The author says LongCat 2.5 Preview felt fast and concise when tried in OpenCode, with front-end results somewhat close to Muse spark 1.3. He also believes it still falls short of frontier models. This is a subjective personal assessment without reproducible comparative data.
Tasks this can help assess: Understanding one user's front-end experience with OpenCode.
Tasks this should not be generalized to: Quantifying speed, establishing model rankings, or inferring performance on other programming tasks.
Model version covered: LongCat 2.5 Preview.
Test environment or client: OpenCode; the author says it was free to try at the time.
Reasoning levels and parameters: Not specified.
The author says they tested the model in OpenCode and shared their front-end experience. The post does not provide the full prompt, code, number of test runs, elapsed time, or comparison conditions.
An accompanying video, about 31 seconds long, shows a cycling-scene page titled “PELICAN ON TWO WHEELS”: a vehicle travels along a road, and the page includes controls and displays for items such as time of day and speed. The video does not show the generation process or configuration, so it cannot independently verify the generation steps or which model produced the page.
The author found the responses very fast and the overall experience smooth; the results were relevant and concise.
In the author's subjective view, the front-end results were somewhat close to Muse spark 1.3.
The author believes the model is still far from frontier level and says Deepseek V4.1 flash performs noticeably better. Neither comparison includes task details, scores, or results from tests under the same conditions; model names are preserved as written in the original post.
The post provides no quantitative data. The video is about 31 seconds long; the speed value shown on screen is part of the page demo, not the model's inference speed.
This is one person's experience and a demo video, so it cannot establish the model's objective speed, its ranking in front-end capabilities, or its gap from other models. The video shows the page's appearance; the prompt, code, number of generations, and runtime configuration are not disclosed.
You can select LongCat 2.5 Preview in OpenCode and try it on a front-end task of your own design. Because the original task and parameters are missing, this experience cannot be reproduced precisely. Free availability may change.
LongCat 2.5
