This checkpoint is an AutoRound model-free MXFP8 RTN quantization of exported in llmcompressor / compressed-tensors format. Routed experts and the self-attention projections present in the source are stored as F8E4M3; sensitive/shared and multimodal weights remain BF16. Static FP8 KV scales were calibrated with AutoRound using the text dataset NeelNanda/pile-10k; the vision tower was not quantized. On the paired repository lmeval protocol, the four primary metrics were non-decreasing relative to the BF16 baseline using the same vLLM FP8 KV cache. The AQA gate was GO. This is a result for those tasks and settings only, not a claim of lossless quantization or general quality improvement. The…
Open-weight model · Text generation
gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound
by INC Optimized Models 4 INCModel4/gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound
gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound is an open-weight model for text generation from INC Optimized Models 4, released under Apache License 2.0. It has 25.8B parameters and a 262,144-token context. At 16-bit it needs about 61.9 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index.
This repository contains an MXFP8-weight checkpoint derived from exported in compressed-tensors format. The checkpoint retains the source multimodal components, but the evaluation reported here covers text tasks only.
Runs On
What it takes to serve gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound (25.8B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.
| Precision | Weights | Memory needed | Cheapest setup | Per hour | Also fits |
|---|---|---|---|---|---|
| 16-bit | 51.6 GB | 61.9 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 8-bit | 25.8 GB | 31.0 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 4-bit | 12.9 GB | 15.5 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Oct 1, 2026.
Model Card
By INC Optimized Models 4, published under apache-2.0, revision 3b54f3a2c7c3.
This repository contains an MXFP8-weight checkpoint derived from exported in compressed-tensors format. The checkpoint retains the source multimodal components, but the evaluation reported here covers text tasks only. The exported checkpoint contains 11,635 F8E4M3 weight tensors, 838 BF16 weight tensors, 11,635 U8 block-scale tensors, and 171 FP32 scale/metadata tensors. Routed-expert weights and source-present text self-attention projections are MXFP8; the router, shared MLP, vision tower, and embeddings remain BF16. Measured on 2026-09-30 with lm-eval 0.4.13 and vLLM 0.29.0. The tested settings were TRITONATTN, tensor parallelism 2, pipeline parallelism 1, batch size 64, maxnumseqs=64…
Read INC Optimized Models 4's full model card
Gemma 4 26B-A4B MXFP8 + FP8 KV
This repository contains an MXFP8-weight checkpoint derived from
google/gemma-4-26B-A4B,
exported in compressed-tensors format. The checkpoint retains the source
multimodal components, but the evaluation reported here covers text tasks only.
Model details
| Property | Value |
|---|---|
| Architecture | Gemma4ForConditionalGeneration |
| Weight format | MXFP8 (F8_E4M3) with BF16-retained modules |
| KV-cache format | FP8 |
| Export format | compressed-tensors |
| Maximum context configured in evaluation | 131,072 tokens |
| Sharded checkpoint size | 28,415,419,904 bytes across six safetensors shards |
The exported checkpoint contains 11,635 F8_E4M3 weight tensors, 838 BF16
weight tensors, 11,635 U8 block-scale tensors, and 171 FP32 scale/metadata
tensors. Routed-expert weights and source-present text self-attention
projections are MXFP8; the router, shared MLP, vision tower, and embeddings
remain BF16.
Evaluation
Measured on 2026-09-30 with lm-eval 0.4.13 and vLLM 0.29.0. The tested settings
were TRITON_ATTN, tensor parallelism 2, pipeline parallelism 1, batch size
64, max_num_seqs=64, FP8 KV cache, and max_model_len=131072.
| Benchmark | Metric | Score | Samples |
|---|---|---|---|
| PIQA | accuracy | 82.75% | 1,838 |
| MMLU | accuracy | 74.41% | 14,042 |
| HellaSwag | accuracy | 63.40% | 10,042 |
| GSM8K | strict exact match | 73.69% | 1,319 |
| Arithmetic mean of the four task scores | — | 73.57% | — |
These are measured results for the listed tasks and settings, not a general quality guarantee. Setting a 131,072-token model limit does not make these benchmarks a long-context stress test.
