Gemma 3 vs Gemma 4 12B
Gemma 3 (2025) and Gemma 4 12B (2026) are frontier reasoning models from Google DeepMind. Gemma 3 ships a not-yet-sourced context window, while Gemma 4 12B ships a 256k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing.
Gemma 4 12B is safer overall; choose Gemma 3 when provider fit matters.
Decision scorecard
Local evidence first| Signal | Gemma 3 | Gemma 4 12B |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Classification and JSON / Tool use | RAG, Agents, and Long context |
| Context window | — | 256k |
| Cheapest output | $0.08/1M tokens | - |
| Provider routes | 3 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Gemma 3 has broader tracked provider coverage for fallback and procurement flexibility.
- Gemma 3 uniquely exposes Structured outputs in local model data.
- Local decision data tags Gemma 3 for Classification and JSON / Tool use.
- Gemma 4 12B has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemma 4 12B uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Gemma 4 12B for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemma 3
$52.00
Cheapest tracked route/tier: OpenRouter
Gemma 4 12B
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Gemma 3 and Gemma 4 12B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- Gemma 4 12B adds Vision, Multimodal, and Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Gemma 4 12B and Gemma 3; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
- Gemma 3 adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-03-12 | 2026-06-03 |
| Context window | — | 256k |
| Parameters | — | 11.9B |
| Architecture | decoder only | encoder free unified multimodal |
| License | Open Source | Apache 2.0 |
| Knowledge cutoff | 2025-01 | 2025-01 |
Pricing and availability
| Pricing attribute | Gemma 3 | Gemma 4 12B |
|---|---|---|
| Input price | $0.04/1M tokens | - |
| Output price | $0.08/1M tokens | - |
| Providers |
Capabilities
| Capability | Gemma 3 | Gemma 4 12B |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| Function calling | No | Yes |
| Tool use | No | Yes |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Gemma 4 12B, multimodal input: Gemma 4 12B, reasoning mode: Gemma 4 12B, function calling: Gemma 4 12B, tool use: Gemma 4 12B, and structured outputs: Gemma 3. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Gemma 3 has $0.04/1M input tokens and Gemma 4 12B has no token price sourced yet. Provider availability is 3 tracked routes versus 2. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Gemma 3 when provider fit and broader provider choice are central to the workload. Choose Gemma 4 12B when reasoning depth are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Is Gemma 3 or Gemma 4 12B open source?
Gemma 3 is listed under Open Source. Gemma 4 12B is listed under Apache 2.0. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Gemma 3 or Gemma 4 12B?
Gemma 4 12B has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Gemma 3 or Gemma 4 12B?
Gemma 4 12B has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for reasoning mode, Gemma 3 or Gemma 4 12B?
Gemma 4 12B has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, Gemma 3 or Gemma 4 12B?
Gemma 4 12B has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Gemma 3 and Gemma 4 12B?
Gemma 3 is available on OpenRouter, Google AI Studio, and GCP Vertex AI. Gemma 4 12B is available on Hugging Face Inference Endpoints and Kaggle Models. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-03. Data sourced from public model cards and provider documentation.