Google Gemma 4 Ships Four Open Models Under Apache 2.0 — 31B Hits Arena ELO 1452
Google DeepMind released Gemma 4 on April 2, 2026 — a family of four open-weight models spanning edge devices to datacenter GPUs, all licensed under Apache 2.0.
Model Lineup
| Variant | Params | Context | Hardware |
|---|---|---|---|
| E2B | 2B | 128K | Phone, Raspberry Pi, Jetson Nano |
| E4B | 4B | 128K | Phone, IoT |
| 26B A4B (MoE) | 26B total / 3.8B active | 256K | 16GB VRAM GPU |
| 31B Dense | 31B | 256K | 24GB VRAM (RTX 4090) |
All four variants support multimodal input (image + video). Audio is available on the two edge models.
Key Benchmark Numbers
| Benchmark | Gemma 4 31B | Gemma 3 27B | Delta |
|---|---|---|---|
| AIME 2026 Math | 89.2% | 20.8% | +68.4 pts |
| LiveCodeBench v6 | 80.0% | 38.0% | +42.0 pts |
| GPQA Diamond | 84.3% | 50.0% | +34.3 pts |
| MMLU Pro | 85.2% | 67.5% | +17.7 pts |
| Chatbot Arena ELO | ~1452 | ~1365 | +87 pts |
The 26B MoE activates only 3.8B parameters at inference, delivering near-31B quality at substantially lower compute cost. That design is the key architectural story: the MoE lands at Arena ELO ~1441, just 11 points below the dense 31B.
Where It Ranks
On Chatbot Arena as of April 2026, Gemma 4 31B sits third among all open models globally. It outperforms Llama 4 Maverick (ELO ~1417) and Qwen 3.5 27B on most benchmarks despite having fewer parameters than either.
Competitive programmers hit roughly ELO 2150 on Codeforces. Gemma 4 31B matches that threshold on the same benchmark.
Pricing
OpenRouter lists the 31B at $0.14/M input, $0.40/M output. At that price point it competes directly with Llama 4 Scout ($0.08/$0.30) while offering materially better reasoning.
Availability
Models are live on Hugging Face, Kaggle, Ollama, Google AI Studio, and AI Edge Gallery. The 26B and 31B run fully in AI Studio without local setup. The Apache 2.0 license allows commercial use and fine-tuning without royalties.
Gemma 4 shares its research base with Gemini 3 — same architecture lineage, different deployment target.