Runtime notes and limitations
- The evaluation logs confirm that vLLM used FP8 KV-cache storage with
TRITON_ATTN. The results do not establish performance or quality on other hardware, parallel layouts, or backends. - The checkpoint includes static FP8 attention metadata. Its consumption by vLLM 0.29.0 was not verified; this evaluation should not be interpreted as proof that FP8 attention ran.
- vLLM warns that FP8 KV caching can affect accuracy if the scaling factors are unsuitable. The benchmark results are specific to the tested configuration.
- Vision, multimodal prompts, thinking-on behavior, and long-context retrieval were not evaluated.
License and attribution
This model is derived from Google's Gemma 4 26B-A4B. The upstream model card lists Apache 2.0; review the Gemma 4 license and comply with its terms when using or redistributing this checkpoint.
Configuration
- Architecture
- Gemma4ForConditionalGeneration
- Context length (tokens)
- 262,144
- Layers
- 30
- Hidden size
- 2,816
- Feed-forward size
- 2,112
- Attention heads
- 16
- Key/value heads
- 8
- Head dimension
- 256
- Vocabulary size
- 262,144
- Experts
- 128
- Sliding window (tokens)
- 1,024
- Model type
- gemma4
- Quantization
- compressed-tensors
Identity and Version
- Repository
- INCModel4/gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound
- Publisher
- INC Optimized Models 4
- Task
- Text generation
- Modality
- Text
- Library
- transformers
- Parameters
- 25.8B parameters
- Languages
- mx-fp8
- Revision
- 3b54f3a2c7c35debcede5b1e5e3083576fe0ec80
- First published
- 2026-09-30
- Last updated
- 2026-09-30
Files and Weights
15 files, 28.5 GB in total. The weights are 6 files totalling 28.4 GB in safetensors.
Every file
| File | Type | Size | SHA-256 |
|---|---|---|---|
| model-00001-of-00006.safetensors | Weights | 5.4 GB | bf37c7dd603e |
| model-00002-of-00006.safetensors | Weights | 5.4 GB | 6a4090f18d9d |
| model-00003-of-00006.safetensors | Weights | 5.4 GB | c385a02c9a92 |
| model-00004-of-00006.safetensors | Weights | 5.4 GB | 134c2b9fb525 |
| model-00005-of-00006.safetensors | Weights | 5.4 GB | fb1d5dac3c8c |
| model-00006-of-00006.safetensors | Weights | 1.6 GB | cfd5a5c3ee76 |
| config.json | Configuration | 25.7 KB | — |
| generation_config.json | Configuration | 177 B | — |
| model.safetensors.index.json | Configuration | 2.5 MB | — |
| processor_config.json | Configuration | 1.7 KB | — |
| quantization_config.json | Configuration | 20.7 KB | — |
| README.md | Documentation | 2.9 KB | — |
| .gitattributes | Repository | 1.6 KB | — |
| tokenizer.json | Tokenizer | 32.2 MB | 12bac982b793 |
| tokenizer_config.json | Tokenizer | 1.5 KB | — |
License and Download
- License
- apache-2.0
- Access
- Open weights, no gate
- Download size
- 28.4 GB
Released by INC Optimized Models 4 through its official repository on Hugging Face. Read the license.
Built From
- Derived from google/gemma-4-26B-A4B
- Quantized from google/gemma-4-26B-A4B
Memory Requirements
| Precision | Weights in memory |
|---|---|
| As published | 28.4 GB |
| 16-bit | 51.6 GB |
| 8-bit | 25.8 GB |
| 4-bit | 12.9 GB |
Weights only, from the published parameter count; the key-value cache and runtime add to this.
Questions About gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound
How much GPU memory does gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound need?
About 61.9 GB at 16-bit and 15.5 GB at 4-bit: the weights (25.8B parameters) plus a working margin. A long context needs more.
What is the cheapest GPU to run gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound on?
At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.
Can I use gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound commercially?
Yes. gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.
What is gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound's context length?
262,144 tokens, from the maximum position embeddings in its published configuration.
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