Build AI powered apps for your work

Get started free
LLM ComparisonGPT Image 1.5Grok 4

GPT Image 1.5 vs Grok 4

Compare GPT Image 1.5 and Grok 4. Build AI products powered by either model on Appaca.

Model Comparison

FeatureGPT Image 1.5Grok 4
ProviderOpenAIxAI
Model Typeimagetext
Context WindowN/A256,000 tokens
Input Cost
$5.00/ 1M tokens
$3.00/ 1M tokens
Output CostN/A
$15.00/ 1M tokens

Stop choosing. Use both.

With Appaca you don't have to pick — build apps that are powered by GPT Image 1.5, Grok 4, for your specific use case.

Build your first app free

Strengths & Best Use Cases

GPT Image 1.5

OpenAI

1. 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.

Grok 4

xAI

1. Flagship-level reasoning and math performance

  • Designed for world-class reasoning depth, precision, and multi-step logical chains.
  • Excels at STEM, mathematics, symbolic operations, proofs, and analytical workloads.

2. Powerful multimodal understanding

  • Supports text, images, and other modalities.
  • Handles cross-modal reasoning tasks requiring context synthesis.

3. Extreme capability across diverse tasks

  • Positioned as a top-tier 'jack of all trades' model.
  • Strong in natural language, coding, knowledge retrieval, and structured generation.

4. Large 256K context window

  • Enables analysis of long documents, entire codebases, multi-document packs, and extensive agent sessions.
  • Supports workloads that require persistent reasoning across large inputs.

5. Advanced developer tooling support

  • Function calling for tool-augmented workflows.
  • Structured outputs for predictable, schema-controlled generation.
  • Integrates smoothly with agents and complex automation pipelines.

6. Efficient caching for cost reduction

  • Cached input tokens discounted to $0.75 / 1M tokens.
  • Encourages RAG, retrieval pipelines, and multi-step conversational workflows.

7. Production-ready performance

  • Stable rate limits: 480 requests per minute.
  • High token throughput: 2,000,000 tokens per minute.
  • Available across multiple xAI regional clusters.

8. Optional Live Search augmentation

  • Add-on: $25 per 1K sources.
  • Enhances factual accuracy and real-time information retrieval.