Grok 4 (xAI) and Inflection-2 (Inflection AI) are both frontier AI models. Grok 4 was published in July 2025 and Inflection-2 in November 2023.
Grok 4 was trained on 5 x 10^26 FLOP, about 50.0x the compute of Inflection-2 at 10^25 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.
| Field | Grok 4 | Inflection-2 |
|---|---|---|
| Organization | xAI | Inflection AI |
| Published | Jul 9, 2025 | Nov 22, 2023 |
| Training compute | 5 x 10^26 FLOP | 10^25 FLOP |
| Parameters | 3T | — |
| Training hardware | — | NVIDIA H100 SXM5 80GB |
| Chips used | 200,000 | 5,000 |
| Training cost (2023 USD) | $388M | $13M |
| Training power draw | — | 6.9 MW |
| Accessibility | API access | Hosted access (no API) |
| Open weights | No | No |
| Country | United States | United States |
