mrzenin/Cortana-4B

VISIONConcurrent Unit Cost:1Model Size:4.5BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Aug 4, 2026License:apache-2.0Architecture:Transformer0.0K Open Weights Featherless Exclusive Cold

mrzenin/Cortana-4B is a 4.5 billion parameter multimodal language model fine-tuned from Qwen 3.5 4B using Unsloth and proprietary Deckard datasets. This model enhances reasoning and output generation, surpassing its base model in benchmarks, and is designed to be fully uncensored and vision-capable. It features a 32768 token context length and is optimized for direct, unrestricted responses.

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Cortana-4B: Uncensored Multimodal AI

Cortana-4B, developed by mrzenin, is a 4.5 billion parameter multimodal language model based on the Qwen 3.5 4B architecture. Fine-tuned with Unsloth and five in-house Deckard datasets, it demonstrates improved reasoning and output generation, outperforming its base model across various benchmarks.

Key Capabilities

  • Uncensored Output: Designed as a "HERETIC" model, it provides unrestricted responses without safety alignment or refusals, significantly differing from the original Qwen model's high refusal rate (4/100 vs. 94/100).
  • Multimodal: Supports vision (image) inputs, with video capabilities noted in the base model but not explicitly tested in this fine-tune.
  • Enhanced Performance: Achieves higher scores than the base Qwen3.5-4B-Instruct model in reasoning benchmarks like ARC, HSWAG, and WINO.
  • Extended Context: Features a 32768 token context length, with the underlying Qwen3.5 model natively supporting up to 262,144 tokens and extensible to 1,010,000 tokens via YaRN scaling.

Good For

  • Use cases requiring unfiltered and direct responses where safety alignments are undesirable.
  • Applications benefiting from improved reasoning and output quality in a 4.5B parameter model.
  • Multimodal tasks involving image understanding.
  • Scenarios needing a long context window for complex queries.