AI Models
Structured technical profiles of notable foundation models: architecture, developer, release date, capabilities, and context window.
Claude Sonnet 4.5
MultimodalAnthropic's coding- and agent-focused flagship in the Claude 4 family.
Sep 29, 2025200K tokensClosedGPT-5
MultimodalOpenAI's next-generation flagship model succeeding GPT-4o.
Aug 7, 2025400K tokensClosedLlama 4
MultimodalMeta's Llama 4 MoE family with very long context and multimodal input.
Apr 5, 202510M tokensOpenGemini 2.5 Pro
MultimodalReasoning-focused member of the Gemini 2.5 family.
Mar 25, 20251M tokensClosedDeepSeek R1
Open-weight reasoning model that popularized reinforcement-learned chain-of-thought at scale.
Jan 20, 2025128K tokensOpenClaude 3.5 Sonnet
MultimodalMid-tier 3.5 model that outperformed Claude 3 Opus on many tasks.
Jun 20, 2024200K tokensClosedGPT-4o
MultimodalOmni-model unifying text, vision and audio in a single network with realtime capabilities.
May 13, 2024128K tokensClosedLlama 3
8B and 70B open-weight release, later extended to Llama 3.1 and 3.2 with vision.
Apr 18, 20248.2K tokensOpenGemini 1.5 Pro
MultimodalIntroduced the 1M–2M token context window on a mixture-of-experts architecture.
Feb 15, 20242M tokensClosedGPT-4
MultimodalMultimodal successor to GPT-3.5 with substantial gains on reasoning benchmarks.
Mar 14, 20238.2K tokensClosedGPT-3.5
Instruction-tuned refresh of GPT-3 that powered the original ChatGPT launch.
Nov 30, 20224.1K tokensClosedGPT-3
175B parameter model that established the modern LLM API paradigm.
Jun 11, 20202.0K tokensClosedGPT-2
Second-generation GPT model, initially released with a staged rollout over safety concerns.
Feb 14, 20191.0K tokensOpen