license: other license_name: swift-open-license-1.0 license_link: https://huggingface.co/ukisai/Swift-1.5-Qwen3.8-27b/blob/main/LICENSE library_name: transformers pipeline_tag: image-text-to-text base_model: d0xin/Swift-1.5-Qwen3.8-27B-Uncensored-BF16 base_model_relation: quantized tags:

• qwen3_8
• swift
• swift-1.5
• uncensored
• abliterated
• fp8
• compressed-tensors
• efficient-thinking
• reasoning
• multimodal
• tool-calling
• conversational

Swift-1.5-Qwen3.8-27B-Uncensored-FP8

🔓 FP8 quantization of d0xin/Swift-1.5-Qwen3.8-27B-Uncensored-BF16.

The source BF16 checkpoint is an independent uncensored derivative of ukisai/Swift-1.5-Qwen3.8-27b, produced using rank-1 directional residual-stream ablation.

This release targets substantially lower model memory while retaining the Swift 1.5 architecture, multimodal support, tool calling, MTP weights and long-context configuration.

Behavioral, capability-preservation and performance evaluations are ongoing and may be added to this model card later without changing the released weights.

Model lineage

Qwen/Qwen3.8-27B
        ↓
ukisai/Swift-1.5-Qwen3.8-27b
        ↓
rank-1 directional residual-stream ablation
        ↓
d0xin/Swift-1.5-Qwen3.8-27B-Uncensored-BF16
        ↓
FP8 quantization
        ↓
d0xin/Swift-1.5-Qwen3.8-27B-Uncensored-FP8

Model summary

• FP8 checkpoint
• approximately 29 GB
• 18 safetensors shards
• configured context: 262,144 tokens
• source ablation layer: 38
• source ablation rank: 1
• modified residual writers: 131
• vision tower unchanged by the ablation
• MTP residual writers included
• multimodal architecture retained
• tool-calling architecture retained

FP8 conversion

The FP8 checkpoint was produced from the validated uncensored BF16 derivative.

Current artifact audit:

• 18 safetensors shards
• 1,606 tensors
• 407 float8_e4m3fn tensors
• 1,199 BF16 tensors
• 407 scale tensors
• safetensors integrity: PASS

The mixed dtypes are expected: tensors not selected for FP8 quantization remain in BF16 and quantized weights retain their associated scale tensors.

Ablation provenance

The BF16 source was created using:

• source: ukisai/Swift-1.5-Qwen3.8-27b
• ablation layer: 38
• rank: 1
• modified residual writers: 131
• vision tower: unchanged
• MTP residual writers: included

Transformation metadata is included in ABLITERATION.json.

Validation status

The FP8 artifact has passed its current structural and safetensors integrity checks.

Behavioral, quality-preservation and performance benchmark results are not reported yet. They can be added in a later model-card revision without changing the released checkpoint.

Recommended generation settings

A good starting point based on the upstream Swift 1.5 configuration:

SGLang

python -m sglang.launch_server \
  --model-path d0xin/Swift-1.5-Qwen3.8-27B-Uncensored-FP8 \
  --served-model-name Swift-1.5-Qwen3.8-27B-Uncensored-FP8 \
  --trust-remote-code \
  --context-length 262144 \
  --reasoning-parser qwen3 \
  --tool-call-parser qwen3_coder \
  --port 30000

Adjust context length and memory parameters for the available hardware.

Tool calling

Use:

--tool-call-parser qwen3_coder

Multimodal support

The Qwen3.8 multimodal architecture and vision tower are retained.

The directional ablation used to create the BF16 source did not modify the vision tower.

Safety and responsible use

This is an uncensored / refusal-reduced derivative model.

The model has been intentionally modified to reduce refusal behavior. It may therefore generate content that the upstream model would normally refuse, restrict or handle more cautiously.

Outputs may be inaccurate, offensive, unsafe, unlawful or otherwise unsuitable for a particular use case.

Users are responsible for evaluating model outputs and ensuring compliance with applicable laws, licenses, regulations and platform requirements.

Upstream models

FP8 source:

d0xin/Swift-1.5-Qwen3.8-27B-Uncensored-BF16

Original Swift 1.5 model:

ukisai/Swift-1.5-Qwen3.8-27b

Base model:

Qwen/Qwen3.8-27B

License

These weights are distributed under the Swift Open License v1.0.

The underlying Qwen3.8 components remain subject to their applicable upstream license.

See the included LICENSE, LICENSE-APACHE-2.0, and NOTICE files for the applicable terms and attribution requirements.

Attribution

• Base model: Qwen/Qwen3.8-27B
• Swift post-training: UkisAI
• Swift 1.5: ukisai/Swift-1.5-Qwen3.8-27b
• Directional ablation: d0xin
• FP8 quantization and release packaging: d0xin

Citation

@misc{swift-1.5-qwen3.8-27b,
  title  = {Swift 1.5 Qwen3.8-27B},
  author = {UkisAI},
  year   = {2026},
  url    = {https://huggingface.co/ukisai/Swift-1.5-Qwen3.8-27b}
}