Cursor Introduces Composer 2.5(twitter.com)
75 pointsby asar5 hours ago15 comments
  • granzymesan hour ago
    Surprised this got pushed off the front page so quickly! It’s exciting to see what the Cursor team has been able to do with significantly fewer resources than the frontier lab.

    I do wish they weren’t joining xAI. Something tells me there will be a contingent of researchers that departs Cursor if that merger is consummated.

  • memoryleakgamean hour ago
    If these benches from their site hold up (they likely wont)

    Wouldn't this compress ai revenue like 15x quickly

    If they really have a 4.7 opus high equivalent at 1/16 the cost wouldn't this significantly effect all the current capex and planing

    Maybe they are getting elon to cover cost

    • 2001zhaozhao3 minutes ago
      > compress ai revenue like 15x

      that roughly just puts it on par with OpenAI and Anthropic subscriptions in terms of pricing per token

    • infecto10 minutes ago
      The way I have read their benchmark results is that they trained a model to work insanely well in their coding workflow. It’s not a general purpose model.

      One of the surprisingly hardest problems to solve is to get a model to use the tools you give it access to.

    • zackify20 minutes ago
      this thing is so awesome on fast mode, so far i am impressed, some of its observations feel similar to opus.

      i use gpt 5.5 and opus 4.7 a lot every day, if i can get good results at this speed, hopefully the usage level holds up on my team plan haha

  • asar5 hours ago
    The model is (like Composer 2) based on Kimi K2.5 and they claim SOTA performance for 1/10th of the cost. The tweet also mentions that they've started a new model from scratch on Colossus 2 (xAI/SpaceX Cluster). Really impressive how they've made this jump from being called the vscode fork with no moat just a couple of months ago.
    • onlyrealcuzzo4 hours ago
      > Really impressive how they've made this jump from being called the vscode fork with no moat just a couple of months ago.

      Impressive, yes. But they still don't have a moat...

      • infecto15 minutes ago
        I am not sure we should dismiss what they have today. Nobody has yet to come close with a full package ide that works well for coding. Is that not a moat? It is easy for my to in my head discount it, thinking that I could build something myself but between autocomplete and their workflow for agent use, it feels like they have some tangible moat emerging.
      • alach11an hour ago
        Isn't a large user base and the data collected from those users a moat of sorts?
        • onlyrealcuzzo35 minutes ago
          A moat is when you have something other's can't easily get.

          Every MAG 7 / FAANG company already has more users and more data...

          That's not a moat.

          That's traction.

        • AussieWog93an hour ago
          Honestly the data itself is probably worth heaps even in the company itself collapses. Early attention engineering when humans were still in the loop!!!
      • kkukshtel3 hours ago
        And its still just a vscode fork
    • liuliu4 hours ago
      Since the frontier is only 8-month ahead of DeepSeek, it is hard to see how model training can be a moat as all the tricks are available from open labs in China. You really just need <100m to bootstrap at this point.
    • Lionga5 hours ago
      They are still a vscode fork with no moat? Like they lost about 70% of users in half a year which goes to show how there is not even the tiniest of moat.
      • GenerWork4 hours ago
        I feel like they've been targeting enterprise pretty hard. I know my company uses them, and the companies that hire us also use Cursor.
    • 4 hours ago
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    • whywhywhywhy4 hours ago
      It's still a VsCode fork just now with a Kimi fine tune and still no moat...

      I won't debate that it turns out none of this mattered when it came to being as successful company though and kinda makes anyone who tried to roll their own instead of fork look a little silly.

    • aurareturn4 hours ago
      I doubt it's a brand new model. It's likely just Kimi K2.5 further trained on coding.
      • enraged_camel4 hours ago
        They didn't say it's a new model... in fact they said exactly what you just said.
  • PUSH_AX5 hours ago
    They set themselves up for flack when they use whatever these evals are… they did the same for composer 2 which was evaled in close competition with frontier models, spoiler alert, it wasn’t even close in practice.

    So now 2.5 is supposed to compete with opus 4.7? Sure…

    • infecto13 minutes ago
      As I have said before in prior composer threads. The proof is in the usage. I am inclined to somewhat believe the results as I use composer and also take the results for the given context. It’s not a general purpose sota model. It’s a model that runs inexpensively in their coding workflow that is creating results similar to opus or gpt.
    • tuo-lei4 hours ago
      they say it themselves in the post - behavior dimensions "not well captured by existing benchmarks". that was the exact problem with composer 2. not dumber on individual tasks, just bad at session-level decisions like when to stop editing, how much context to carry forward, when to re-read a file vs assume. you don't catch any of that in an isolated eval.
    • criemen4 hours ago
      Well is that a statement about the quality of Opus 4.7 or about compose 2.5? :P
  • jtwaleson4 hours ago
    Ok this might be weird but I've moved everyone in my 4 person team to our team plan and costs seem to have sky rocketed compared to the individual plans. Where before most people spent 20-100 USD, now the total bill is more like 1k USD. I haven't gone into the details but it feels like I'm being scammed.
    • infecto11 minutes ago
      Keep in mind I believe there is a larger buffer given to personal plans. If they have 50% extra with the personal plan you now only get 25%.
    • danbrooks3 hours ago
      Check which model you're using.

      The fast version of composer is the default now (which costs ~x3 as much).

    • PUSH_AX4 hours ago
      My cursor costs sky rocketed recently too
  • lukebrichey2 hours ago
    this feels super bullish on cursor/spacexai's ability to train a frontier level model. could be truly SOTA on coding given that their RL data is this powerful
  • vanuatu4 hours ago
    It's always great that more companies are throwing their hat in the ring, especially focusing on value (latency + intelligence + cost)
  • polski-gan hour ago
    I don't know why their model isn't on Openrouter yet. They must not have enough capacity to offer it.
  • jdlyga5 hours ago
    It's a bit odd that they're not comparing it against Sonnet
    • jjice5 hours ago
      I don't think so. They're comparing it to the highest tier available models from Anthropic and OpenAI. Generally speaking, Opus is better than Sonnet in almost every way, so why have the redundancy?
    • CodingJeebus4 hours ago
      The tweet specifies that the new model is geared towards long-running tasks, which is what you'd use a model like Opus for anyway.
  • svclaws5 hours ago
    Their previous Composer was already marketed as a cheap model capable of competing with SOTA on most tasks. The evals they shared back then backed this up but in my day-to-day usage it fell short across the board. Canceled my cursor subscription and switched to Claude Code a few weeks ago. It has its own shortcomings but in terms of model capability and UX quality Cursor will have a hard time competing in the long term. Elon Musk will be a very good way out for them.
  • re-thc4 hours ago
    Did they just upgrade Kimi 2.5 to 2.6?
  • sergiotapia5 hours ago
    Congratulations on the launch! I'm interested in trying Cursor but it's very confusing what I should buy. What does the Pro $20 plan get me in usage if I only use Composer 2.5? How fast is the model?
    • darkwi11ow4 hours ago
      I use $20 plan on daily basis for more than a year now, and have yet to exhaust that limit. The plan includes $20 in api costs for non-Cursor premium models and $20 for Composer and Auto models provided by Cursor themselves.

      That said, I am pretty old-fashioned coder and use LLM mostly to overcome the blank page problem, which means I review and often rewrite LLM output by hand and avoid prompt loops for a single task.

      People who are aiming to not read code any more might find this $20 plan lacking for their needs, however for my needs it fits perfectly.

      • kaizoku1564 hours ago
        The limits are probably even higher than that, i seem to get about 100$+ of usage on composer and about 45-50 usd on non composer models
  • scuderiaseb5 hours ago
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