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Document unofficial derivative status, attribution, and modifications

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  1. CHANGES.md +37 -0
  2. NOTICE +22 -0
  3. README.md +11 -1
CHANGES.md ADDED
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+ # Modifications to upstream Qwen material
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+
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+ This distribution contains files modified by JetBrains from Qwen models developed by Alibaba Cloud. This document records the modifications and identifies the affected model files; it accompanies the binary artifacts listed below.
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+
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+ ## Base model merge
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+
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+ The base model is a 50/50 combination of Qwen3.6-27B and Qwen3.8-27B, created by linearly interpolating their checkpoint parameters. The configuration, tokenizer, processor, and chat template are retained from Qwen3.8-27B. Exact source revisions and merge settings are recorded in [merge-manifest.json](merge-manifest.json).
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+
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+ The interpolation uses float32 accumulation. Upstream sources:
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+
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+ - [Qwen/Qwen3.6-27B](https://huggingface.co/Qwen/Qwen3.6-27B/tree/6a9e13bd6fc8f0983b9b99948120bc37f49c13e9), revision `6a9e13bd6fc8f0983b9b99948120bc37f49c13e9`, weight 0.5.
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+ - [Qwen/Qwen3.8-27B](https://huggingface.co/Qwen/Qwen3.8-27B/tree/1d4bf0f2ff6012fd82039f2fa52739d0dd7c60c0), revision `1d4bf0f2ff6012fd82039f2fa52739d0dd7c60c0`, weight 0.5.
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+
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+ ## Distribution-specific changes
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+
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+ The merged checkpoint was converted to GGUF and quantized to IQ3_S, Q4_K_M, and Q5_K_M from one BF16 intermediate, without an importance matrix. Each main GGUF retains the native MTP head. The vision encoder and projector were converted to a separate BF16 GGUF. Published filenames were updated to the JetBrains blend name.
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+ Exact conversion settings and runtime versions are recorded in [conversion-manifest.json](conversion-manifest.json). Historical source identifiers in the manifests are retained for reproducibility.
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+
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+ ## Modified model artifacts
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+
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+ The following files contain the merged parameters and, where applicable, the format conversions described above. SHA-256 values identify the binaries to which this modification notice applies.
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+
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+ | File | SHA-256 |
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+ |---|---|
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+ | `Qwen3.8-3.6-27B-blend-IQ3_S.gguf` | `94cc60e6ba6150003ae956d5a98c3914e8d9fe18ecafc3fe400e00232c8cecd2` |
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+ | `Qwen3.8-3.6-27B-blend-Q4_K_M.gguf` | `5f54ded85a78f11ad7a1c02d17564a268238ac8afe9b3d94fb0b614e473006a1` |
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+ | `Qwen3.8-3.6-27B-blend-Q5_K_M.gguf` | `d095b2807e5b120b57caf6a6c4bfeddf17f3ebf605279a64fe3a0fcb98722ba0` |
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+ | `mmproj-Qwen3.8-3.6-27B-blend-BF16.gguf` | `4568f7e9f79ef5b942be9acc8be717156482d0659a6fde111df660f57a1875c8` |
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+
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+ ## Documentation and attribution — 2026-09-15
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+ Model cards and repository references were adapted for the JetBrains distribution. The model cards now prominently identify this release as an unofficial JetBrains derivative and disclose the absence of Alibaba affiliation or endorsement. NOTICE and this modification record were added. This documentation update does not alter model artifacts, runtime configuration, or provenance manifests.
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+ The original Qwen LICENSE and Alibaba Cloud copyright notice are retained unchanged. Neither pinned upstream source contains a NOTICE file; this distribution's NOTICE was added by JetBrains.
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+ Copyright 2026 JetBrains N.V. applies only to original material contributed by JetBrains. Upstream Qwen material remains subject to its original copyright and attribution notices. See [LICENSE](LICENSE) and [NOTICE](NOTICE).
NOTICE ADDED
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+ Qwen3.8-3.6-27B-blend-GGUF
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+ This distribution incorporates material from Qwen3.6-27B and
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+ Qwen3.8-27B, developed by Alibaba Cloud.
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+ Copyright 2026 Alibaba Cloud
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+ Original material contributed by JetBrains:
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+ Copyright 2026 JetBrains N.V.
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+
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+ The JetBrains copyright notice applies only to original material
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+ contributed by JetBrains. It does not apply to upstream Qwen
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+ material or other third-party material.
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+
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+ This is an unofficial derivative prepared by JetBrains. This release
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+ is not affiliated with, sponsored by, or endorsed by Alibaba Cloud
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+ or Alibaba Group. References to Qwen and Alibaba identify the
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+ upstream models and their origin.
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+
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+ Distributed under the Apache License, Version 2.0.
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+ See LICENSE for the license terms and CHANGES.md for a description
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+ of the modifications.
README.md CHANGED
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  # Qwen3.8-3.6-27B-blend GGUF
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  IQ3_S, Q4_K_M, and Q5_K_M conversions of [JetBrains/Qwen3.8-3.6-27B-blend](https://huggingface.co/JetBrains/Qwen3.8-3.6-27B-blend/tree/f1a19acf58aa8caf7a0a507c9083245f79944dcc), pinned to revision `f1a19acf58aa8caf7a0a507c9083245f79944dcc`.
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- The source is a 50/50 linear merge of Qwen3.6-27B and Qwen3.8-27B. Original merge provenance is in `merge-manifest.json`.
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  | File | Size (decimal GB) | Contents |
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  |---|---:|---|
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  On the first arithmetic smoke request, Q4_K_M accepted 98/114 drafted tokens (86.0%) and Q5_K_M accepted 78/93 (83.9%). These are individual smoke results, not comparative quality or speed benchmarks. No BF16 parity or broad quality evaluation is claimed.
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  IQ3_S was added on 2026-09-15 using the same BF16 intermediate and llama.cpp revision. It passed the same functional checks with thinking and native MTP enabled. Its arithmetic smoke request accepted 113/144 drafted tokens (78.5%). This is a smoke-test observation, not a quality or performance benchmark. The exact artifact SHA256, input SHA256, and validation results are recorded in `conversion-manifest.json`.
 
