Use Claude Sonnet 5.5 only at high effort if you want to save costs. Otherwise Opus 5.5 is the most efficient model out there!
Summary
The article advises using Claude Sonnet 5.5 at high effort to save costs, while claiming that Opus 5.5 is the most efficient model available.
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@cgtwts: please don't nerf Opus 5.5 please don't nerf Opus 5.5 please don't nerf Opus 5.5
Claude Opus 5.5 is introduced as the first model in the Claude 5.5 family, offering performance comparable to Claude Fable 5.1 for most tasks with a 40% reduction in running costs.
Claude Sonnet 5 is both more expensive and less intelligent than Opus 4.8, on Artificial Analysis Index
According to the Artificial Analysis Index, Claude Sonnet 5 is both more expensive and less intelligent than Opus 4.8.
Sonnet 5.5 is worse than Opus 5.5 but costs more?? Sonnet costs the same as Fable 5.1? The reason: Sonnet 5.5 is waaaay less token efficient. Don't be fooled, continue using Opus!
The post compares Sonnet 5.5 and Opus 5.5, stating that Sonnet 5.5 is less token-efficient and more costly, advising users to continue using Opus.
@trq212: Opus 5.5 is the result of your feedback. It communicates clearly, it's cheaper per token than Opus 5.0 with the intelli…
Introducing Claude Opus 5.5, the first model in the Claude 5.5 family, which performs at the level of Claude Fable 5.1 but costs 40% less to run with increased rate limits.
@rohanpaul_ai: Claude Sonnet 5 is more expensive (around +15%) per task than Opus 4.8 and much more expensive (2X) than Sonnet 4.6, ev…
Claude Sonnet 5 costs more per task than previous models due to higher token usage despite lower per-token price, with discounted pricing until August 2026.