Track the evolution
of artificial intelligence.
Explore AI models, agents, companies, releases, comparisons and the lineages connecting them — one interconnected record, updated as the field moves.
Moving right now
What shipped recently
Claude Sonnet 4.5
Anthropic's coding- and agent-focused flagship in the Claude 4 family.
GPT-5
OpenAI's next-generation flagship model succeeding GPT-4o.
Grok 4
xAI's Grok 4 reasoning flagship.
Llama 4
Meta's Llama 4 MoE family with very long context and multimodal input.
Gemini 2.5 Pro
Reasoning-focused member of the Gemini 2.5 family.
DeepSeek R1
Open-weight reasoning model that popularized reinforcement-learned chain-of-thought at scale.
DeepSeek V3
671B MoE open-weight base model.
Claude 3.5 Sonnet
Mid-tier 3.5 model that outperformed Claude 3 Opus on many tasks.
Model families & generations
Claude
Anthropic's Claude family of assistant models emphasizing safety and long context.
DeepSeek
DeepSeek's open-weight reasoning and coding model line.
Gemini
Google DeepMind's multimodal Gemini family, successor to PaLM and Bard.
GPT
OpenAI's Generative Pre-trained Transformer family, from GPT-1 through GPT-5.
Grok
xAI's Grok family of conversational models.
Llama
Meta's open-weight Llama family of foundation models.
Mistral
Mistral AI's open-weight and Mixtral MoE models.
Head-to-head
GPT-5 vs Claude Sonnet 4.5
GPT-5 and Claude Sonnet 4.5 target similar frontier assistant workloads but differ on context length, coding posture and agentic tooling.
vsGPT-4 vs GPT-5
Generational comparison between GPT-4 (2023) and GPT-5 (2025).
vsLlama 3 vs Llama 4
Comparing Meta's two most recent open-weight releases.
Assistants & autonomous systems
News
Anthropic ships Claude Sonnet 4.5
Anthropic releases Claude Sonnet 4.5 with a focus on coding and agentic workflows.
OpenAI releases GPT-5
OpenAI ships GPT-5, its next-generation flagship model.
Meta releases Llama 4
Meta ships Llama 4, its first mixture-of-experts flagship.
DeepSeek releases R1 open-weight reasoning model
DeepSeek R1 becomes a landmark open-weight reasoning release.
Learn
Open-source vs closed-source AI models
Weighing open-weight releases like Llama 4 and DeepSeek R1 against closed models like GPT-5 and Claude.
How AI context windows work
Tokens, attention and why bigger context windows are not always better.
What is an AI agent?
How AI agents differ from chatbots, and how they use tools to take actions.