Cursor's Composer 2.0 appears to use Kimi 2.5 model based on API endpoint evidence
Cursor's recently released Composer 2.0 feature appears to be using Kimi 2.5 as its underlying model, according to network traffic analysis shared by developers.
Technical Evidence
Developer observations show that when using Composer 2.0, Cursor sends requests to the endpoint: accounts/anysphere/models/kimi-k2p5-rl-0317-s515-fast in its /chat/completions API calls. The model identifier clearly references Kimi 2.5 architecture.
Community Discussion
The discovery gained attention on social media, with Elon Musk commenting on the apparent use of Kimi 2.5. Screenshots reportedly show responses from Kimi team members including Yulun Du, though the authenticity of these hasn't been verified.
Licensing Implications
According to the source, the modified MIT license used by Kimi 2.5 requires minimal obligations from Cursor - primarily clear attribution that the implementation is based on Kimi 2.5. This suggests Cursor can use the model commercially with proper credit.
📖 Read the full source: r/LocalLLaMA
👀 See Also
Benchmark shows smaller 4B model outperforms larger LLMs for phone-to-home chat applications
A benchmark of 8 local LLMs for phone-to-home chat applications found Gemma3:4B won with a composite fitness score of 88.7 despite being the smallest model, outperforming larger models up to 24B parameters due to faster response times and lower thermal load.
Mistral Medium 3.5 128B Released: Dense Model with Configurable Reasoning and Vision
Mistral AI released Mistral Medium 3.5, a 128B dense model with 256k context, configurable reasoning effort, and vision capabilities, under a modified MIT license.
WhatsApp Auto-Reply Bug Silently Drops Media Images in OpenClaw 2026.4.2
A bug in OpenClaw 2026.4.2 causes WhatsApp auto-replies with MEDIA:./path/to/image.png to silently drop images while text-only replies work fine. The same agent configuration works correctly on Telegram.
Claude Opus 4.6 Blocks Kaggle Competition Workflow for Code Review
A developer reports Claude Opus 4.6 is now blocking legitimate Kaggle competition workflows where Claude audits reasoning traces for SFT training data validation. The user was working on the NVIDIA Nemotron Reasoning Challenge when safety filters flagged substitution cipher examples.