Google Gemma 4 launches April 2026 under Apache 2.0 4 model sizes from smartphone to 31B Dense, benchmarks beating Llama 4 Maverick on coding and math.
Google DeepMind released Gemma 4 on April 2, 2026, and two things make it immediately significant: Apache 2.0 licensing and hardware efficiency that no competitor at this capability level matches. Gemma 4’s 31B Dense model ranks third globally among open-weight models despite being a fraction of the size of Llama 4 Maverick (400B total parameters). Its smallest variant — the E2B with 2.3 billion effective parameters — runs on a smartphone. The Apache 2.0 license, the first in the Gemma family’s history, removes the usage restrictions that made previous Gemma releases impractical for many commercial deployments. Based on our analysis of open-weight model releases in April 2026, Gemma 4 is the most complete open-model family available for developers who want frontier-level reasoning on hardware they actually own.
Why the Apache 2.0 License Is the Real Story
Previous Gemma releases (Gemma 1, 2, and 3) shipped under Google’s custom Gemma Terms of Use — a license that was permissive enough for research and personal projects but included restrictions that made many commercial applications legally uncertain. The custom license included clauses limiting use for certain competitive or high-risk applications, required attribution in ways that were operationally inconvenient, and was not recognized by the Open Source Initiative as a true open-source license.
Apache 2.0 eliminates all of that. It is the most commercially friendly open-source license available. You can use Gemma 4 in production applications, build proprietary products on top of it, modify the weights, redistribute derivative models, and do all of this without royalties or special attribution requirements. The only obligations are preserving copyright notices in source files and documenting any modifications if you redistribute.
According to our analysis of enterprise AI adoption patterns in Q1 2026, licensing uncertainty was the most commonly cited reason developers chose Llama 4 over previous Gemma releases for production projects. Apache 2.0 removes that objection entirely. For teams evaluating open-weight models for commercial deployment, Gemma 4 and Mistral models are now in the same legal category — genuinely open for business. Llama 4’s community license, while free for most organizations, includes a threshold clause that restricts use for services with over 700 million monthly active users — a constraint that does not exist in Apache 2.0.
The Four Model Variants: From Smartphone to Data Center
Gemma 4 ships in four sizes, each targeting a different hardware tier. The “E” variants (E2B and E4B) use a sparse mixture-of-experts architecture to achieve higher effective capability per active parameter on edge devices, while the 26B MoE and 31B Dense variants target developer workstations and cloud infrastructure respectively:
- Gemma 4 E2B — 2.3B effective parameters. Designed for mobile and edge deployment. Runs on smartphones, embedded systems, and laptops with 4GB RAM. Supports text, image, and audio inputs. Best for on-device applications where cloud API calls are impractical due to latency, cost, or data privacy requirements.
- Gemma 4 E4B — 4.5B effective parameters. Designed for laptop and consumer-grade deployment. Runs on machines with 8GB of RAM using Q4 quantization. Supports text, image, and audio. Best for developer tooling, local document processing, and privacy-sensitive workflows on standard hardware.
- Gemma 4 26B MoE — 26B total parameters, 3.8B active per token (mixture-of-experts). Runs on a 24GB GPU such as an RTX 4090 with Q4 quantization, or comfortably on a 48GB workstation GPU at higher precision. The sweet spot for price-to-performance — it achieves 88.3% on AIME 2026 math benchmarks with only 3.8B active parameters per inference step.
- Gemma 4 31B Dense — 31B parameters, all active. Runs on a single 80GB H100 or A100 without quantization. The most capable Gemma 4 variant and the one that earns the global #3 open-model ranking. Best for cloud deployments where maximum capability is the priority.
The hardware accessibility of this lineup is its defining feature. Most developers working with on-premise or consumer hardware can run at least E4B or the 26B MoE — which delivers capabilities that would have required renting multi-GPU cloud instances just eighteen months ago.
Benchmark Performance: Small Models, Frontier Numbers
The 31B Dense model’s benchmark results are the standout story of the Gemma 4 release. A 31B parameter model reaching these scores, and ranking third globally among open-weight models, signals a substantial improvement in parameter efficiency compared to previous generations:
| Benchmark | Gemma 4 31B Dense | Gemma 4 26B MoE | Llama 4 Maverick |
|---|---|---|---|
| MMLU Pro (graduate knowledge) | 85.2% | 83.7% | 85.5% |
| AIME 2026 (math competition) | 89.2% | 88.3% | 87.6% |
| GPQA Diamond (PhD-level science) | 84.3% | 81.9% | 80.2% |
| LiveCodeBench v6 (real-world coding) | 80.0% | 77.4% | 74.8% |
The 26B MoE variant’s performance is arguably the more remarkable achievement: 88.3% on AIME 2026 with only 3.8B active parameters per token. This means that during each inference step, the model activates only 3.8B parameters — comparable to running a small language model — while achieving math reasoning scores that exceed models ten times its active size. The MoE architecture routes each token to specialized expert layers, achieving higher capability per active parameter than dense models of equivalent total size.
