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Livenerf: Has Opus 5.5 been nerfed yet?

922 points · 392 comments · bryan0

  1. jug · · focus · HN ↗
    We also have Nerf Bench:

    <a href="https:&#x2F;&#x2F;www.bridgebench.ai&#x2F;nerf-bench" rel="nofollow">https:&#x2F;&#x2F;www.bridgebench.ai&#x2F;nerf-bench

    They test it on launch day, then benchmark it against that. A deviation of above 10% is considered a change. They&#x27;re currently tracking Opus 5.5 and GPT-6 Astra.

    This bench famously detected a degradation of Opus 4.6 which Anthropic later blogged about. I personally think people sense nerfs more often than they happen and that it&#x27;s often about honeymoon effects.

    1. user3939382 · · focus · HN ↗
      Anthropic A&#x2F;Bs my weekly quota amount. So I have an automated prompt that runs at 3 AM with a transcription task, I measure input and output tokens, and weekly&#x2F;5 hour quota before and after. The absolute token counts stay within 0.1% while in mode A it counts for 1% of my 5 hour quota and mode B 4% of my 5 hour quota.
      1. CodesInChaos · · focus · HN ↗
        Could be load dependent, not an A&#x2F;B test.

        Is the fraction of the 5h quote consumed consistent with the fraction of the weekly quota consumed?

        I heard there is a usage tracking tool you can install that tells you if tokens are more or less expensive at the current time.

        1. user3939382 · · focus · HN ↗
          I say A&#x2F;B because when it toggles it does so for days.
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