Nano Banana Pro (Gemini 3 Pro Image) vs Nano Banana 2 (Gemini 3.1 Flash Image)
Nano Banana Pro (Gemini 3 Pro Image) (2026) and Nano Banana 2 (Gemini 3.1 Flash Image) (2026) are frontier-tier reasoning models from Google DeepMind. Nano Banana Pro (Gemini 3 Pro Image) ships a 66k-token context window, while Nano Banana 2 (Gemini 3.1 Flash Image) ships a 131k-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.
Nano Banana 2 (Gemini 3.1 Flash Image) is ~300% cheaper at $0.50/1M; pay for Nano Banana Pro (Gemini 3 Pro Image) only for vision-heavy evaluation.
Decision scorecard
Local evidence first| Signal | Nano Banana Pro (Gemini 3 Pro Image) | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps and multimodal apps |
| Decision fit | Agents, Vision, and JSON / Tool use | Long context and Vision |
| Context window | 66k | 131k |
| Cheapest output | $120/1M tokens | $60/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Nano Banana Pro (Gemini 3 Pro Image) uniquely exposes Tool use and Structured outputs in local model data.
- Local decision data tags Nano Banana Pro (Gemini 3 Pro Image) for Agents, Vision, and JSON / Tool use.
- Nano Banana 2 (Gemini 3.1 Flash Image) has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Nano Banana 2 (Gemini 3.1 Flash Image) has the lower cheapest tracked output price at $60/1M tokens.
- Local decision data tags Nano Banana 2 (Gemini 3.1 Flash Image) for Long context and 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
Nano Banana 2 (Gemini 3.1 Flash Image)
$15,400
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $16,200. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Google AI Studio; start route-level A/B tests there.
- Nano Banana 2 (Gemini 3.1 Flash Image) is $60/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Tool use and Structured outputs before moving production traffic.
- Provider overlap exists on Google AI Studio; start route-level A/B tests there.
- Nano Banana Pro (Gemini 3 Pro Image) is $60/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Nano Banana Pro (Gemini 3 Pro Image) adds Tool use and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-05-28 | 2026-05-28 |
| Context window | 66k | 131k |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-01 | 2025-01 |
Pricing and availability
| Pricing attribute | Nano Banana Pro (Gemini 3 Pro Image) | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Input price | $2/1M tokens | $0.50/1M tokens |
| Output price | $120/1M tokens | $60/1M tokens |
| Providers |
Capabilities
| Capability | Nano Banana Pro (Gemini 3 Pro Image) | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| 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 tool use: Nano Banana Pro (Gemini 3 Pro Image) and structured outputs: Nano Banana Pro (Gemini 3 Pro Image). Both models share vision, multimodal input, and reasoning mode, 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) lists $2/1M input and $120/1M output tokens on the cheapest tracked provider, while Nano Banana 2 (Gemini 3.1 Flash Image) lists $0.50/1M input and $60/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Nano Banana 2 (Gemini 3.1 Flash Image) lower by about $19.05 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Nano Banana Pro (Gemini 3 Pro Image) when vision-heavy evaluation are central to the workload. Choose Nano Banana 2 (Gemini 3.1 Flash Image) 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.
FAQ
Which has a larger context window, Nano Banana Pro (Gemini 3 Pro Image) or Nano Banana 2 (Gemini 3.1 Flash Image)?
Nano Banana 2 (Gemini 3.1 Flash Image) supports 131k tokens, while Nano Banana Pro (Gemini 3 Pro Image) 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) or Nano Banana 2 (Gemini 3.1 Flash Image)?
Nano Banana 2 (Gemini 3.1 Flash Image) is cheaper on tracked token pricing. Nano Banana Pro (Gemini 3 Pro Image) costs $2/1M input and $120/1M output tokens. Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.50/1M input and $60/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Nano Banana Pro (Gemini 3 Pro Image) or Nano Banana 2 (Gemini 3.1 Flash Image) open source?
Nano Banana Pro (Gemini 3 Pro Image) is listed under Proprietary. Nano Banana 2 (Gemini 3.1 Flash Image) is listed under Proprietary. 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 Nano Banana 2 (Gemini 3.1 Flash Image)?
Both Nano Banana Pro (Gemini 3 Pro Image) and Nano Banana 2 (Gemini 3.1 Flash Image) expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for multimodal input, Nano Banana Pro (Gemini 3 Pro Image) or Nano Banana 2 (Gemini 3.1 Flash Image)?
Both Nano Banana Pro (Gemini 3 Pro Image) and Nano Banana 2 (Gemini 3.1 Flash Image) expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Nano Banana Pro (Gemini 3 Pro Image) and Nano Banana 2 (Gemini 3.1 Flash Image)?
Nano Banana Pro (Gemini 3 Pro Image) is available on Google AI Studio. Nano Banana 2 (Gemini 3.1 Flash Image) is available on Google AI Studio. 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.