The world of AI is exciting, but there are plenty of expensive pitfalls ready to catch out the unwary, as one Register reader found when taking Anthropic's Claude Opus for a spin courtesy of Amazon Bedrock. Our reader managed to run up Bedrock charges totaling $30,141.33 in April 2026, despite using AWS Cost Anomaly Detection (CAD) to avoid any nasty surprises. Thirty-three days before our reader's first use of Bedrock, the threshold in CAD was …