Grok 4.5

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• Hacker News
• Isn't this the same Twitter company that was supposed to go bankrupt a few years ago? Now it is somehow part of a Space company that has an AI division inside of it?

  I think we are going to be waiting a long time for Twitter / X to go bankrupt as it was (erroneously) predicted a long time ago.

  by rvz
• I'd say the prediction is correct, as the acquisition is more or less just a better way to capitalize on the bankruptcy.
  by svachalek
• twitter was "acquired" by xAI which was then "acquired" by SpaceX as part of the IPO strategy, (and part of a strategy of giving the investors on the hook for the twitter acquisition a return). Who knows how it performs, but yeah, now that it's the social media arm of the SpaceX conglomerate, it will likely be around for a long time, especially since it serves the basic function of stroking Musk's ego.
  by efficax
• None of them go bankrupt. The whole thing will just get stuffed into a larger Matryoshka egg that IPOs for eleventy trillion dollars in 10 years.
  by ryandvm
• That was the point of the bailout. Twitter is already a rounding error so no one will notice if it goes to zero.
  by wmf
• Twitter was supposed to go bankrupt if you only read news articles from journalists about it. If you looked at Musk's operating track record, you might have had a different opinion.

  In the transaction announcement (xAI buying twitter) twitter reported $12b in debt on acquisition, roughly the amount originally sourced ($13b), so it apparently made good on its debt covenants during the operating period. I have no idea if it received additional capitalization from Musk to do that or not.

  That said, the deal was classic Musk - anybody who went on the equity ride with him in Twitter just KILLLED it; xAI was valued at $80bn and twitter at $33bn, so the owners there became 30% owners of xAI. xAI was acquired for $250bn at a SpaceX valuation of $1 trillion, or 20% of the resulting entity, so the twitter stock was 6% of spaceX at about $2 trillion, or $120bn on an equity purchase price basis of $30bn. and that $120bn in value is on really good daily trading volumes; lots of depth.

  by vessenes
• Not available for Europeans yet. :(
  by maipen
• They say "EU availability is expected in mid-July". So next week or so.
  by busymom0
• xAI is under criminal investigation in the EU
  by pelorat
• I think it should be available through Cursor?

  EDIT: Tested myself, it's actually NOT available from EU. But with a Swiss VPN it works :)

  by Tiberium
• How popular is Grok compared to other companies models for SWE tasks? I almost never hear it talked about against OpenAI's or Anthropic's products
  by tbomb
• If they were a frontier lab, you'd know.
  by bigyabai
• You can very roughly proxy popularity of close-sourced models through OpenRouter token throughput. Grok has an order of magnitude less OpenRouter usage than Claude, GPT, even Gemini.
  by minimaxir
• They were missing a harness like Claude Code or Codex (terminal). However they recently released Grok Build, which is probably the fasted I've used, in terms of responsiveness, but didn't have a model at Opus 4.7/8 level. The thing is if they add 4.5 to Grok Build and keep improving the harness I think it can compete (cheaper and faster).
  by small_model
• Because of the of the political stuff, they have a bad reputation I think and are taken less seriously (I feel this way). They have an opportunity imo to break free from that and just not do the gatekeeping / condescension that the other providers are starting, and become more mainstream.
  by andy99
• Is there a reason the AI companies usually announce new products so close to each other. Like not just the same day but literally hours apart. GPT Live then an hour later Grok 4.5. As if they try to one up. I expect something new from Anhtropic as well today.
  by thrownawaysz
• Competition. You don't want to lose your customers trying out the competitors updated and better product. Release on the same day and they won't be able to compare their new to your old.
  by colechristensen
• I think this one is just a coincidence, bound to happen given the pace of releases

  For exact timing, probably 10-11am Pacific is just optimal for normal working hours

  by conradkay
• Maybe it‘s the Nash equilibrium from a timing perspective?

  Like the reason that close to a McDonals there is usually a Burger King.

  by nfin
• The solar system diagram doesn't work for me. When I click on the planets, it will center on them. When I click on the sun, nothing happens. When I click on a planet next, it goes to the sun.
  by steve_adams_86
• Its remarkable how Anthropic is able to maintain their edge against all competition. Anyone have any idea what the secret sauce is that has Anthropic at the top of all leaderboards for the past few years?
  by czhu12
• because in the real-world, it's far better than the rest. That's why few people use Grok, it's not even close in day to day work.
  by hn1986
• From what I have read, their pre-training team is much better than anyone else. For OpenAI, their post-training team is better. And apparently OpenAI has consistently struggled at training a bigger model than GPT 4 level
  by Handy-Man
• Someone has to know.

  Would be nice if an insider would drop some hints so that the open-source space could make some good progress.

  by nullbio
• Given their pricing, I'd guess their models are just way bigger in parameter count. They've always underperformed in cost-per-performance.

  They also target a cost-insensitive market (corporate/coding users) compared to Google/OpenAI which support massive amounts of free users.

  by x312
• I think it is a mix of the sibling replies here. I'd add that the company has seemed to find ways to ~do more with less.

  I have never liked the various nerfs Anthropic has used to balance GPU (slowing down responses, quota variance, model optimizations etc) and it definitely has burned a lot of good-will.

  But it has seemed that being able to look beyond the short term pitchforks has worked quite well.

  by bredren
• I think it's focus? Anthropic seemed to double down early on being more business/prosumer focused. While OAI, Gemini, Grok, etc were also doing various side quests like image generation, Anthropic seemed to only focus on 1 thing, and that seemed to pay off
  by hello_newman
• I think it's the talent, laser focus on single product set and being early so ahead, same with Open AI who are only a sliver behind. Google, XAI are the next level down but they have other concerns.
  by small_model
• My gut feel is Anthropic is very technical and pedantic which makes their models really technical and pedantic. They're top at code and technical benchmarks but anecdotally I've found OpenAI to be significantly farther ahead for general usage.

  Opus 4.8 will burn 10k tokens trying to answer something 100% whereas GPT-5.5 will burn 2k getting it 90% which is good enough for many things.

  Some personal testing on a "help me find that restaurant" prompt https://gist.github.com/nijave/2873b8b10d8c732e46264237b0755...

  by nijave
• Announcement from Cursor, whose team also trained the model: https://cursor.com/blog/grok-4-5.

  Notably:

  > Grok 4.5 and Composer 2.5 are two different model weight classes, and we're excited to support both sizes and weights. Composer 2.5 will remain offered, and we will release new models of this size going forward.

  by aarvin_roshin