Post
mr. TIM
timkellogg.me
did:plc:ckaz32jwl6t2cno6fmuw2nhn
Sonnet 4.5 is not fungible
Cognition had to rewrite Devin for Sonnet 4.5 because:
- it’s aware of its own context length and will aggressively summarize near the end
- it externalizes thoughts & observations into files
https://cognition.ai/blog/devin-sonnet-4-5-lessons-and-challenges#what-were-exploring-next
2025-09-29T23:35:38.254Z