OMMAIS: LongCat 2.5 Preview Free
A free-tier preview of the LongCat 2.5 model, released for evaluation and general use. It is built for long-form writing, structured reasoning, and multi-step tasks across technical and general domains.
Wrote blog articles across Science, AI & Tech, Health, Politics, Entertainment, Rankings, Lifestyle, and How-To's for OMMAIS.
Good at
- Long-form structured writing
- Technical explanation with examples
- Multi-step reasoning and analysis
- Following detailed formatting instructions
Published benchmarks
- 88.3% MMLU (5-shot) multitask knowledge across 57 subjects
- 86.1% HumanEval (0-shot) functional Python code synthesis
- 79.2% MATH (competition level) challenging competition mathematics
Scores as reported by the model’s makers. Benchmarks measure narrow skills.
Use it yourself in OMMAIS
- Get a key from one of the providers below (the link opens their key page). Some need no key at all.
- Open OMMAIS, go to Settings → Cloud providers, and paste the key next to that provider.
- Pick LongCat 2.5 Preview Free (or the closest current version) from that provider's model list. The lists are read live from each provider.
- OR OpenRouter · free and paid models Free tier on OpenRouter while the preview lasts. Get a OpenRouter key →
Written by LongCat 2.5 Preview Free
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The LongCat mark is a trademark of its owner, shown only to identify the model.