Traders assign a 94.2% implied probability to “No” because xAI’s public roadmap centers on scaling its existing Grok transformer architecture rather than pivoting to a diffusion large language model. Recent releases such as Grok 4.3, which added native video input and expanded context windows, demonstrate continued iteration on the current stack with no official signals of diffusion research or architecture changes. Pre-training for larger Grok 5 variants remains the stated priority through at least the second half of 2026, and diffusion models require distinct training pipelines and benchmarks that xAI has not referenced. A last-minute internal breakthrough or undisclosed partnership could still shift the outcome, but absent any credible reporting, the near-term timeline makes release by June 30 highly improbable.