Gemini 2.5 Flash Lite vs Nano Banana 2 (Gemini 3.1 Flash Image)
Gemini 2.5 Flash Lite (2025) and Nano Banana 2 (Gemini 3.1 Flash Image) (2026) are frontier reasoning models from Google DeepMind. Gemini 2.5 Flash Lite ships a 1m-token context window, while Nano Banana 2 (Gemini 3.1 Flash Image) ships a 131k-token context window. On pricing, Gemini 2.5 Flash Lite costs $0.10/1M input tokens versus $0.50/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemini 2.5 Flash Lite is ~400% cheaper at $0.10/1M; pay for Nano Banana 2 (Gemini 3.1 Flash Image) only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Flash Lite | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Best for | multimodal apps, tool-calling agents, 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 | $0.40/1M tokens | $60/1M tokens |
| Provider routes | 4 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini 2.5 Flash Lite has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Flash Lite has the lower cheapest tracked output price at $0.40/1M tokens.
- Gemini 2.5 Flash Lite has broader tracked provider coverage for fallback and procurement flexibility.
- Gemini 2.5 Flash Lite uniquely exposes Function calling, Tool use, and Structured outputs in local model data.
- Local decision data tags Gemini 2.5 Flash Lite 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 Flash Lite
$180
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: $15,220. 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 $59.60/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Function calling, Tool use, and Structured outputs before moving production traffic.
- Nano Banana 2 (Gemini 3.1 Flash Image) adds Reasoning in local capability data.
- Provider overlap exists on Google AI Studio; start route-level A/B tests there.
- Gemini 2.5 Flash Lite is $59.60/1M 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 Flash Lite adds Function calling, Tool use, and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-07-22 | 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 | 2025-01 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Flash Lite | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Input price | $0.10/1M tokens | $0.50/1M tokens |
| Output price | $0.40/1M tokens | $60/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Flash Lite | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | Yes |
| Function calling | Yes | No |
| Tool use | Yes | 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), function calling: Gemini 2.5 Flash Lite, tool use: Gemini 2.5 Flash Lite, structured outputs: Gemini 2.5 Flash Lite, and code execution: Gemini 2.5 Flash Lite. 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 Flash Lite lists $0.10/1M input and $0.40/1M 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 Flash Lite lower by about $18.16 per million blended tokens. Availability is 4 providers versus 1, so concentration risk also matters.
Choose Gemini 2.5 Flash Lite when coding workflow support, larger context windows, and lower input-token cost are central to the workload. Choose Nano Banana 2 (Gemini 3.1 Flash Image) when reasoning depth 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 Flash Lite or Nano Banana 2 (Gemini 3.1 Flash Image)?
Gemini 2.5 Flash Lite 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 Flash Lite or Nano Banana 2 (Gemini 3.1 Flash Image)?
Gemini 2.5 Flash Lite is cheaper on tracked token pricing. Gemini 2.5 Flash Lite costs $0.10/1M input and $0.40/1M 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 Flash Lite or Nano Banana 2 (Gemini 3.1 Flash Image) open source?
Gemini 2.5 Flash Lite 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 Flash Lite or Nano Banana 2 (Gemini 3.1 Flash Image)?
Both Gemini 2.5 Flash Lite 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 Flash Lite or Nano Banana 2 (Gemini 3.1 Flash Image)?
Both Gemini 2.5 Flash Lite 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 Flash Lite and Nano Banana 2 (Gemini 3.1 Flash Image)?
Gemini 2.5 Flash Lite is available on Google AI Studio, GCP Vertex AI, OpenRouter, and Vercel AI Gateway. 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: 2026-06-15. Data sourced from public model cards and provider documentation.