GPT-5.1 vs Nano Banana 2
Compare pricing, context windows, and strengths for GPT-5.1 by OpenAI and Nano Banana 2 by Google - and see how to put either to work in Appaca.
GPT-5.1
Flagship model for coding, reasoning, and agentic tasks with adjustable reasoning depth and multimodal input/output.
View GPT-5.1Nano Banana 2
High-efficiency native image model optimized for fast generation, editing, and conversational image workflows at high throughput.
View Nano Banana 2GPT-5.1 vs Nano Banana 2 at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | GPT-5.1 | Nano Banana 2 |
|---|---|---|
| Provider | OpenAI | |
| Model type | Text | Image |
| Context window | 400K tokens | - |
| Input price | $1.25 / 1M tokens | - |
| Output price | $10 / 1M tokens | - |
| Status | Current | Current |
How GPT-5.1 and Nano Banana 2 differ
What the numbers mean in practice when choosing between GPT-5.1 and Nano Banana 2.
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These are different kinds of model: GPT-5.1 is a text model while Nano Banana 2 is an image model, so they often complement each other in a workflow rather than compete.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
GPT-5.1
1. Configurable Reasoning for Agentic Tasks
- Built to excel in autonomous or semi-autonomous coding workflows, with adjustable reasoning effort for planning, refactoring and debugging.
2. Fast Multi-Modal Input with Large Output
- Accepts both text and image inputs while producing text outputs.
- Offers up to 128 k output tokens, allowing long responses and code generation across multiple files.
3. Large Context & Knowledge Cut-Off
- 400 k token context window supports processing large codebases or documents.
- Knowledge cut-off of Sep 30 2024 ensures familiarity with recent tools and frameworks.
4. Reasoning Token Support
- Provides explicit support for reasoning tokens, enabling developers to fine-tune the balance between reasoning depth and speed.
Nano Banana 2
1. High-efficiency counterpart to Gemini 3 Pro Image
- Google describes Nano Banana 2 as the high-efficiency counterpart to Gemini 3 Pro Image.
- Optimized for speed and high-volume developer use cases rather than maximum pro-grade fidelity.
2. Native image generation + understanding
- Accepts text and image inputs and can output both text and images in a conversational workflow.
- Useful for quick iteration, editing, remixing, and interactive visual applications.
3. Strong throughput with practical image controls
- Supports up to 14 input images per prompt, 128 k input tokens, and 32,768 output tokens.
- Handles multiple aspect ratios and can generate or edit images while keeping latency and cost lower than higher-end image models.
4. Grounded, developer-friendly image workflows
- Supports Google Search grounding and Content Credentials (C2PA) for image outputs.
- All generated images include SynthID watermarking as part of Google's native image stack.
Use GPT-5.1 or Nano Banana 2 - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-5.1 or Nano Banana 2 - connected to your real data and ready for your whole team. No code, no deployment.
Describe it, and it's built
Tell the Appaca agent the internal tool you need and it builds a working app powered by GPT-5.1 or Nano Banana 2. No code, no API keys, no deployment.
Switch models without rebuilding
Start on GPT-5.1, test the same tool on Nano Banana 2, and keep whichever performs better - the rest of your app stays exactly as it is.
Automated for the whole team
Schedule tools to run on autopilot - daily digests, weekly reports, real-time triggers - and share them with your whole team from one workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by GPT-5.1 or Nano Banana 2 - connected to the tools you already use.
Related comparisons
See how GPT-5.1 and Nano Banana 2 stack up against other models in the directory.
FAQs
Pricing models differ: see the full GPT-5.1 and Nano Banana 2 pages in the Appaca AI models directory for current pricing details.
Context window data is listed on each model's page in the Appaca AI models directory.
It depends on the job. Compare the pricing, context window, and strengths above against your workload - and remember the choice isn't permanent. In Appaca you can build a tool on GPT-5.1, test the same tool on Nano Banana 2, and switch at any time without rebuilding anything.
Yes. Appaca is a no-code AI workspace: describe the internal tool your team needs and the Appaca agent builds it as a working app powered by GPT-5.1, Nano Banana 2, or any other model in the directory - with a built-in database, team access, and integrations. No API keys to wire up and nothing to deploy.
Build AI tools with GPT-5.1 or Nano Banana 2
Describe the tool your team needs and get a working app powered by the model you choose - with a built-in database, team access, and integrations. No code, no deployment.