Museum of Modelsest. 2024Back to the collection

Lifespans

Half the models the museum has watched were retired within 439 days of their release, about 14 months.

95% interval, 399 to 511 days. 267 models, 70 retirements, watched from 20 Feb 2026 to 23 Oct 2026.

100%50%0%release6 months1 year18 months2 years30 monthshalf by day 439
Still served, by days since release. The shaded band is the 95% interval. The line stops where fewer than five models are still being watched.
Gone within a year
38%29% to 48%
Gone within two years
83%71% to 92%

Next to go

Retirements the labs have announced for models OpenRouter still serves. The dates are for each lab’s own API.

  1. Claude Sonnet 4.5Anthropic, announced 30 Sep 2026
  2. GPT-5, GPT-5 Mini, GPT-5 Nano, GPT-5 Pro, OpenAI o3OpenAI, announced 11 Jun 2026
  3. GPT-4o (Omni), GPT-4o mini, GPT-4.1, GPT-4.1 MiniOpenAI, announced 14 Oct 2026
  4. GPT-5.1, GPT-5.3-Codex, GPT-5.4 NanoOpenAI, announced 1 Oct 2026
  5. Mistral Large 3 2512Mistral, announced 31 Oct 2026
  6. Gemini 3.1 Flash LiteGoogle

The record

Every retirement the museum has watched, newest first: the last day the model was served, and how long it lived.

  1. Solar Pro 3275 days
  2. GPT-4 Turbo932 days
  3. GPT-5.2 Chat322 days
  4. o1692 days
  5. o3 Mini682 days
  6. OpenAI o4 Mini High560 days
  7. OpenAI o4-mini560 days
  8. Qwen3 Next 80B A3B Thinking412 days
  9. NVIDIA Nemotron 3 Super230 days
  10. GPT-3.5 Turbo1,333 days
  11. DeepSeek R1625 days
  12. Claude Sonnet 4511 days
58 earlier retirements
  1. Qwen Plus 0728396 days
  2. Qwen3 235B A22B529 days
  3. Qwen3 30B A3B Thinking 2507406 days
  4. Qwen3 Coder Plus387 days
  5. Qwen3 Max399 days
  6. Qwen3 Max Thinking242 days
  7. Qwen3.6 Max Preview165 days
  8. Ling 3.0 Flash Sante34 days
  9. Ling 3.0 Flash Fin32 days
  10. Claude 3 Haiku935 days
  11. Nex-N2.5-Mini17 days
  12. Nex-N2.5-Pro17 days
  13. Ling 3.0 Flash VL13 days
  14. Claude Opus 4487 days
  15. Gemini 2.5 Pro (I/O Edition)496 days
  16. Gemini 2.5 Pro Preview 06-05466 days
  17. Mercury 2.5 Preview8 days
  18. Qwen3.8 Max32 days
  19. GPT-5 Codex338 days
  20. Gemma 3n 4B462 days
  21. NVIDIA Nemotron Nano 9B V2353 days
  22. GPT-5.3 Chat160 days
  23. GPT-5.1 Chat260 days
  24. Gemini 2.5 Flash Lite Preview 09-2025287 days
  25. INTELLECT-3208 days
  26. Llama 3 70B792 days
  27. MiMo-V2-Flash185 days
  28. GLM 4 32B320 days
  29. ERNIE 4.5 300B A47B337 days
  30. MiMo-V2-Omni74 days
  31. MiMo-V2-Pro74 days
  32. Mistral Devstral Medium324 days
  33. Mistral Devstral Small 1.1324 days
  34. GPT-4o Audio435 days
  35. DeepSeek V3.2 Speciale178 days
  36. Trinity Large Preview479 days
  37. Grok 3451 days
  38. Grok 3 Beta401 days
  39. Grok 3 Mini Beta401 days
  40. Grok 4310 days
  41. Grok 4 Fast238 days
  42. Grok 4.1 Fast175 days
  43. Grok Code Fast 1262 days
  44. Ring 2.6 1T7 days
  45. Claude 3.7 Sonnet439 days
  46. Claude 3.7 Thinking Sonnet438 days
  47. Ling 2.6 1T14 days
  48. Gemma 3n 2B300 days
  49. Mistral Small Creative134 days
  50. Ling 2.6 Flash7 days
  51. QwQ 32B419 days
  52. Mercury292 days
  53. Claude 3.5 Sonnet653 days
  54. Qwen3.6 Plus Preview3 days
  55. Grok 4.20 Beta19 days
  56. Grok 4.20 Multi-Agent Beta19 days
  57. Gemini 3 Pro Preview127 days
  58. Llama 3.1 405B601 days

How this is counted

A model’s life runs from its release to the last day it was served on OpenRouter. The museum’s watch checks OpenRouter every day and calls a model retired once none of its listings has been served for 36 hours. A model still served counts as alive up to 23 Oct 2026, when these statuses were taken; in survival analysis it is censored there.

Retirements are dated only from 20 Feb 2026, when OpenRouter availability began to be recorded, and a model enters the collection only once it has been asked. So each model counts from the later of those two days, at the age it had then (late entry, or left truncation). The 26 models already gone by then are left out rather than dated to that day. Read without this correction, the same records give a median of 560 days.

Also left out: 19 code names, the previews OpenRouter serves under invented names (counting them gives a median of 435 days), and 70 models OpenRouter never listed, whose availability is not observed. Served means served on OpenRouter, which can differ from a lab’s own API.

The estimate is Kaplan and Meier’s, with Greenwood’s variance and a log-log 95% interval; the median’s interval is where the interval’s bounds cross one half. Release days are those in the open collection. Nothing here ranks models or labs: a long life says nothing about a model’s answers.

Downloads

The numbers are recomputed from the collection whenever a status changes. To cite them, cite the collection:

Museum of Models. (2026). Museum of Models collection (Version 1.6.0) [Data set]. https://doi.org/10.5281/zenodo.23828158