a terminal-native coding agent against an AI-first code editor. Claude Code works autonomously from the command line. Cursor keeps you in a visual editor with AI at every step.
vsDeepSeek vs ChatGPT: a free open-weight challenger against the most widely used AI assistant. DeepSeek matches ChatGPT on a lot of reasoning and coding work at no cost. ChatGPT offers more features: voice, image generation, agents and deep integrations.
vsGemini vs ChatGPT: Google's assistant against OpenAI's. Gemini is strongest inside Google's ecosystem and with very long documents. ChatGPT leads on breadth of features and third-party integrations.
vsCursor vs GitHub Copilot: a standalone AI editor against an AI assistant that plugs into the editor you already use.
vsGrok vs ChatGPT: xAI's assistant, with live access to X, against OpenAI's all-rounder. Grok is the pick for real-time social and news context. ChatGPT is more polished and offers more features.
vsClaude vs ChatGPT: Anthropic's assistant against OpenAI's. Claude is widely preferred for writing quality and coding. ChatGPT has more features, including voice, image generation and a bigger ecosystem.
General-purpose conversational assistant
General-purpose assistant with long context and safety focus
Anthropic's agentic coding tool that works from the terminal, reading and editing a codebase and running commands.
AI-first code editor (a fork of VS Code) with chat, multi-file edits and an autonomous agent mode.
Anthropic releases Claude Sonnet 4.5 with a focus on coding and agentic workflows.
OpenAI ships GPT-5, its next-generation flagship model.
Meta ships Llama 4, its first mixture-of-experts flagship.
DeepSeek R1 becomes a landmark open-weight reasoning release.
Claude 1 is the initial public large language model from Anthropic, designed for strong context handling and assistant roles.
GPT-2 is a second-generation language model known for its text generation capabilities, released with considerations for safety.
Weighing open-weight releases like Llama 4 and DeepSeek R1 against closed models like GPT-5 and Claude.