Mercury 2.5 Preview is cheaper than GPT-5.4 at $0.04/M vs $2.5/M input tokens.
| Spec | GPT-5.4 | Mercury 2.5 Preview |
|---|---|---|
| Input price | $2.5/M tokens | $0.04/M tokens |
| Output price | $15/M tokens | $0.15/M tokens |
| Context window | 1.1M tokens | 260K tokens |
| Released | Mar 2026 | Aug 2026 |
Not enough votes to call it. On the specs, GPT-5.4 has the edge: bigger model tier, bigger context window, major provider backing.
Mercury 2.5 Preview costs 100x less per token.
Mercury 2.5 Preview is cheaper on both — 63× input, 100× output
Mercury 2.5 Preview uses 10.4x more transitions
Mercury 2.5 Preview is cheaper than GPT-5.4 at $0.04/M vs $2.5/M input tokens.
| Spec | GPT-5.4 | Mercury 2.5 Preview |
|---|---|---|
| Input price | $2.5/M tokens | $0.04/M tokens |
| Output price | $15/M tokens | $0.15/M tokens |
| Context window | 1.1M tokens | 260K tokens |
| Released | Mar 2026 | Aug 2026 |
Not enough votes to call it. On the specs, GPT-5.4 has the edge: bigger model tier, bigger context window, major provider backing.
Mercury 2.5 Preview costs 100x less per token.
Mercury 2.5 Preview is cheaper on both — 63× input, 100× output
Mercury 2.5 Preview uses 10.4x more transitions