Pixmo (GPT Image 2) vs GPT Image 1.5: Which Should You Use?
★ TL;DR
GPT Image 1.5 is the previous OpenAI generation. Pixmo runs GPT Image 2 — strictly better at text, 4K, and reasoning.
OpenAI's previous image model, available via the OpenAI API. Being phased out by GPT Image 2.
Side-by-side: 8 metrics that decide it
| Metric | Pixmo (GPT Image 2) | GPT Image 1.5 |
|---|---|---|
| Text rendering accuracy | ~95% | ~70% |
| Photorealism (LMArena Elo) | 1512 | 1264 |
| Character consistency | ★★★ | ★ |
| Native 4K output | ★★★ | — |
| OpenAI-compatible API | ★★★ | ★★ |
| Commercial license | ★★★ | ★★ |
| Multilingual / CJK / Arabic | ★★★ | ★ |
| Conversational editing | ★★★ | ★ |
✓ Pick Pixmo (GPT Image 2) if
- you want native 4K (1.5 caps at 1536×1024)
- you want ~95% text accuracy instead of ~70%
- you want a no-card free tier and a managed dashboard
✗ Pick GPT Image 1.5 if
- you have stable production code on GPT Image 1.5 and don't need GPT Image 2's improvements yet
- your specific aesthetic is calibrated to 1.5's output and migrating would break batches
Pricing
Pixmo: Pixmo: 60 free credits, then $0.05 / 1K image (12 credits each).
GPT Image 1.5: $0.04 per standard image · Free tier: ChatGPT Plus only
FAQ
- Should I migrate from GPT Image 1.5 to 2?
- Yes for new projects. For existing projects, evaluate output drift on a representative sample first — the aesthetic is similar but not identical.
- Is the API different between 1.5 and 2?
- Pixmo abstracts this — its OpenAI-compatible endpoint accepts both. Direct OpenAI API users can switch by changing the model parameter.