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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.

Parameters25.8B
Context262,144
Weights28.4 GB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads—

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.

PrecisionWeightsMemory neededCheapest setupPer hourAlso 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.

gemma-4-26B-A4B-MXFP8-FP8KV-FP8Attn-CT-RTN-AutoRound on every accelerator the SAVRN Index prices, at every precision

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.

Weights6 files · 28.4 GB
Configuration5 files · 2.6 MB
Tokenizer2 files · 32.2 MB
Documentation1 file · 2.9 KB
Repository1 file · 1.6 KB
Every file
FileTypeSizeSHA-256
model-00001-of-00006.safetensorsWeights5.4 GB bf37c7dd603e
model-00002-of-00006.safetensorsWeights5.4 GB 6a4090f18d9d
model-00003-of-00006.safetensorsWeights5.4 GB c385a02c9a92
model-00004-of-00006.safetensorsWeights5.4 GB 134c2b9fb525
model-00005-of-00006.safetensorsWeights5.4 GB fb1d5dac3c8c
model-00006-of-00006.safetensorsWeights1.6 GB cfd5a5c3ee76
config.jsonConfiguration25.7 KB —
generation_config.jsonConfiguration177 B —
model.safetensors.index.jsonConfiguration2.5 MB —
processor_config.jsonConfiguration1.7 KB —
quantization_config.jsonConfiguration20.7 KB —
README.mdDocumentation2.9 KB —
.gitattributesRepository1.6 KB —
tokenizer.jsonTokenizer32.2 MB 12bac982b793
tokenizer_config.jsonTokenizer1.5 KB —

License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
28.4 GB
Download from INC Optimized Models 4

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

PrecisionWeights in memory
As published28.4 GB
16-bit51.6 GB
8-bit25.8 GB
4-bit12.9 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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