The AI lab claims that early testers have found that Opus 4.8 “is more likely to flag uncertainties about its work and less likely to make unsupported claims.” In the company’s evaluations, Opus 4.8 is “around 4x less likely than its predecessor to allow flaws in code it’s written to pass unremarked.”

In addition to the honesty improvements, with Opus 4.8, users can direct the amount of effort Claude puts into a task. Higher-effort responses will use more tokens, giving users the option of lower-effort responses if they don’t want to burn through their rate limits as quickly.

Anthropic is also launching a feature called “dynamic workflows” in research preview, which the company says will let Claude “take on even bigger tasks.” With dynamic workflows, “Claude can plan the work and then run hundreds of parallel subagents in a single session (and with Opus 4.8, the agents can run for even longer). It then verifies its outputs before reporting back to the user.”