Claude Opus 5.5 delivers Fable 5.1 performance – and costs 40% less

Claude Opus 5.5 delivers Fable 5.1 performance - and costs 40% less Anthropic's newest Claude model aims to make frontier AI cheaper, faster, and safer, while giving subscribers more breathing room before those frustrating usage limits kick in. Computer science professor turned AI innovator David Gewirtz has spent over thirty years driving advancements at the forefront of artificial intelligence and is the recipient of the Sigma Xi Research Award in Engineering. Claude Opus 5.5 could be a big win for power users. Developers may see faster coding with fewer steps. Anthropic says the upgrade is safer, cheaper, and less wordy.