Gemma 4 26B A4B is the Mixture-of-Experts variant in Google's Gemma 4 family, with 25.2B total parameters but only 3.8B active per token. Built from the same Gemini 3 research as the 31B dense sibling and released as open weights under the Apache 2.0 license, it supports a 256K token context window with text and image input and configurable thinking mode. The "A4B" in the name refers to its approximately 4B active parameters. The MoE design makes it significantly faster at inference than the dense 31B, running nearly as fast as a 4B-parameter model while delivering roughly 97% of the dense model's quality.
For vision tasks, the 26B A4B shares the same multimodal capabilities as the 31B image understanding with variable aspect ratios and resolutions, and structured bounding box output for UI element detection. The tradeoff versus the 31B dense model is a small quality reduction in exchange for much faster inference and lower hardware requirements, fitting in 18GB of VRAM at 4-bit quantization. It ranked #6 among open models on the Arena AI text leaderboard at launch.
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Usage
Past 30 DaysGemma 4 26B A4B has not yet been evaluated on the current benchmark. The results below are from the legacy version of Vision Evals, our previous benchmark. See the current Vision Evals
| Category | Passed | Score |
|---|---|---|
| Document Understanding | 8 / 9 | 88.9% |
| Object Understanding | 12 / 14 | 85.7% |
| Defect Detection | 12 / 15 | 80% |
| Spatial Understanding | 13 / 19 | 68.4% |
| Object Counting | 1 / 10 | 10% |
| Category | Passed | Score |
|---|---|---|
| License Plate Recognition | 28 / 30 | 93.3% |
| Focused Scene OCR | 85 / 99 | 85.9% |
| VQA & Extraction | 50 / 60 | 83.3% |
| Text Recognition | 24 / 30 | 80% |
| Handwritten Math | 5 / 10 | 50% |
Scores based on a single evaluation run · Methodology
View all legacy Vision Evals results →Gemma 4 26B A4B costs $0.070 per 1M input tokens and $0.340 per 1M output tokens.
Pricing updated Jul 21, 2026
Estimated cost per task vs. Visual Understanding score, for this model and others ranked near it. Upper-left is the sweet spot (high quality, low cost). Based on Vision Evals (legacy) results.
11 of 11 models plotted
| Model | Score | Median tokens | Est. cost / task | Compare |
|---|---|---|---|---|
| Claude Sonnet 5 | 70.2% | 2.2K | $0.0048 | Compare |
| Claude Sonnet 4.6 | 70.2% | 2.3K | $0.0080 | Compare |
| GPT-5.6 Luna | 70.2% | 1.5K | $0.0017 | Compare |
| Gemini 2.5 Pro | 70.2% | 856 | $0.0060 | Compare |
| Gemini 3.1 Flash-Lite | 68.7% | 1.1K | $0.0003 | Compare |
| Gemma 4 26B A4B(this model) | 68.7% | 531 | $0.0001 | — |
| Qwen3.6 Plus | 68.7% | 1.6K | $0.0005 | Compare |
| Claude Opus 4.8 | 67.2% | 2.2K | $0.012 | Compare |
| Claude Opus 4.7 | 67.2% | 2.6K | $0.015 | Compare |
| Gemma 4 31B | 67.2% | 467 | $0.0001 | Compare |
| Claude Opus 4.6 | 64.2% | 2.3K | $0.014 | Compare |
Other models worth comparing for similar use cases.
License terms and commercial-use guidance for Gemma 4 26B A4B.
This model is released under the Apache License 2.0, a permissive open-source license that allows commercial use, modification, distribution, and patent use.
Yes. Under the terms of the Apache 2.0 license, you can freely use this model for commercial purposes, including in proprietary products. You must retain the copyright notice and disclaimers when redistributing.
License information is provided as a guide and is not legal advice.
Yes. Gemma 4 26B A4B accepts image input, and on Roboflow's previous vision benchmark it passed 68.7% of visual understanding tasks (#25 of 77) and scored 83.8% on OCR. You can test it on your own image in the demo above.
Gemma 4 26B A4B has not yet been evaluated on Roboflow's current Vision Evals. The results on this page are from the previous benchmark.
Yes. The demo on this page runs Gemma 4 26B A4B in the free Roboflow Playground: upload an image and see results in seconds. A free account unlocks unlimited runs.