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xAI releases Composer 2.5 model, users report mixed performance

By PulseAugur Editorial · [11 sources] ·

xAI has released Composer 2.5, an AI model designed for long-running tasks and complex instructions, integrated within its Grok Build platform. Users on platforms like Reddit's r/cursor community have shared varied experiences with Composer 2.5, with some praising its performance and cost-effectiveness compared to other models like Opus and GPT-5.5, while others noted occasional issues with speed, cost, and output quality. AI

IMPACT Composer 2.5's release and user feedback may influence the cost-performance expectations for AI models in development workflows.

RANK_REASON xAI is a frontier lab, and this is a new model release with system card.

Read on r/cursor →

AI-generated summary · Google Gemini · from 11 sources. How we write summaries →

xAI releases Composer 2.5 model, users report mixed performance

COVERAGE [11]

  1. X — xAI TIER_1 English(EN) · xai ·

    Get started at https://t.co/bpTHpjivWD and try Composer from the /models menu

    Get started at https://t.co/bpTHpjivWD and try Composer from the /models menu

  2. X — xAI TIER_1 English(EN) · xai ·

    Composer 2.5 is now available inside Grok Build.

    Composer 2.5 is now available inside Grok Build. Composer 2.5 is a fast, highly intelligent model that excels on long-running tasks and following complex instructions. https://t.co/x7k4zVuVdW

  3. r/cursor TIER_2 English(EN) · /u/Interesting_Price410 ·

    Composer 2.5

    <!-- SC_OFF --><div class="md"><p>Holy shit it's good. I still use opus and 5.5 for difficult tasks but for 90% of my work I just use composer now.</p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/user/Interesting_Price410"> /u/Interesting_Price41…

  4. r/cursor TIER_2 English(EN) · /u/Electrical_Pea_943 ·

    Can't wait for Composer 2.7 to drop 🤪

    <table> <tr><td> <a href="https://www.reddit.com/r/cursor/comments/1u4jyfk/cant_wait_for_composer_27_to_drop/"> <img alt="Can't wait for Composer 2.7 to drop 🤪" src="https://preview.redd.it/h6ixfj3myz6h1.jpeg?width=320&amp;crop=smart&amp;auto=webp&amp;s=c50190daf659e3a0a5a37602a0…

  5. r/cursor TIER_2 English(EN) · /u/NoFaithlessness951 ·

    Composer 2.5 is 1.5x slower than the fast version, but a lot cheaper

    <table> <tr><td> <a href="https://www.reddit.com/r/cursor/comments/1u488zr/composer_25_is_15x_slower_than_the_fast_version/"> <img alt="Composer 2.5 is 1.5x slower than the fast version, but a lot cheaper" src="https://preview.redd.it/h3jeyq1u6x6h1.png?width=140&amp;height=140&am…

  6. r/cursor TIER_2 English(EN) · /u/Tyaigan ·

    Can a community dev please tease us a little about Composer 3?

    <!-- SC_OFF --><div class="md"><p>I'm having the time of my life with Composer 2.5, already doing almost everything I want, way good enough for my needs.</p> <p>But I won't deny an upgrade!</p> <p>Do we have any news? Any semblance of a timeline for the next thing?</p> </div><!--…

  7. r/cursor TIER_2 English(EN) · /u/Expert_Bit6290 ·

    Composer 2.5 is phenomenal. So is cusror 3.0

    <!-- SC_OFF --><div class="md"><p>I know everyone has been pissed recently about Cursor 3.0 ditching (or hiding) the traditional IDE setup to push toward &quot;agentic development.&quot; But honestly? Cursor is better than ever right now.</p> <p>No matter which plan you pick, Com…

  8. r/cursor TIER_2 English(EN) · /u/EliteEagle76 ·

    Okay, dust has settled now, hows your experience with composer 2.5 so far?

    <!-- SC_OFF --><div class="md"><p>when are you using it? What is it good at? Bad at?</p> <p>What kinda prompt works? Do you paired it up with plan by heavy and more intelligent model like opus or gpt 5.5 or opus 4.8? does it able to produce good code quality output?</p> <p>What w…

  9. r/cursor TIER_2 English(EN) · /u/voltron2112 ·

    Composer 2.5 might be better than I thought

    <!-- SC_OFF --><div class="md"><p>So I've been using composer-2.5 heavily for 2 weeks now and it does make stupid mistakes sometimes and I have to guide it quite a bit, and I use the /thermo-nuclear-code-quality-review skill a lot after doing work to help with quality. But I've b…

  10. r/cursor TIER_2 English(EN) · /u/Sweet_Ad_842 ·

    Composer 2.5 today

    <!-- SC_OFF --><div class="md"><p>Was it just me, or was Composer spazzing out today? Had multiple instances of files getting corrupted (looks like Keep File didn’t apply all the way?) multiple instances of random deletions, hallucinations I have not seen before… is 3.0 about to …

  11. r/cursor TIER_2 English(EN) · /u/SlopTopZ ·

    composer 2.5 is actually solid if you can tolerate some bugs

    <!-- SC_OFF --><div class="md"><p>5.5 xhigh user here. been running it daily for months and it's great when it works but the cyber security risk bullshit finally broke me</p> <p>you know the drill. random reroutes, false positives, model suddenly deciding your legit repo is suspi…

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