Gemini 2.5 Pro Preview 06-05 vs Nano Banana 2 (Gemini 3.1 Flash Image)
Gemini 2.5 Pro Preview 06-05 (2025) and Nano Banana 2 (Gemini 3.1 Flash Image) (2026) are frontier reasoning models from Google DeepMind. Gemini 2.5 Pro Preview 06-05 ships a 1m-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 ~150% cheaper at $0.50/1M; pay for Gemini 2.5 Pro Preview 06-05 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 06-05 | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Best for | multimodal apps and long-context analysis | reasoning-heavy apps and multimodal apps |
| Decision fit | Coding, RAG, and Agents | Long context and Vision |
| Context window | 1m | 131k |
| Cheapest output | $10/1M tokens | $60/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini 2.5 Pro Preview 06-05 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Pro Preview 06-05 has the lower cheapest tracked output price at $10/1M tokens.
- Gemini 2.5 Pro Preview 06-05 uniquely exposes Structured outputs and Code execution in local model data.
- Local decision data tags Gemini 2.5 Pro Preview 06-05 for Coding, RAG, and Agents.
- Nano Banana 2 (Gemini 3.1 Flash Image) uniquely exposes Reasoning in local model data.
- 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.
Gemini 2.5 Pro Preview 06-05
$3,500
Cheapest tracked route/tier: OpenRouter
Nano Banana 2 (Gemini 3.1 Flash Image)
$15,400
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $11,900. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 2.5 Pro Preview 06-05 and Nano Banana 2 (Gemini 3.1 Flash Image); plan for SDK, billing, or endpoint changes.
- Nano Banana 2 (Gemini 3.1 Flash Image) is $50/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Structured outputs and Code execution before moving production traffic.
- Nano Banana 2 (Gemini 3.1 Flash Image) adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Nano Banana 2 (Gemini 3.1 Flash Image) and Gemini 2.5 Pro Preview 06-05; plan for SDK, billing, or endpoint changes.
- Gemini 2.5 Pro Preview 06-05 is $50/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning before moving production traffic.
- Gemini 2.5 Pro Preview 06-05 adds Structured outputs and Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-03-25 | 2026-05-28 |
| Context window | 1m | 131k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | 2025-01 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 06-05 | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Input price | $1.25/1M tokens | $0.50/1M tokens |
| Output price | $10/1M tokens | $60/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Pro Preview 06-05 | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | Yes |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | No |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Deep dive
The capability footprint differs most on reasoning mode: Nano Banana 2 (Gemini 3.1 Flash Image), structured outputs: Gemini 2.5 Pro Preview 06-05, and code execution: Gemini 2.5 Pro Preview 06-05. Both models share vision and 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.
For cost, Gemini 2.5 Pro Preview 06-05 lists $1.25/1M input and $10/1M 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 Gemini 2.5 Pro Preview 06-05 lower by about $14.48 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Gemini 2.5 Pro Preview 06-05 when coding workflow support and larger context windows are central to the workload. Choose Nano Banana 2 (Gemini 3.1 Flash Image) when reasoning depth 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, Gemini 2.5 Pro Preview 06-05 or Nano Banana 2 (Gemini 3.1 Flash Image)?
Gemini 2.5 Pro Preview 06-05 supports 1m tokens, while Nano Banana 2 (Gemini 3.1 Flash Image) supports 131k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Gemini 2.5 Pro Preview 06-05 or Nano Banana 2 (Gemini 3.1 Flash Image)?
Gemini 2.5 Pro Preview 06-05 is cheaper on tracked token pricing. Gemini 2.5 Pro Preview 06-05 costs $1.25/1M input and $10/1M 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 Gemini 2.5 Pro Preview 06-05 or Nano Banana 2 (Gemini 3.1 Flash Image) open source?
Gemini 2.5 Pro Preview 06-05 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, Gemini 2.5 Pro Preview 06-05 or Nano Banana 2 (Gemini 3.1 Flash Image)?
Both Gemini 2.5 Pro Preview 06-05 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, Gemini 2.5 Pro Preview 06-05 or Nano Banana 2 (Gemini 3.1 Flash Image)?
Both Gemini 2.5 Pro Preview 06-05 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 Gemini 2.5 Pro Preview 06-05 and Nano Banana 2 (Gemini 3.1 Flash Image)?
Gemini 2.5 Pro Preview 06-05 is available on OpenRouter. 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.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.