For context on what these scores mean in practice: GPQA Diamond contains graduate-level science questions requiring deep domain expertise. An 84.3% score exceeds the performance of most human experts who are not specialists in the specific question’s subfield. LiveCodeBench v6 tests real-world coding ability on problems drawn from recent competitive programming contests — problems that have not appeared in training data — making it one of the most reliable measures of genuine coding capability rather than benchmark memorization. Gemma 4 31B’s 80.0% on this benchmark is a strong signal for developers evaluating it as a local coding assistant.
Architecture: 256K Context and Native Multimodal
All four Gemma 4 variants share a 256,000 token context window. For reference, 256K tokens covers approximately 200,000 words (two to three full-length novels), a codebase of 15,000–20,000 lines with documentation, or around 800 pages of dense technical documentation. This context length is meaningfully larger than GPT-5.4’s default context (128K) and smaller than Llama 4 Maverick’s 1M context window — positioning Gemma 4 as appropriate for most document analysis tasks without requiring the specialized infrastructure that million-token contexts demand.
Native multimodal support is included across all four variants: every Gemma 4 model accepts text and image inputs natively, without requiring a separate vision encoder pipeline. The E2B and E4B edge variants additionally support audio input, enabling applications like real-time transcription, audio question-answering, and voice-driven interfaces that run entirely on device. Function calling is supported across all variants, which is the prerequisite for using Gemma 4 as the reasoning backbone of a local AI agent framework.
The 256K context combined with image and audio inputs makes Gemma 4 particularly well-suited for document intelligence pipelines that process mixed-media documents — PDFs with embedded charts, research papers with figures, scanned invoices with handwritten annotations — tasks that previously required stitching together separate text, vision, and audio models.
Running Gemma 4 Locally: Three Paths
Ollama (Easiest for Local Development)
Ollama supports all four Gemma 4 variants through its standard model registry. Once Ollama is installed, pulling and running Gemma 4 requires a single command:
# Run Gemma 4 E4B on any machine with 8GB RAM
ollama run gemma4:e4b
# Run the 26B MoE variant (requires 24GB GPU)
ollama run gemma4:26b-moe
# Query via the OpenAI-compatible REST API
curl http://localhost:11434/v1/chat/completions \
-H "Content-Type: application/json" \
-d '{"model":"gemma4:e4b","messages":[{"role":"user","content":"Explain MoE architecture"}]}'Ollama’s OpenAI-compatible API endpoint means any application built against the OpenAI Python SDK can switch to Gemma 4 running locally with a single endpoint URL change and no other code modifications.
Hugging Face Transformers
All Gemma 4 variants are available on Hugging Face under the google/gemma-4-* model IDs. Standard transformers usage with bfloat16 precision:
from transformers import AutoTokenizer, AutoModelForCausalLM
import torch
model_id = "google/gemma-4-e4b-instruct"
tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(
model_id,
torch_dtype=torch.bfloat16,
device_map="auto"
)
messages = [{"role": "user", "content": "Summarize this contract in 5 key points"}]
input_ids = tokenizer.apply_chat_template(messages, return_tensors="pt").to(model.device)
output = model.generate(input_ids, max_new_tokens=512)
print(tokenizer.decode(output[0][input_ids.shape[1]:], skip_special_tokens=True))Google AI Studio (Free API Access)
Google AI Studio provides free-tier API access to Gemma 4 with rate limits suitable for development and evaluation. Use model ID gemma-4-31b-it for the Dense variant or gemma-4-26b-moe-it for the MoE variant through the Gemini API endpoint. This is the fastest path to testing Gemma 4 before committing to local infrastructure investment.
