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 Days| 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 Vision Evals →Gemma 4 26B A4B costs $0.060 per 1M input tokens and $0.330 per 1M output tokens.
Pricing updated Jul 9, 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).
11 of 11 models plotted
| Model | Score | Median tokens | Est. cost / task | Compare |
|---|---|---|---|---|
| Qwen3.5 27B | 71.6% | 1.2K | $0.0002 | Compare |
| Claude Sonnet 5 | 70.2% | 2.2K | $0.0048 | Compare |
| Claude Sonnet 4.6 | 70.2% | 2.3K | $0.0080 | 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.
License information is provided as a guide and is not legal advice.