Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Llama 3.1 Instruct 405B | Grok 4.5 (high) |
|---|---|---|
| Input ($/M tokens) | $2.75 | $2 |
| Output ($/M tokens) | $6.5 | $6 |
Data from Artificial Analysis API — 12 benchmarks
Grok 4.5 (high) is cheaper overall. Its blended price (3:1 input/output ratio) is $3.00/M tokens vs $3.69/M for Llama 3.1 Instruct 405B.
Llama 3.1 Instruct 405B wins 7 out of 12 benchmarks compared to 5 for Grok 4.5 (high). See the detailed benchmark chart above for per-category results.
Grok 4.5 (high) generates tokens faster at 96 tok/s vs 82 tok/s. Llama 3.1 Instruct 405B also has lower time-to-first-token (0.69s vs 17.19s).
Choose based on your priorities: Grok 4.5 (high) for lower cost, Llama 3.1 Instruct 405B for stronger benchmark performance, and Grok 4.5 (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.