THE EVIDENCE LEDGER
Is Claude Opus 5.5 cheaper for real work?
Provider comparison, not a universal ranking. External evaluations do not establish performance on your workflow.
What was claimed?
Anthropic says Opus 5.5 matches Fable 5.1 on most work, at 40% lower cost than Opus 5.
What does the evidence support?
Company claim, independent confirmation unresolved
Price and capability can move independently. Test the cost per successful task, including retries, before switching.
What are the limits?
Provider comparison, not a universal ranking. External evaluations do not establish performance on your workflow.
Claim or evidence date: 2026-09-22. Last verified: .
Colors classify evidence; they do not rank truthfulness. Explore hype versus reality →