Cursor releases Composer 2.5 as its most powerful model with gains in intelligence and reliability
Cursor announced Composer 2.5 as its most powerful model to date. The update improves intelligence, sustained performance on long-running tasks, and reliability with complex instructions. Cursor doubles included usage allowances for the next week. The model builds on the Kimi base with 85 percent of total compute devoted to additional training and reinforcement learning. It was partially trained on Colossus 2 and begins joint work with SpaceXAI on a larger model using 10 times more compute and Colossus 2's million H100-equivalent capacity. Benchmarks include Terminal-Bench, SWE-Bench Multilingual, and CursorBench.
#68clem 🤗@CLEMENTDELANGUEVery cool to see Cursor doubling down on training great models. In my opinion, ultimately all serious companies in AI will want to train models themselves, based on open-source instead of outsourcing AI to others via APIs!
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#76Elon Musk@ELONMUSKTry it out!
(Partially trained on Colossus 2)
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#357Boris Power@BORISMPOWERGreat work - exciting to see you training a very powerful coding model!
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#506Michael Truell@MNTRUELLComposer 2.5 is a significant step up from Composer 2.
This is the very start of our work with SpaceXAI. Hope to have more improvements out soon.
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#583Niklas Muennighoff@MUENNIGHOFFComposer 2.5 sits on the Pareto frontier
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
@ericzakariasson looks good
eric zakariasson@ericzakariassoncomposer 1 was fast composer 2 was fast and intelligent composer N:
#978Jacob Jackson@JBFJAOur new model is out. It stacks up nicely against the frontier!
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#980Lisan al Gaib@SCALING01yeah that's pretty good
xAI might be able to cook with Cursor data + 10T model
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#1086Ashvin Nair@ASHVINAIRWe just trained another really really good model, please try it! Frontier intelligence + very fast
#1245Alex Volkov@ALTRYNENew Composer from Cursor team! Great to see their ack. to the Kimi base + how much they moved the model forward!
This isn't the one they are training on XAI Colossus, that one is coming and would likely slap hard!
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#1318Sam Whitmore@SJWHITMOREcomposer 2.5 is really really great. I had it on last week for some testing, forgot that it was on, & totally didn’t realize I wasn’t on gpt 5.5 (my usual) for a while. the team did a fantastic job!!
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#1733Ryo Lu@RYOLU_frontier smart extremely efficient Composer 2.5 is here
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
#1749Sualeh Asif@SUALEHASIF996We've gotten really really good at RL. Composer 2.5 is fighting well-above its weight class.
Very excited for the next release as we scale model sizes and FLOPs with @SpaceXAI!
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
@ericzakariasson Fat slow and genius
eric zakariasson@ericzakariassoncomposer 1 was fast composer 2 was fast and intelligent composer N:
#1965eric zakariasson@ERICZAKARIASSONcomposer 1 was fast composer 2 was fast and intelligent composer N:
Cursor@cursor_aiIntroducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
