{
 "slug": "Jurassic_(models)",
 "title": "Jurassic (models)",
 "type": "model",
 "short_desc": "AI21 Labs' family of large autoregressive language models, spanning Jurassic-1 (2021) and Jurassic-2 (2023), later succeeded by Jamba.",
 "categories": [
  "Models",
  "2021 model releases",
  "2023 model releases"
 ],
 "infobox": {
  "Developer": "AI21 Labs",
  "Family": "Jurassic",
  "Announced": "August 2021 (Jurassic-1); March 2023 (Jurassic-2)",
  "Architecture": "Autoregressive decoder-only Transformer",
  "Parameters": "178 billion (Jurassic-1 Jumbo, developer-reported); Jurassic-2 undisclosed",
  "Context window": "2,048 tokens (Jurassic-1); 8,192 tokens (Jurassic-2)",
  "Post-training": "Instruction-tuned variants offered for Jurassic-2",
  "License / access": "Proprietary; AI21 Studio API, later Amazon Bedrock",
  "Paper/report": "AI21 Labs, \"Jurassic-1: Technical Details and Evaluation,\" August 2021"
 },
 "infobox_links": {
  "Developer": [
   "AI21_Labs"
  ],
  "Architecture": [
   "Transformer_(architecture)"
  ]
 },
 "aliases": [
  "Jurassic-1",
  "Jurassic-2"
 ],
 "family": "",
 "org": "",
 "registry_status": "stub",
 "words": 346,
 "references": 3,
 "outbound": [
  "AI21_Labs",
  "Amazon_Titan",
  "GPT-3",
  "Instruction_tuning",
  "Jamba",
  "Large_language_model",
  "Megatron-Turing_NLG",
  "OpenAI",
  "State-space_model",
  "Transformer_(architecture)"
 ],
 "inbound": [
  "AI21_Labs",
  "Amazon_Titan",
  "Jamba",
  "Stated_missions_of_AI_labs"
 ],
 "url": "wiki/Jurassic_(models).html",
 "built": "2026-07-24"
}