Build AI products powered by GPT-5.1 or Gemini 1.5 Flash - no coding required
Start buildingGPT-5.1 vs Gemini 1.5 Flash
Compare GPT-5.1 and Gemini 1.5 Flash. Build AI products powered by either model on Appaca.
Get startedModel Comparison
| Feature | GPT-5.1 | Gemini 1.5 Flash |
|---|---|---|
| Provider | OpenAI | |
| Model Type | text | text |
| Context Window | 400,000 tokens | 1,000,000 tokens |
| Input Cost | $1.25/ 1M tokens | $0.07/ 1M tokens |
| Output Cost | $10.00/ 1M tokens | $0.30/ 1M tokens |
Build with it | Build with GPT-5.1 | Build with Gemini 1.5 Flash |
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Multi-Model Support
Power your AI product with GPT-5.1, Gemini 1.5 Flash, or any supported model. Switch anytime.
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Strengths & Best Use Cases
GPT-5.1
OpenAI1. 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.
Gemini 1.5 Flash
Google1. Extremely fast and cost-efficient
- Designed for ultra-low latency inference.
- Handles high-throughput real-time applications and large-scale pipelines.
2. Strong multimodal capabilities
- Accepts text, images, audio, video, and PDFs.
- Efficient cross-modal understanding suitable for classification, extraction, and captioning.
3. Excellent for long-context tasks
- Supports up to 1M tokens, enabling analysis of long documents, transcripts, and entire codebases.
- Performs well on long-context translation and summarization.
4. Optimized for production workloads
- Low operational cost and fast inference make it ideal for enterprise automation.
- Great for chatbots, customer support systems, and background agent tasks.
5. High throughput with scalable rate limits
- Flash variants support extremely high RPM for high-traffic environments.
6. Reliable performance on everyday tasks
- Good at chat, rewriting, transcription, extraction, and structured reasoning.
- More efficient than Pro for tasks that don't require deep reasoning.
7. Ideal for multimodal high-volume apps
- Strong performance on captioning, OCR-style extraction, audio transcription, and video understanding.
8. Designed for developer workflows
- Supports function calling, structured output, and integration with the Gemini API and Vertex AI.
Prompts to Get Started
Use these prompts to power AI products you build on Appaca. Each works great with the models above.
Best for GPT-5.1
textMarketing Event Strategy (Workshops + Networking)
Design an event strategy with persona-focused workshops, panels, and networking centered on their challenges and your USP solution.
Content Marketing Strategy (Thought Leadership)
Create a persona-first content strategy that positions your brand as a thought leader and connects your USP to the challenges you solve.
Customer Success Stories Series (Proof Library)
Create a series of customer success stories that prove your USP and show persona outcomes across common challenges.
Best for Gemini 1.5 Flash
textDevelop a Legal Strategy (Risks, Benefits, Alternatives)
Evaluate a proposed legal strategy with risks, benefits, alternatives, and a decision framework.
Blog Post Outline Generator
Generate detailed outlines for blog posts to streamline your writing process and ensure comprehensive coverage.
AI Tutor - Concept Explainer
Create an AI tutor that explains complex concepts in simple terms, adapting to the students learning level and style.
What AI product will you build?
Describe your AI product idea and Appaca will help you create it - powered by GPT-5.1, Gemini 1.5 Flash, or any model you choose.
Free to start • No coding required • Launch to customers
See how Appaca works
Turn your AI ideas into AI products with the right AI model
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Customer-facing Interface
Create and style user interfaces for your AI agents and tools easily according to your brand.
Multimodel LLMs
Create, manage, and deploy custom AI models for text, image, and audio - trained on your own knowledge base.
Agentic workflows and integrations
Create a workflow for your AI agents and tools to perform tasks and integrations with third-party services.
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“I've built with various AI tools and have found Appaca to be the most efficient and user-friendly solution.”
Cheyanne Carter
Founder & CEO, Edubuddy
Frequently Asked Questions
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Build AI products powered by GPT-5.1 or Gemini 1.5 Flash
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