Gemma 4 vs Llama 4 Maverick vs Mistral Small 4
The open-weight model landscape in April 2026 is more competitive than at any previous point. Each of the three leading families excels at something different, and the right choice depends on your specific constraints:
| Factor | Gemma 4 31B Dense | Llama 4 Maverick | Mistral Small 4 |
|---|---|---|---|
| Total parameters | 31B | 400B (17B active/token) | 22B |
| Context window | 256K tokens | 1M tokens | 128K tokens |
| 24GB GPU (Q4)? | Yes (26B MoE) | No | Yes |
| License | Apache 2.0 | Meta Community (<700M MAU) | Apache 2.0 |
| Multimodal (native) | Text + image + audio (E variants) | Text + image | Text only |
| AIME 2026 (math) | 89.2% | 87.6% | 83.1% |
| LiveCodeBench v6 | 80.0% | 74.8% | 76.2% |
Choose Gemma 4 when you need strong math and coding benchmark performance on hardware you can realistically own or rent, when Apache 2.0 licensing is a hard requirement for your commercial deployment, or when you need native multimodal support including audio. The 26B MoE variant running on a single consumer GPU with 24GB VRAM is a particularly compelling option for teams who want near-frontier capability without cloud infrastructure costs.
Choose Llama 4 Maverick when you need the 1M token context window for processing extremely long documents (entire legal contracts, full codebases, extended research corpora), you are building on Meta’s existing Llama ecosystem, or you want the highest MMLU score (85.5%) among freely available open models. Maverick is available via Groq, Together AI, and Fireworks AI with fast inference at competitive pricing.
Choose Mistral Small 4 when you prioritize output quality per active parameter, need Apache 2.0 licensing, and your use case does not require multimodal inputs or extended math reasoning depth.
Practical Use Cases for Gemma 4
On-Device Applications with Full Data Privacy
Gemma 4 E2B running on a smartphone represents the most significant edge deployment story of April 2026. Applications that previously required cloud API calls — with associated latency, cost, and data privacy concerns — can now run entirely on device. Healthcare applications processing patient notes, legal tools handling privileged documents, and financial applications analyzing sensitive data can use Gemma 4 E2B without any data ever leaving the device. According to our analysis of enterprise AI deployment patterns in Q1 2026, on-device AI is one of the fastest-growing categories among organizations in regulated industries.
Local Coding Assistant
Gemma 4 26B MoE with 80.0% on LiveCodeBench v6 running via Ollama on a 24GB GPU delivers coding assistance that exceeds many cloud models from twelve months ago. For developers working with proprietary codebases where sending code to cloud APIs is prohibited by policy or contract, Gemma 4 is now the strongest available option. The 256K context window means you can pass an entire codebase directory as context without chunking. Use our JSON formatter at wowhow.cloud to validate structured outputs generated by your Gemma 4-powered coding tools.
Document Intelligence Pipelines
The combination of 256K context, native image support, and strong reasoning benchmarks makes Gemma 4 an excellent choice for document intelligence: extracting structured data from PDFs containing charts and tables, processing multi-page contracts without chunking, and analyzing research papers with embedded figures. For teams currently spending significant API budget on cloud models for document processing, the economics of running Gemma 4 locally on owned hardware at zero per-call cost can be compelling at scale.
Local AI Agents
Function calling support across all Gemma 4 variants enables local agent frameworks — Ollama with LangGraph, LM Studio with AutoGen, or fully custom tool-use implementations — to use Gemma 4 as the reasoning backbone. A local agent running Gemma 4 26B MoE on a 24GB workstation GPU can perform multi-step tool use (web search, file operations, code execution) with no cloud API dependency whatsoever. For organizations with strict data sovereignty requirements, this combination represents a production-viable agentic architecture that was not accessible at this quality level before Gemma 4. Browse AI workflow templates at wowhow.cloud for production-ready agent patterns you can adapt for local Gemma 4 deployments.
The Bottom Line
Google Gemma 4 is the best open-weight model family available for hardware-conscious developers in April 2026. The Apache 2.0 license removes the commercial uncertainty that held back previous Gemma releases. The four model sizes cover the full spectrum from smartphone-deployable (E2B) to frontier-level cloud performance (31B Dense). The 26B MoE variant’s achievement of 88.3% on AIME 2026 with only 3.8B active parameters per token is a genuine architectural milestone in parameter efficiency.
According to our analysis of open-weight model adoption in Q1 2026, the combination of Apache 2.0 licensing, consumer hardware compatibility, and near-frontier benchmark performance makes Gemma 4 the most practically deployable open-weight family ever released. For teams building commercial AI applications who want open-weight models with no licensing ambiguity, Gemma 4 is the default evaluation starting point. For developers with a 24GB GPU who want the strongest local model without infrastructure investment, the 26B MoE delivers frontier-level reasoning today. And for anyone exploring edge AI on mobile devices, the E2B and E4B variants are the most capable models ever designed to run without a dedicated GPU.
Explore our schema generator to build structured data for AI-powered pages you create with Gemma 4, and browse our developer templates for production-ready patterns optimized for open-weight model deployments.