Nano Banana Pro (Gemini 3 Pro Image) vs Phi-4 Reasoning Vision 15B
Nano Banana Pro (Gemini 3 Pro Image) (2026) and Phi-4 Reasoning Vision 15B (2026) are frontier reasoning models from Google DeepMind and Microsoft Research. Nano Banana Pro (Gemini 3 Pro Image) ships a 66k-token context window, while Phi-4 Reasoning Vision 15B ships a not-yet-sourced context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Nano Banana Pro (Gemini 3 Pro Image) is safer overall; choose Phi-4 Reasoning Vision 15B when provider fit matters.
Decision scorecard
Local evidence first| Signal | Nano Banana Pro (Gemini 3 Pro Image) | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | multimodal apps |
| Decision fit | Agents, Vision, and JSON / Tool use | Vision |
| Context window | 66k | — |
| Cheapest output | $120/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Nano Banana Pro (Gemini 3 Pro Image) has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Nano Banana Pro (Gemini 3 Pro Image) has broader tracked provider coverage for fallback and procurement flexibility.
- Nano Banana Pro (Gemini 3 Pro Image) uniquely exposes Vision, Reasoning, and Tool use in local model data.
- Local decision data tags Nano Banana Pro (Gemini 3 Pro Image) for Agents, Vision, and JSON / Tool use.
- Local decision data tags Phi-4 Reasoning Vision 15B for Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Nano Banana Pro (Gemini 3 Pro Image)
$31,600
Cheapest tracked route/tier: Google AI Studio
Phi-4 Reasoning Vision 15B
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 Nano Banana Pro (Gemini 3 Pro Image) and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Reasoning, and Tool use before moving production traffic.
- No overlapping tracked provider route is sourced for Phi-4 Reasoning Vision 15B and Nano Banana Pro (Gemini 3 Pro Image); plan for SDK, billing, or endpoint changes.
- Nano Banana Pro (Gemini 3 Pro Image) adds Vision, Reasoning, and Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-05-28 | 2026-03-12 |
| Context window | 66k | — |
| Parameters | — | 15B |
| Architecture | decoder only | - |
| License | Proprietary | Microsoft Research |
| Knowledge cutoff | 2025-01 | 2025-03 |
Pricing and availability
| Pricing attribute | Nano Banana Pro (Gemini 3 Pro Image) | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | $2/1M tokens | - |
| Output price | $120/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Nano Banana Pro (Gemini 3 Pro Image) | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| Function calling | No | No |
| Tool use | Yes | No |
| 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: Nano Banana Pro (Gemini 3 Pro Image), reasoning mode: Nano Banana Pro (Gemini 3 Pro Image), tool use: Nano Banana Pro (Gemini 3 Pro Image), and structured outputs: Nano Banana Pro (Gemini 3 Pro Image). Both models share multimodal input, 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: Nano Banana Pro (Gemini 3 Pro Image) has $2/1M input tokens and Phi-4 Reasoning Vision 15B has no token price sourced yet. Provider availability is 1 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Nano Banana Pro (Gemini 3 Pro Image) when reasoning depth and broader provider choice are central to the workload. Choose Phi-4 Reasoning Vision 15B when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Is Nano Banana Pro (Gemini 3 Pro Image) or Phi-4 Reasoning Vision 15B open source?
Nano Banana Pro (Gemini 3 Pro Image) is listed under Proprietary. Phi-4 Reasoning Vision 15B is listed under Microsoft Research. 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, Nano Banana Pro (Gemini 3 Pro Image) or Phi-4 Reasoning Vision 15B?
Nano Banana Pro (Gemini 3 Pro Image) 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, Nano Banana Pro (Gemini 3 Pro Image) or Phi-4 Reasoning Vision 15B?
Both Nano Banana Pro (Gemini 3 Pro Image) and Phi-4 Reasoning Vision 15B expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for reasoning mode, Nano Banana Pro (Gemini 3 Pro Image) or Phi-4 Reasoning Vision 15B?
Nano Banana Pro (Gemini 3 Pro Image) 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 tool use, Nano Banana Pro (Gemini 3 Pro Image) or Phi-4 Reasoning Vision 15B?
Nano Banana Pro (Gemini 3 Pro Image) has the clearer documented tool use signal in this comparison. If tool use 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) and Phi-4 Reasoning Vision 15B?
Nano Banana Pro (Gemini 3 Pro Image) is available on Google AI Studio. Phi-4 Reasoning Vision 15B is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-31. Data sourced from public model cards and provider documentation.