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Get started freeGPT Image 1.5 vs Gemini 2.5 Pro Experimental
Compare GPT Image 1.5 and Gemini 2.5 Pro Experimental. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | GPT Image 1.5 | Gemini 2.5 Pro Experimental |
|---|---|---|
| Provider | OpenAI | |
| Model Type | image | text |
| Context Window | N/A | 1,048,576 tokens |
| Input Cost | $5.00/ 1M tokens | $1.50/ 1M tokens |
| Output Cost | N/A | $6.00/ 1M tokens |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by GPT Image 1.5, Gemini 2.5 Pro Experimental, for your specific use case.
Build your first app freeStrengths & Best Use Cases
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.
Gemini 2.5 Pro Experimental
Google1. State-of-the-art reasoning performance
- #1 on LMArena human preference leaderboard.
- Excels at advanced reasoning benchmarks like GPQA and AIME 2025.
- Achieves 18.8% on Humanity's Last Exam (no tools), representing frontier human-level reasoning.
2. New “thinking model” architecture
- Built with explicit reasoning steps internally before responding.
- Handles complex, multi-stage logic with higher accuracy and fewer hallucinations.
3. Elite science and mathematics capabilities
- Leads in math and science tasks across industry benchmarks.
- High performance without costly inference tricks like majority voting.
4. Exceptional coding abilities
- Major leap over Gemini 2.0 in coding performance.
- 63.8% on SWE-Bench Verified with custom agent setup.
- Strong at code transformation, debugging, and building agentic apps.
- Capable of generating full applications (e.g., a playable video game) from a single-line prompt.
5. Massive multimodal context
- Ships with a 1,000,000 token window (2M coming soon).
- Handles entire documents, datasets, video sequences, audio files, and large codebases.
- Maintains strong performance even at extreme context lengths.
6. Native multimodality across all inputs
- Understands and reasons over text, images, audio, video, and code.
- Designed for real-world, multi-source problem-solving and agent workflows.
7. Consistent high-quality outputs
- Improved post-training results in more accurate, coherent, and stylistically strong responses.
- Higher reliability across complex workloads.
8. Early availability for developers
- Available today in Google AI Studio for experimentation.
- Coming soon to Vertex AI with higher rate limits and production-ready access.
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 Image 1.5
imageEulogy Speech
Write a respectful and heartfelt eulogy that celebrates a life lived. Comforts the grieving while honoring the person's unique character.
University Personal Statement
Write a compelling university personal statement for undergraduate or graduate admissions. Connects passion, experience, and future goals.
Co-Marketing Partnership Email
Announce a co-marketing collaboration between two complementary brands. Expands reach and provides cross-audience value.
Best for Gemini 2.5 Pro Experimental
textEmail Thread Summary
Summarise a long email thread into key points and required actions.
Print Ad Copy for Listing
Write a print advertisement for a property listing in a local newspaper or real estate magazine. Compact and compelling.
Exit Ticket Creator
Generate quick formative assessments that gauge student understanding and inform next-day instruction.