x-ai/grok-4.5Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Scores on standardized evaluations. Higher is better — and rank shows where Grok 4.5 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Grok 4.5 is an AI model developed by xAI, part of the Grok family, released Jul 8, 2026.
Grok 4.5's list price from xAI is $2 per million input tokens and $6 per million output tokens.
Grok 4.5 supports a context window of up to 500K tokens.
On standardized evaluations tracked by Epoch AI, Grok 4.5 scores 93.1% on GPQA Diamond, 54.1% on SciCode, 40.3% on Humanity's Last Exam.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 9, 2026.