Sep 21, 2026
SpaceXAI released Grok 4.5, its first model since going public, trained in collaboration with Cursor and priced significantly lower than competing models from Anthropic and OpenAI. While trailing GPT-5.5 and Fable 5 in coding benchmarks, the model uses 4.2 times fewer tokens than Opus 4.8 and costs a fraction of competitors.