Text Generation
GGUF
quantized
quantization
apex
apex-quant
custom-quantization
unsloth-studio
Mixture of Experts
reasoning
llama.cpp
qwen35moe
conversational
imatrix
Instructions to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Notebooks
- Google Colab
- Kaggle
- Local Apps Settings
- llama.cpp
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with llama.cpp:
Install (macOS, Linux)
curl -LsSf https://llama.app/install.sh | sh # Start a local OpenAI-compatible server with a web UI: llama serve -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0 # Run inference directly in the terminal: llama cli -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Install from WinGet (Windows)
winget install llama.cpp # Start a local OpenAI-compatible server with a web UI: llama serve -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0 # Run inference directly in the terminal: llama cli -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Build from source code
git clone https://github.com/ggml-org/llama.cpp.git cd llama.cpp cmake -B build cmake --build build -j --target llama-app # Start a local OpenAI-compatible server with a web UI: ./build/bin/llama serve -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0 # Run inference directly in the terminal: ./build/bin/llama cli -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Use Docker
docker model run hf.co/IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
- Llama new
- LM Studio
- Jan
- vLLM
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with vLLM:
Install from pip and serve model
# Install vLLM from pip: pip install vllm # Start the vLLM server: vllm serve "IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF" # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:8000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF", "messages": [ { "role": "user", "content": "What is the capital of France?" } ] }'Use Docker
docker model run hf.co/IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
- Ollama
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with Ollama:
ollama run hf.co/IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
- Unsloth Desktop
- Pi
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with Pi:
Start the llama.cpp server
# Install llama.cpp: brew install llama.cpp # Start a local OpenAI-compatible server: llama serve -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Configure the model in Pi
# Install Pi: npm install -g @earendil-works/pi-coding-agent # Add to ~/.pi/agent/models.json: { "providers": { "llama-cpp": { "baseUrl": "http://localhost:8080/v1", "api": "openai-completions", "apiKey": "none", "models": [ { "id": "IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0" } ] } } }Run Pi
# Start Pi in your project directory: pi
- Docker Model Runner
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with Docker Model Runner:
docker model run hf.co/IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
- Lemonade
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with Lemonade:
Pull the model
# Download Lemonade from https://lemonade-server.ai/ lemonade pull IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Run and chat with the model
lemonade run user.KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF-Q4_0
List all available models
lemonade list
- Hermes Agent
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with Hermes Agent:
Start the llama.cpp server
# Install llama.cpp: brew install llama.cpp # Start a local OpenAI-compatible server: llama serve -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Configure Hermes
# Install Hermes: curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash hermes setup # Point Hermes at the local server: hermes config set model.provider custom hermes config set model.base_url http://127.0.0.1:8080/v1 hermes config set model.default IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Run Hermes
hermes
- Atomic Chat
- OpenClaw
How to use IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF with OpenClaw:
Start the llama.cpp server
# Install llama.cpp: brew install llama.cpp # Start a local OpenAI-compatible server: llama serve -hf IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0
Configure OpenClaw
# Install OpenClaw: npm install -g openclaw@latest # Register the local server and set it as the default model: openclaw onboard --non-interactive --mode local \ --auth-choice custom-api-key \ --custom-base-url http://127.0.0.1:8080/v1 \ --custom-model-id "IsValorum/KAT-Coder-V2.5-Dev-APEX-I-MiniPlus-V2.1-GGUF:Q4_0" \ --custom-provider-id llama-cpp \ --custom-compatibility openai \ --custom-text-input \ --accept-risk \ --skip-health
Run OpenClaw
openclaw agent --local --agent main --message "Hello from Hugging Face"
Remove third-party user references from model card
Browse files
README.md
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> ### THE DEFINITIVE SPECIFICATION IN THE 13–14 GB CEILING
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> This **APEX-I-MiniPlus-V2.1** release represents the absolute technological limit of sparse Mixture-of-Experts quantization within the **13–14 GB envelope**. Every single tensor of its 40 layers and 256 micro-experts has been mathematically audited to maximize reasoning precision, eliminate recurrence state drift, and prevent AVX2 CPU dequantization stalls.
