model
AWS foundation model family whose customization, including reinforcement fine-tuning, is the subject of the post.
No evidence-backed relationships are recorded.
AWS puts prompt caching's saving at up to 90 percent on cache hits; its own ten-question example nets about 75 percent, and only while every request lands inside the five-minute default TTL.
Reality
Bedrock bills for Llama 3.3 70B customisation while publishing no price for it, and the number circulating in third-party guides is a Llama 2 70B rate. A 33-region API sweep found one region that can run the job.
Reality
AWS says three integration decisions carry Natera's phlebotomy booking agent. The reported numbers are good, and they cover a narrower job than "booked appointment".
Reality
A dev.to writeup reports an April 2026 Bedrock invoice of $30,141.33 that textbook AWS Cost Anomaly Detection missed. The controls that matter sit upstream, in mode and region choices.
Reality