GPT Image 1.5
OpenAI's high-fidelity image model — precise edits, strong text rendering, and reliable face preservation for professional workflows.
Overview
What is GPT Image 1.5
GPT Image 1.5 is OpenAI's image generation model, released in December 2025 as an upgrade to GPT Image 1. It delivers high-fidelity visuals, accurate prompt adherence, and robust editing capabilities, including inpainting and image-to-image transformations, with strong performance in text rendering and facial consistency.
Running it privately on Venice
On Venice, GPT Image 1.5 runs with full prompt anonymity—your inputs are not stored or used for training. This ensures private, uncensored access to OpenAI’s powerful image model, ideal for creators and professionals who value sovereignty over their workflows. You retain full control without account linkage or data profiling.
Assessment
Strengths and limitations
- Excellent instruction following and prompt adherence, especially for complex or detailed requests.
- Strong text rendering within images—crisp, legible, and well-integrated into scenes.
- Reliable facial and identity preservation during edits, enabling consistent character use across generations.
- Robust inpainting and image-to-image editing with natural blending and minimal artifacts.
- High-fidelity photorealism with accurate materials, lighting, and environmental detail.
- Proprietary and closed model—no open weights, so self-hosting or fine-tuning is not possible.
- Struggles with non-English text rendering and complex multilingual scenes.
- Limited to two portrait and one square aspect ratio—lacks widescreen or 4K output options.
- Higher cost per image compared to some Venice-hosted rivals, especially at high quality.
Samples
Sample outputs
Generated on Venice with our standard prompt suite — the same prompts we run through every model of this type, so you can judge it like-for-like.
A retro travel poster with the bold headline "VENICE" in large condensed serif type, sunset color palette, clean layout
Photorealistic close-up portrait of a weathered fisherman at golden hour, 85mm lens, shallow depth of field, natural skin texture
A small red cube balanced on top of a large glossy blue sphere, with a green cone to the right, plain light-grey studio background
Cozy watercolor illustration of a hillside village in autumn, warm tones, soft paper texture
Capabilities
What it supports
- Text to image
- Image to image
Specifications
Datasheet
- Maker
- OpenAI
- Released
- December 16, 2025
- Modality
- Text-to-image, image-to-image, inpainting
- Max resolution
- 1536×1024 / 1024×1536
- Quality modes
- Low, Medium, High
- Open weights
- No — proprietary
- Aspect ratios
- 1:1, 3:2, 2:3
- Prompt limit
- 5,000 chars
- Privacy on Venice
- Anonymized — prompts not stored
- Available on Venice since
- Dec 2025
- License
- Proprietary
API
Call it from your code
Venice exposes this model through the REST API. Queue a generation with the model id.
curl https://api.venice.ai/api/v1/image/generate \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-image-1-5",
"prompt": "A serene mountain lake at dawn, photorealistic"
}' --output image.pngPricing
What it costs on Venice
Flat per-image pricing on Venice: $0.26 per generation.
New Venice accounts include a free daily allowance and 500 welcome credits — no credit card required.
Alternatives
How it compares
| Model | Max resolution | Strongest at | Open weights | Price (Venice) |
|---|---|---|---|---|
| GPT Image 1.5 | 1536×1024 | Prompt adherence, text, editing | No | $0.26 / image |
| GPT Image 2 | — | — | No | from $0.27 / image |
| Flux 2 Max | — | Photoreal detail | No | $0.09 / image |
| Grok Imagine High Quality (SOTA) | — | — | No | from $0.06 / image |
Balances realism, editing precision, and text quality—ideal for professional workflows.
Use cases
What it is good for
- 01Marketing assets requiring on-image text, such as social media graphics and banners.
- 02Product mockups and e-commerce visuals with accurate branding and labels.
- 03Iterative photo editing with consistent character or scene continuity.
- 04Infographics and diagrams generated from descriptive prompts.
- 05Fashion and try-on simulations where facial features must remain consistent.
Prompting
Getting better results
Use quotes around text you want rendered in the image to improve accuracy.
Specify aspect ratio explicitly (e.g., '1536x1024') to ensure correct output dimensions.
For edits, upload the image and describe changes precisely—'replace the jacket with a red hoodie, keep face and background'.
Use 'high quality' in the prompt to trigger the best visual fidelity when supported.
Version history
Initial GPT-native image model.
Current — enhanced realism, editing, text.
FAQ
Frequently asked questions
GPT Image 1.5 is OpenAI's image generation model, released in December 2025. It improves upon GPT Image 1 with better prompt understanding, more realistic outputs, and enhanced editing capabilities like inpainting and image-to-image transformations.
On Venice, GPT Image 1.5 costs $0.26 per image generated, with additional fees for upscaling: $0.02 for 2× and $0.08 for 4×. Pricing is flat per generation, with no subscription required.
No, GPT Image 1.5 is not free. It operates on a per-image credit system on Venice, with no free tier. Each generation costs $0.26, making it suitable for professional or high-value use cases.
No. GPT Image 1.5 is a closed, proprietary model developed by OpenAI. It cannot be self-hosted, modified, or fine-tuned. There are no open weights available for public use.
Yes. GPT Image 1.5 supports image-to-image generation and inpainting, allowing you to upload and modify existing images with precise edits while preserving key elements like faces and lighting.
No. GPT Image 1.5 is a specialized image generation model and does not support external tool use or function calling. It operates solely on text and image inputs to produce visual outputs.
GPT Image 1.5 supports three aspect ratios: 1:1 (1024×1024), 3:2 (1536×1024), and 2:3 (1024×1536). These are fixed resolutions optimized for common creative and publishing formats.
GPT Image 2 is the newer successor with improved reasoning, higher resolution support, and better text rendering. GPT Image 1.5 remains strong in editing and prompt adherence but lacks the 4K output and advanced planning features of GPT Image 2.
Run GPT Image 1.5 privately
No prompt logging. No data used for training.