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> [!TIP]
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> ### 🏆 THE QUANTIZATION SWEET SPOT: Q5–Q6 FIDELITY AT 3-BIT FOOTPRINT
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> **Why APEX-I-MiniPlus V2.1 outperforms standard community quants:**
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- [Model Files & Technical Specifications](#model-specifications)
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- [Empirical Benchmarks & Fidelity Verification](#empirical-benchmarks)
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- [Quality Spectrum: APEX-I-MiniPlus vs. Standard Flat Quants](#quality-spectrum)
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- [Independent Benchmark of the APEX-I-MiniPlus Family (Occamy V2 Reference)](#independent-benchmark)
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- [The 24GB Miracle: Full 256K Context Runs In VRAM!](#context-scaling)
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- [Hardware Throughput & Offload Benchmarks (RTX 30 / 40 / 50)](#throughput-projections)
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- [Surgical Tensor Quantization Map (Audited from GGUF)](#tensor-map)
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---
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<a id="independent-benchmark"></a>
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### 🏅 Independent Benchmark of the APEX-I-MiniPlus Family (Occamy V2 Reference)
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> [!NOTE]
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> **External report:** [zephel01 independently benchmarked Occamy V2](https://note.com/zephel01/n/n71d3d7e6b70c?hl=en). The benchmark below was performed on **Occamy-1.0 APEX-I-MiniPlus V2**, not on this specific V2.1 model. It is included as independent evidence of the broader MiniPlus quantization approach.
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The **APEX-I-MiniPlus** quantization architecture powering this model was subjected to an extensive independent evaluation by Japanese AI researcher and evaluator [zephel01 (CoolZero)](https://note.com/zephel01/n/n71d3d7e6b70c?hl=en) on an **NVIDIA RTX 5090 (32GB)** workstation running `llama.cpp` CUDA `b11027` with FlashAttention (`-fa on -ctk q8_0 -ctv q8_0 -ngl 99`).
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The evaluation tested the APEX-I hybrid MoE engine across **348 unseeded trials** on SWE-bench style multi-file Python bug-fixing tasks with hidden `pytest` suites (`llmbench`):
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- **L6 Multi-File Code Generation (60 tasks):**
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- **Context 32,768 (32K):** **93.3% Resolved** (46/60 tasks passed 5/5 consecutive trials; 20/20 on Easy–Hard).
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- **Context 65,536 (65K):** **90.0% Resolved** (45/60 tasks passed 5/5 consecutive trials).
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- **Match with 25–28 GB Models:** Matches or exceeds the resolution rate of full 25–28 GB models (such as `Ornith-1.5` and `Tiel-Coder` 35B-A3B) while consuming **over 10 GB less VRAM** (14.6 GB vs approx. 26 GB).
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- **Extreme Context VRAM Scaling (The Hybrid DeltaNet SSM Advantage):**
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- **32K Context:** **14.6 GB** total VRAM allocation.
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- **65K Context:** **15.1 GB** total VRAM allocation (only **+0.5 GB VRAM** added when doubling context!).
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- *Architectural Explanation:* Because 30 of the 40 layers utilize Linear Attention / DeltaNet SSM ($O(1)$ constant recurrence memory), only the 10 full-attention anchor layers expand the KV cache. This proves empirically that **65,536 context runs 100% in VRAM on consumer 16GB GPUs (RTX 4080 / RTX 5080)** without offloading to system RAM.
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- **Measured Real-World Throughput:** Sustained single-stream generation of **approx. 247 – 251 tok/s** on NVIDIA RTX 5090.
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<a id="empirical-benchmarks"></a>
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## Empirical Benchmarks & Fidelity Verification
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| **Standard Q3_K_M / Q3_K_S** | 3.44 bpw | **16.2 GB** | approx. +0.40 to +0.85 | Noticeable syntax drop, bracket corruption, and tokenizer classification noise. |
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| **Standard IQ2_S / Generic APEX Mini** | 2.50 bpw | approx. 12.5 GB | approx. +1.50 to +3.00+ | Severe reasoning breakdown, high perplexity spikes in `<think>` chains. |
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## Model Files & Technical Specifications
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| File Name | File Size | Memory Footprint | BPW | Description |
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| Hardware Target | Offload Mode | Generation Speed (Est.) | Prompt Prefill Speed (Est.) | Highlights |
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| **NVIDIA RTX 5080 / 5090 (Blackwell)** | Full GPU (`-ngl 99`) | **approx. 247 – 251 tok/s** | **2,800 – 3,900+ tok/s** | Empirically verified on RTX 5090 by zephel01 (Occamy V2 Reference) |
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| **NVIDIA RTX 4090 (24GB GDDR6X)** | Full GPU (`-ngl 99`) | **90 – 115+ tok/s** | **2,000 – 2,800+ tok/s** | Linear attention layers slash prefill latency |
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| **NVIDIA RTX 3090 (24GB GDDR6)** | Full GPU (`-ngl 99`) | **72 – 88+ tok/s** | **1,500 – 2,200+ tok/s** | Full 256k native window in VRAM |
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| **Workstation / Laptop (DDR4 / DDR5 RAM)** | Hybrid Offload (Few layers in VRAM) | Hardware-dependent | Hardware-dependent | Zero AVX2 CPU stalls; efficient streaming from system RAM |
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| **262,144 (256k)**| `13.74 GiB` | `2.92 GiB` | `2.80 GiB` | **`19.46 GiB`** | **FULL 256K NATIVE IN VRAM!** |
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*Note: Leaves comfortable headroom for display drivers and compute buffers on standard 24GB GPUs (RTX 3090, RTX 4090, RTX 5090).*
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> ### 💡 Empirical 16GB GPU Verification (Single Stream / Desktop)
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> While theoretical multi-slot server buffers estimate approx. 16.5 GiB, independent hardware testing by zephel01 on an RTX 5090 (Occamy V2 Reference) confirmed that single-stream desktop inference consumes **only 14.6 GB at 32,768 ctx** and **only 15.1 GB at 65,536 ctx** (`-ctk q8_0 -ctv q8_0 -fa on`). This empirically proves that **full 65K context runs completely in VRAM on 16GB cards (RTX 4080 / RTX 5080)** without system RAM offload!
