A sourced chronology

The model
release timeline.

A readable record of major OpenAI, Anthropic, and Google launches preserved from the original BotsFired timeline.

Historical snapshot: the recovered timeline ends on March 5, 2026. It does not claim to include every release since then.

  1. OpenAI

    GPT-5.4

    Official release source
  2. OpenAI

    GPT-5.3-Codex

    Official release source
  3. Anthropic

    Claude Opus 4.1

    Official release source
  4. Google

    Gemini 2.5 Pro GA

    Official release source
  5. Anthropic

    Claude 4

    Official release source
  6. OpenAI

    OpenAI o3 / o4-mini

    Official release source
  7. Google

    Gemini 2.5 Pro Preview

    Official release source
  8. OpenAI

    GPT-4.5

    Official release source
  9. Anthropic

    Claude 3.7 Sonnet

    Official release source
  10. Google

    Gemini 2.0

    Official release source