THROUGH THE YEARS
Progress has a history.
Selected, sourced milestones. Each timeline states its coverage.
Model histories follow one company's releases in order, so you can see how fast capabilities moved and which launches mattered most. Every entry has a date and a link to the original source. The timelines are selective rather than complete, and each one says exactly which period and which product line it covers.
OpenAI
OpenAI model history: selected releases from GPT-2 to GPT-4o
Follow five sourced OpenAI milestones from text completion in 2019 to multimodal interaction in 2024.
Explore AnthropicClaude model history: Sonnet releases, 2024 to 2025
See what changed between the original Claude 3.5 Sonnet and Claude 3.7 Sonnet, with sources and release context.
Explore GoogleGemini model history: selected Pro releases in 2024 and 2025
Compare the Gemini 1.5 Pro limited preview with Gemini 2.5 Pro Experimental: long context, reasoning and availability.
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