Nano Banana Pro (Gemini 3 Pro Image Preview) vs Llama Guard 4 12B
Nano Banana Pro (Gemini 3 Pro Image Preview) (2025) and Llama Guard 4 12B (2025) are compact production models from Google DeepMind and AI at Meta. Nano Banana Pro (Gemini 3 Pro Image Preview) ships a 66K-token context window, while Llama Guard 4 12B ships a 164K-token context window. On pricing, Llama Guard 4 12B costs $0.18/1M input tokens versus $2/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Llama Guard 4 12B is ~1011% cheaper at $0.18/1M; pay for Nano Banana Pro (Gemini 3 Pro Image Preview) only for provider fit.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-09-01 | 2025-04-05 |
| Context window | 66K | 164K |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Unknown | Open Source |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Nano Banana Pro (Gemini 3 Pro Image Preview) | Llama Guard 4 12B |
|---|---|---|
| Input price | $2/1M tokens | $0.18/1M tokens |
| Output price | $120/1M tokens | $0.18/1M tokens |
| Providers |
Capabilities
| Capability | Nano Banana Pro (Gemini 3 Pro Image Preview) | Llama Guard 4 12B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | Yes |
| Code execution | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on structured outputs: Llama Guard 4 12B. 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.
For cost, Nano Banana Pro (Gemini 3 Pro Image Preview) lists $2/1M input and $120/1M output tokens, while Llama Guard 4 12B lists $0.18/1M input and $0.18/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Llama Guard 4 12B lower by about $37.22 per million blended tokens. Availability is 3 providers versus 3, so concentration risk also matters.
Choose Nano Banana Pro (Gemini 3 Pro Image Preview) when provider fit are central to the workload. Choose Llama Guard 4 12B when long-context analysis, larger context windows, and lower input-token cost 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
Which has a larger context window, Nano Banana Pro (Gemini 3 Pro Image Preview) or Llama Guard 4 12B?
Llama Guard 4 12B supports 164K tokens, while Nano Banana Pro (Gemini 3 Pro Image Preview) supports 66K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Nano Banana Pro (Gemini 3 Pro Image Preview) or Llama Guard 4 12B?
Llama Guard 4 12B is cheaper on tracked token pricing. Nano Banana Pro (Gemini 3 Pro Image Preview) costs $2/1M input and $120/1M output tokens. Llama Guard 4 12B costs $0.18/1M input and $0.18/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Nano Banana Pro (Gemini 3 Pro Image Preview) or Llama Guard 4 12B open source?
Nano Banana Pro (Gemini 3 Pro Image Preview) is listed under Unknown. Llama Guard 4 12B is listed under Open Source. 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 structured outputs, Nano Banana Pro (Gemini 3 Pro Image Preview) or Llama Guard 4 12B?
Llama Guard 4 12B has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Nano Banana Pro (Gemini 3 Pro Image Preview) and Llama Guard 4 12B?
Nano Banana Pro (Gemini 3 Pro Image Preview) is available on Google AI Studio, GCP Vertex AI, and OpenRouter. Llama Guard 4 12B is available on NVIDIA NIM, Replicate API, and OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Nano Banana Pro (Gemini 3 Pro Image Preview) over Llama Guard 4 12B?
Llama Guard 4 12B is ~1011% cheaper at $0.18/1M; pay for Nano Banana Pro (Gemini 3 Pro Image Preview) only for provider fit. If your workload also depends on provider fit, start with Nano Banana Pro (Gemini 3 Pro Image Preview); if it depends on long-context analysis, run the same evaluation with Llama Guard 4 12B.
Continue comparing
Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.