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Claude Opus 5.5

1806 points · 1134 comments · km144

  1. sailingparrot · · focus · HN ↗
    > Claude Opus 5.5 is our first release since we called for pacing the frontier.

    Interesting how the very first line is used to remind the reader of their call to pace the frontier just last week, and everything else after that line is to demonstrate with very specific numbers how they absolutely are not pacing.

    1. mukmuk · · focus · HN ↗
      “Pacing the frontier” sounds smarmy and weird, like the phrase was generated by Claude itself
      1. DiggyJohnson · · focus · HN ↗
        I really don't think it's productive for internet forums to constantly be criticizing language choice when the meaning is clear. Better to respond to the substance of the issue than word choice.

        Edit: In response to the initial replies. To me it clearly means "releasing frontier models at any pace less than as fast as possible". It implies relative restraint compared to the previous state and without stating the degree of restraint.

        1. post-it · · focus · HN ↗
          Is the meaning clear? Nobody would use "pacing" in this way. I only know what it means because I've seen previous press releases; if someone told me they wanted to pace the frontier I would have no idea what they mean.

          I'm on the fence about calling out AI-isms but I think it's definitely worthwhile to call out ones that actually don't make sense.

          1. sigmar · · focus · HN ↗
            It makes sense to me. If you 'pace your running', you're setting the speed intentionally. The phrasing doesn't describe whether it is fast pace or a slow pace, but it describes having a goal and not just winging it.
            1. nradov · · focus · HN ↗
              That analogy doesn't hold up. In running you have to pace yourself to avoid falling apart later in the race. It's a strategy to maximize net speed across the entire race. But what Anthropic is doing is a cynical attempt to create an industry cartel or convince governments to impose legal restrictions in order to maximize their own profitability. They're afraid of running out of the capital necessary to stay in the race.
              1. TeMPOraL · · focus · HN ↗
                > They're afraid of running out of the capital necessary to stay in the race.

                So, they're pacing themselves. And since they're the frontier roughly 33%+ of the time, they're "pacing the frontier" at least that much.

                Less cynical and more true interpretation also holds: they are trying to slow down AI progres to give people better chance to keep up (see Hugging Face incident, and whatever was that Anthropic incident the other day). They'd ideally like the AI progress to stop soon, but of course they'd also like to come out ahead of everyone, so for various (more or less self-serving) reasons they don't want to close shop completely - hence, pacing.

                1. phlakaton · · focus · HN ↗
                  Are they? And how would you know if they were?
                2. mupuff1234 · · focus · HN ↗
                  If they're trying to slow down AI progress why did they release a new model? What's the rush?
                  1. TeMPOraL · · focus · HN ↗
                    The tension between slowing down the overall race, while not losing 1st place.

                    Also note that this release isn't a model capability improvement, but a cost and efficiency (and style) improvement.

                    1. mupuff1234 · · focus · HN ↗
                      So they care more about being 1st place than slowing down the race.
                      1. TeMPOraL · · focus · HN ↗
                        They care about both, and those goals are intertwined. Mirroring the core of alignment problem itself, the only way to have influence on the pace of the race is to be one of the winning players - if they fall off to the back, they cannot do anything about it anymore.
                        1. mupuff1234 · · focus · HN ↗
                          > the only way to have influence on the pace of the race is to be one of the winning players

                          Yeah I don't buy that, every additional player is just adding fuel to the fire.

                          Would the cold war be "safer" if it were US, Russia and a 3rd player? Of course not, it would just make it harder to coordinate any safety measures.

              2. idiotsecant · · focus · HN ↗
                I don't know what everyone is getting so mad about. This is a well defined concept. A pace car deliberately sets the pace of the race under dangerous conditions, regulating how fast people can go.

                You are all getting mad about absolutely the dumbest thing when there are giant things to be worried about here.

                1. nradov · · focus · HN ↗
                  You appear to be confused about the concept. Depending on the context, pacing or pace setting can mean either slowing things down or speeding them up relative to what the natural pace would have otherwise been. The commenters here aren't necessarily mad, just calling out Anthropic for being unethical in trying to artificially slow down competition by lying about fake dangers. (And I actually really like Anthropic's products.)
                2. victorhooi · · focus · HN ↗
                  I think it's less mad - and more pointing out the obvious elephant in the room.

                  1. It's just bad communication, full stop - just look at the comments here, even people allegedly in support of Anthropic are all arguing over what the phrase is even meant to mean.

                  2. It's flowery language and oddly out of place - which yes, can be triggering for people who have to deal with Claude doing this as well.

                  Claude seems overly apt to reach for "coinages", or neologism (yes, aha, I learnt that phrase, after spending time dealing with Claude...). It will create some made-up phrase to describe an otherwise dry, scientific CS concept, and nobody seems to know why. Surely it can't be user-focus groups?

                  So it would be peak-AI if somehow, the Anthropic communications team was also using Claude to author these blog posts, about how they were "pacing the frontier" - which either means they're betting big on AI, and going at it faster than OpenAI...or maybe it means they need to slow down releases, because it's too buggy...or maybe it means they're worried about regulatory capture? I honestly have no idea.

                  It's like the whole "Advancing Our Amazing Bet" corporate-speak from my old bosses - maybe they were trying to soften the blow or something, or be nice, but it ended up just confusing the heck out of everybody.. (Spoiler alert - the phrase actually meant they were shutting the whole thing down)

                  1. manlymuppet · · focus · HN ↗
                    Forgive me for the petulance, but my God, who cares? Why? This is so, so trivial.
                3. jamiek88 · · focus · HN ↗
                  That’s called a safety car in most of the world and in the Himalayas, Chinese and Indian soldiers pace the frontier all day long.
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