LLM WORLD

Anthropic

22 tracked releases · 0 open weights · median 39 days between releases

At a glance

Releases tracked22
FamiliesClaude
First trackedMarch 14, 2023 — Claude 1
LatestOctober 7, 2026 — Claude Haiku 5.5
Median gap39 days · slower than the 21-day median across tracked labs
WeightsProprietary throughout
Record quality15 of 22 verified · how this is judged

Release cadence

One tile per tracked release, placed in the month it shipped; the year links through to that year's timeline. Tracked releases only — a quiet year here may mean this dataset is thin for that year rather than that the lab was quiet.

  1. 2023
    1. Claude 1, Anthropic, March 14, 2023
    2. Claude 2, Anthropic, July 11, 2023
    2
  2. 2024
    1. Claude 3 Opus, Anthropic, March 4, 2024
    2. Claude 3.5 Sonnet, Anthropic, June 21, 2024
    2
  3. 2025
    1. Claude 3.7 Sonnet, Anthropic, February 24, 2025
    2. Claude Opus 4, Anthropic, May 22, 2025
    3. Claude Sonnet 4.5, Anthropic, September 29, 2025
    4. Claude Haiku 4.5, Anthropic, October 15, 2025
    5. Claude Opus 4.5, Anthropic, November 24, 2025
    5
  4. 2026
    1. Claude Opus 4.6, Anthropic, February 5, 2026Claude Sonnet 4.6, Anthropic, February 17, 2026
    2. Claude Opus 4.7, Anthropic, April 16, 2026
    3. Claude Opus 4.8, Anthropic, May 28, 2026
    4. Claude Fable 5, Anthropic, June 9, 2026Claude Mythos 5, Anthropic, June 9, 2026Claude Sonnet 5, Anthropic, June 30, 2026
    5. Claude Opus 5, Anthropic, July 24, 2026
    6. Claude Fable 5.1, Anthropic, September 1, 2026Claude Mythos 5.1, Anthropic, September 1, 2026Claude Opus 5.5, Anthropic, September 22, 2026Claude Sonnet 5.5, Anthropic, September 28, 2026
    7. Claude Haiku 5.5, Anthropic, October 7, 2026
    13

Context window over time

Releases with a disclosed context window.

Claude 1 · 2023 9K tokens
Claude 2 · 2023 100K tokens
Claude 3 Opus · 2024 200K tokens
Claude 3.5 Sonnet · 2024 200K tokens
Claude 3.7 Sonnet · 2025 200K tokens
Claude Opus 4 · 2025 200K tokens
Claude Sonnet 4.5 · 2025 200K tokens
Claude Haiku 4.5 · 2025 200K tokens
Claude Opus 4.5 · 2025 200K tokens
Claude Opus 4.6 · 2026 1M tokens
Claude Sonnet 4.6 · 2026 1M tokens
Claude Opus 4.7 · 2026 1M tokens
Claude Opus 4.8 · 2026 1M tokens
Claude Fable 5 · 2026 1M tokens
Claude Mythos 5 · 2026 1M tokens
Claude Sonnet 5 · 2026 1M tokens
Claude Opus 5 · 2026 1M tokens
Claude Fable 5.1 · 2026 1M tokens
Claude Mythos 5.1 · 2026 1M tokens
Claude Opus 5.5 · 2026 1M tokens
Claude Sonnet 5.5 · 2026 1M tokens
Claude Haiku 5.5 · 2026 1M tokens

Evidenced capabilities

How often each capability is cited across this lab's releases. Absence means not evidenced, never absent — see data quality.

vision 14
agentic 12
multilingual 10
reasoning 8
coding 5
structured output 1

Releases

  1. Claude Haiku 5.5ClaudeOctober 7, 2026
  2. Claude Sonnet 5.5ClaudeSeptember 28, 2026
  3. Claude Opus 5.5ClaudeSeptember 22, 2026
  4. Claude Fable 5.1ClaudeSeptember 1, 2026
  5. Claude Mythos 5.1ClaudeSeptember 1, 2026
  6. Claude Opus 5ClaudeText in and outImage inputJuly 24, 2026
  7. Claude Sonnet 5ClaudeText in and outImage inputJune 30, 2026
  8. Claude Fable 5ClaudeText in and outImage inputJune 9, 2026
  9. Claude Mythos 5ClaudeText in and outImage inputJune 9, 2026
  10. Claude Opus 4.8ClaudeText in and outImage inputMay 28, 2026
  11. Claude Opus 4.7ClaudeText in and outImage inputApril 16, 2026
  12. Claude Sonnet 4.6ClaudeText in and outImage inputFebruary 17, 2026
  13. Claude Opus 4.6ClaudeText in and outImage inputFebruary 5, 2026
  14. Claude Opus 4.5ClaudeText in and outImage inputNovember 24, 2025
  15. Claude Haiku 4.5ClaudeOctober 15, 2025
  16. Claude Sonnet 4.5ClaudeText in and outImage inputSeptember 29, 2025
  17. Claude Opus 4ClaudeText in and outImage inputMay 22, 2025
  18. Claude 3.7 SonnetClaudeText in and outImage inputFebruary 24, 2025
  19. Claude 3.5 SonnetClaudeText in and outImage inputJune 21, 2024
  20. Claude 3 OpusClaudeText in and outImage inputMarch 4, 2024
  21. Claude 2ClaudeText in and outJuly 11, 2023
  22. Claude 1ClaudeText in and outMarch 14, 2023

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