Llama 3.1-405B vs o3-pro
Both have similar output pricing, while o3-pro offers a larger context window. Choose Llama 3.1-405B or o3-pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Llama 3.1-405B | o3-pro |
|---|---|---|
| Provider | Meta AI | Abacus |
| Input / 1M tokens | — | $20.00 |
| Output / 1M tokens | — | $40.00 |
| Context window | — | 200K |
| Parameters | 405B | — |
| Open weights | Yes | No |
| Released | Jul 2024 | Jun 2025 |
FAQ
Is Llama 3.1-405B or o3-pro cheaper?
Llama 3.1-405B and o3-pro have comparable output pricing.
Which has the larger context window, Llama 3.1-405B or o3-pro?
o3-pro has the larger context window (200K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.