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Get started freeGPT-5.1 vs GPT-4o mini
Compare GPT-5.1 and GPT-4o mini. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | GPT-5.1 | GPT-4o mini |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Model Type | text | text |
| Context Window | 400,000 tokens | 128,000 tokens |
| Input Cost | $1.25/ 1M tokens | $0.15/ 1M tokens |
| Output Cost | $10.00/ 1M tokens | $0.60/ 1M tokens |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by GPT-5.1, GPT-4o mini, for your specific use case.
Build your first app freeStrengths & 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.
GPT-4o mini
OpenAI1. Fast, cost-efficient performance
- Designed for low-latency, high-throughput workloads.
- Ideal for production systems where speed and budget matter more than deep reasoning power.
2. Great for focused NLP tasks
- Excels at classification, tagging, entity extraction, rewriting, paraphrasing, and SEO tasks.
- Strong at translation and keyword generation due to efficient language understanding.
3. Multimodal input capable (text + image)
- Accepts images for lightweight visual analysis, categorization, or extraction.
- Outputs text only, ensuring deterministic and easily integrated responses.
4. Supports advanced developer features
- Structured Outputs for predictable schemas.
- Function calling for building tool-augmented agents.
- Fully compatible with Batch API for large-scale processing.
5. Easy to fine-tune
- One of the best OpenAI models for domain-specific fine-tuning.
- Allows organizations to compress larger models' behavior (like GPT-4o) into a smaller footprint.
6. Suitable for distillation workflows
- Can approximate GPT-4o or GPT-5 outputs using distillation, dramatically reducing cost.
- Enables scalable deployment for high-volume applications.
7. Large context window for its size
- 128K context supports multi-step tasks, multi-document inputs, and long-running conversations.
- Useful for agents that need memory across extended sessions.
8. Reliable for commercial production
- Stable, predictable, and low-variance outputs make it ideal for automation and enterprise stacks.
- Works well in synchronous or asynchronous pipelines.
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
textChange Management Announcement
Write a clear internal announcement communicating an organisational change.
Salary Negotiation Script
Write a professional script for negotiating a salary offer or raise.
Quarterly Business Review (QBR) Template
Structure a quarterly business review covering results and priorities.
Best for GPT-4o mini
textBundle Upsell Offer Copy
Promote a product bundle to increase cart value. Highlights savings and convenience to encourage the upgrade.
Home Sale Process Timeline Email
Send a seller client a step-by-step home sale timeline email. Reduces anxiety and sets clear expectations for the process.
Raise Request Email
Write a professional email requesting a salary raise. Evidence-led and sets up a productive conversation.