GPT-5.6 Pro Leaks: Coming Thursday
- Knowledge cutoff: December 2025 (previous versions had August 2025).
- Reasoning effort ("Juice Value") increased to 960 (vs 768 on GPT-5.5).
- Vision and image to design replication are much better (it can almost copy designs)
- SVG generation, especially 3D/static SVGs, is excellent and can outperform Fable 5.
- Frontend generation has improved, but Fable/Claude still have the edge.
- Game generation is more stable with fewer visual glitches, though Fable 5 is still better overall.
- Playwright support is in ChatGPT for browser automation.
- GPT-5.6 / GPT-5.6 Pro is most likely coming Thursday.