OpenAI o4-mini is cheaper than Llama 3.1 405B at $1.1/M vs $2.7/M input tokens.
| Spec | Llama 3.1 405B | OpenAI o4-mini |
|---|---|---|
| Input price | $2.7/M tokens | $1.1/M tokens |
| Output price | $3.1/M tokens | $4.4/M tokens |
| Context window | 128K tokens | — |
| Parameters | 405B | Not disclosed |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2024 | Apr 2025 |
Not enough votes to call it. On the specs, nothing separates them.
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OpenAI o4-mini wins input (2.5× cheaper)·Llama 3.1 405B wins output (1.4× cheaper)
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Per million tokens. Prices and uptime via OpenRouter, checked 26 Sep 2026.
Llama 3.1 405B uses 2.9x more emoji