 
 
 
 
 
 
 
 
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  # Qwen3.8-3.6-27B-blend GGUF
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+ **Unofficial JetBrains derivative.** This model was prepared by JetBrains using Qwen models developed by Alibaba Cloud. This release is not affiliated with, sponsored by, or endorsed by Alibaba Cloud or Alibaba Group.
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+
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  IQ3_S, Q4_K_M, and Q5_K_M conversions of [JetBrains/Qwen3.8-3.6-27B-blend](https://huggingface.co/JetBrains/Qwen3.8-3.6-27B-blend/tree/f1a19acf58aa8caf7a0a507c9083245f79944dcc), pinned to revision `f1a19acf58aa8caf7a0a507c9083245f79944dcc`.
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+ The base model is a 50/50 combination of Qwen3.6-27B and Qwen3.8-27B, created by linearly interpolating their checkpoint parameters. The configuration, tokenizer, processor, and chat template are retained from Qwen3.8-27B. Exact source revisions and merge settings are recorded in [merge-manifest.json](merge-manifest.json). See [conversion-manifest.json](conversion-manifest.json) for conversion settings and runtime versions.
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  | File | Size (decimal GB) | Contents |
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  |---|---:|---|
 
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  On the first arithmetic smoke request, Q4_K_M accepted 98/114 drafted tokens (86.0%) and Q5_K_M accepted 78/93 (83.9%). These are individual smoke results, not comparative quality or speed benchmarks. No BF16 parity or broad quality evaluation is claimed.
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  IQ3_S was added on 2026-09-15 using the same BF16 intermediate and llama.cpp revision. It passed the same functional checks with thinking and native MTP enabled. Its arithmetic smoke request accepted 113/144 drafted tokens (78.5%). This is a smoke-test observation, not a quality or performance benchmark. The exact artifact SHA256, input SHA256, and validation results are recorded in `conversion-manifest.json`.
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+ ## License and attribution
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+ Distributed under the Apache License, Version 2.0. The original Qwen [LICENSE](LICENSE), including `Copyright 2026 Alibaba Cloud`, is retained unchanged.
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+ Copyright 2026 JetBrains N.V. This notice applies only to original material contributed by JetBrains. Upstream Qwen material remains subject to its original copyright and attribution notices.
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+ See [NOTICE](NOTICE) for attribution and [CHANGES.md](CHANGES.md) for a description of the modifications and the affected files.