Gemini 1.0 Ultra vs GPT-4.5

Gemini 1.0 Ultra (Google DeepMind) and GPT-4.5 (OpenAI) are both frontier AI models. Gemini 1.0 Ultra was published in December 2023 and GPT-4.5 in February 2025.

GPT-4.5 was trained on 3.8×10²⁶ FLOP, about 7.6x the compute of Gemini 1.0 Ultra at 5×10²⁵ FLOP. Training compute is the closest available proxy for how much was invested in a model, though it says nothing on its own about how well that compute was spent.

These two models share no benchmark on which both have been scored, so no direct performance comparison is possible here. The specification table below is a comparison of inputs, not of results.