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Get started freeGPT-5.1 vs GPT Image 1.5
Compare GPT-5.1 and GPT Image 1.5. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | GPT-5.1 | GPT Image 1.5 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Model Type | text | image |
| Context Window | 400,000 tokens | N/A |
| Input Cost | $1.25/ 1M tokens | $5.00/ 1M tokens |
| Output Cost | $10.00/ 1M tokens | N/A |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by GPT-5.1, GPT Image 1.5, for your specific use case.
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New appStrengths & 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 Image 1.5
OpenAI1. State-of-the-Art Image Generation
- Produces high-quality, detailed images optimized for realism, style control and prompt fidelity.
- Designed to handle complex visual scenes, compositions and lighting conditions.
2. Natively Multimodal Architecture
- Understands and reasons over both text and images as inputs.
- Ideal for workflows like editing based on reference images, expanding sketches or mockups and visual concept development.
3. Flexible Output Resolutions & Quality Levels
- Supports multiple resolutions including 1024x1024, 1024x1536 and 1536x1024.
- Offers three quality tiers (Low, Medium, High) to balance cost, speed and maximum detail.
4. Multiple Pricing Models
- Pay-per-token for multimodal input: text tokens and image tokens.
- Pay-per-image generation for final output: low, medium and high quality tiers.
- Enables businesses to balance cost and output needs.
5. Broad Use Cases
- Product photography and marketing assets.
- Illustration, concept art and creative ideation.
- UX/UI mockups.
- Style-guided image creation.
- Generating reference images for design or storytelling.
6. Supported Across Major API Endpoints
- Available via Chat Completions, Responses, Realtime, Assistants and Images (generations/edits) endpoints.
- Allows tight integration into automated creative pipelines or user-facing apps.
7. Simplified Model Behavior for Stability
- No streaming, function calling, structured outputs or fine-tuning; focused solely on high-quality image generation.
8. Consistent Results via Snapshots
- Supports snapshots for version locking to ensure long-term reproducibility.
9. Ideal For
- Designers, marketers and creatives.
- Product teams needing image assets.
- App builders integrating image generation workflows.
- Agencies producing visual content at scale.
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
textStudent Assignment Feedback
Write constructive, specific feedback on a student's assignment.
Bug Report Template
Write a thorough bug report that gives developers everything needed to reproduce.
GitHub README File
Write a comprehensive README file for an open source or internal project.
Best for GPT Image 1.5
imageDating Profile Bio
Write an authentic, engaging dating profile bio that attracts compatible matches. Balances confidence with approachability.
Electronics Category Description
Generate a category page description for an electronics section. Balances technical credibility with accessible language.
Product Launch Announcement
Write a compelling product launch announcement for your store. Ideal for email campaigns and homepage hero copy.