UltraLong Thinking is an open-source language model by mergekit-community. Features: 8b LLM, VRAM: 16.1GB, Context: 4192K, Instruction-Based, Merged, LLM Explorer Score: 0.19.
Merged Model Base model:mobiuslabsgmbh/deep... Base model:nvidia/llama-3.1-ne... Conversational Endpoints compatible Instruct Llama Region:us Safetensors Sharded Tensorflow
Model Card on HF 🤗: https://huggingface.co/mergekit-community/UltraLong-Thinking
UltraLong Thinking Benchmarks
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
What is the LLM Explorer Rank (Score)
UltraLong Thinking Parameters and Internals
| LLM Name | UltraLong Thinking |
| Repository 🤗 | https://huggingface.co/mergekit-community/UltraLong-Thinking |
| Base Model(s) | |
| Merged Model | Yes |
| Model Size | 8b |
| Required VRAM | 16.1 GB |
| Updated | 2026-04-11 |
| Maintainer | mergekit-community |
| Model Type | llama |
| Instruction-Based | Yes |
| Model Files | |
| Model Architecture | LlamaForCausalLM |
| Context Length | 4292608 |
| Model Max Length | 4292608 |
| Transformers Version | 4.51.1 |
| Tokenizer Class | PreTrainedTokenizer |
| Vocabulary Size | 129024 |
| Torch Data Type | bfloat16 |
Best Alternatives to UltraLong Thinking
Best Alternatives |
Context / RAM |
Downloads |
Likes |
|---|---|---|---|
| ...otron 8B UltraLong 4M Instruct | 4192K / 32.1 GB | 89 | 119 |
| ...a 3.1 8B UltraLong 4M Instruct | 4192K / 32.1 GB | 176 | 24 |
| ...a 3.1 8B UltraLong 2M Instruct | 2096K / 32.1 GB | 875 | 9 |
| ...otron 8B UltraLong 2M Instruct | 2096K / 32.1 GB | 91 | 17 |
| Cthulhu 8B V1.4 | 1048K / 16.1 GB | 12 | 9 |
| ...otron 8B UltraLong 1M Instruct | 1048K / 32.1 GB | 3440 | 55 |
| ...a 3.1 8B UltraLong 1M Instruct | 1048K / 32.1 GB | 1387 | 29 |
| Zero Llama 3.1 8B Beta6 | 1048K / 16.1 GB | 7 | 1 |
| ...dger Nu Llama 3.1 8B UltraLong | 1048K / 16.2 GB | 10 | 3 |
| ....1 1million Ctx Dark Planet 8B | 1048K / 32.3 GB | 8 | 3 |
Note: green Score (e.g. "73.2") means that the model is better than mergekit-community/UltraLong-Thinking .
Rank the UltraLong Thinking Capabilities
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Original data from HuggingFace, OpenCompass and various public git repos.
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Release v20260328a