Mercury 2.5 is cheaper than OpenAI Codex Mini at $0.04/M vs $1.5/M input tokens.
| Spec | OpenAI Codex Mini | Mercury 2.5 |
|---|---|---|
| Input price | $1.5/M tokens | $0.04/M tokens |
| Output price | $6/M tokens | $0.15/M tokens |
| Context window | 200K tokens | 260K tokens |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Sep 2026 |
Not enough votes to call it. On the specs, Mercury 2.5 has the edge: bigger model tier, newer.
Mercury 2.5 costs 40x less per token.
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Mercury 2.5 is cheaper on both: 38× input, 40× output.
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.