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---
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> ### THE DEFINITIVE SPECIFICATION IN THE 13–14 GB CEILING
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> This **APEX-I-MiniPlus-V2.1** release represents the absolute technological limit of sparse Mixture-of-Experts quantization within the **13–14 GB envelope**. Every single tensor of its 40 layers and 256 micro-experts has been mathematically audited to maximize reasoning precision, eliminate recurrence state drift, and prevent AVX2 CPU dequantization stalls.
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> [!TIP]
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> ### 🏆 THE QUANTIZATION SWEET SPOT: Q5–Q6 FIDELITY AT 3-BIT FOOTPRINT
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> **Why APEX-I-MiniPlus V2.1 outperforms standard community quants:**
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- [Model Files & Technical Specifications](#model-specifications)
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- [Empirical Benchmarks & Fidelity Verification](#empirical-benchmarks)
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- [Quality Spectrum: APEX-I-MiniPlus vs. Standard Flat Quants](#quality-spectrum)
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- [The 24GB Miracle: Full 256K Context Runs In VRAM!](#context-scaling)
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- [Hardware Throughput & Offload Benchmarks (RTX 30 / 40 / 50)](#throughput-projections)
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- [Surgical Tensor Quantization Map (Audited from GGUF)](#tensor-map)
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- [Model Inherent Behavior vs. Quantization Fidelity Notice](#quantization-fidelity)
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<a id="model-specifications"></a>
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<a id="empirical-benchmarks"></a>
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## Empirical Benchmarks & Fidelity Verification
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| **Standard Q3_K_M / Q3_K_S** | 3.44 bpw | **16.2 GB** | approx. +0.40 to +0.85 | Noticeable syntax drop, bracket corruption, and tokenizer classification noise. |
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| **Standard IQ2_S / Generic APEX Mini** | 2.50 bpw | approx. 12.5 GB | approx. +1.50 to +3.00+ | Severe reasoning breakdown, high perplexity spikes in `<think>` chains. |
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## Model Files & Technical Specifications
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| File Name | File Size | Memory Footprint | BPW | Description |
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| Hardware Target | Offload Mode | Generation Speed (Est.) | Prompt Prefill Speed (Est.) | Highlights |
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| :--- | :--- | :---: | :---: | :--- |
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| **NVIDIA RTX 4090 (24GB GDDR6X)** | Full GPU (`-ngl 99`) | **90 – 115+ tok/s** | **2,000 – 2,800+ tok/s** | Linear attention layers slash prefill latency |
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| **NVIDIA RTX 3090 (24GB GDDR6)** | Full GPU (`-ngl 99`) | **72 – 88+ tok/s** | **1,500 – 2,200+ tok/s** | Full 256k native window in VRAM |
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| **Workstation / Laptop (DDR4 / DDR5 RAM)** | Hybrid Offload (Few layers in VRAM) | Hardware-dependent | Hardware-dependent | Zero AVX2 CPU stalls; efficient streaming from system RAM |
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| **262,144 (256k)**| `13.74 GiB` | `2.92 GiB` | `2.80 GiB` | **`19.46 GiB`** | **FULL 256K NATIVE IN VRAM!** |
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*Note: Leaves comfortable headroom for display drivers and compute buffers on standard 24GB GPUs (RTX 3090, RTX 4090, RTX 5090).*
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