DeepSeek V4 Flash 0731 vs Mercury 2.5
Price, context window & benchmark comparison
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Verdict: Mercury 2.5 is 34% cheaper than DeepSeek V4 Flash 0731 on a typical 3:1 input/output mix. DeepSeek V4 Flash 0731 has the larger context window (1.3M vs 260K).
| DeepSeek V4 Flash 0731 | Mercury 2.5 | |
|---|---|---|
| Input price / 1M | $0.03 | $0.04 |
| Output price / 1M | $0.32 | $0.15 |
| Blended price (3:1) | $0.10 | $0.0675 |
| Cached input / 1M | $0.016 | $0.004 |
| Context window | 1.3M | 260K |
| Max output | 944K | 66K |
| Intelligence index | 34.3 | — |
| Coding index | 69.1 | — |
| Providers | 30 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | No | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-07-31 | 2026-09-08 |
| Retirement | — | — |
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FAQ
Which is cheaper, DeepSeek V4 Flash 0731 or Mercury 2.5?
Mercury 2.5 is 34% cheaper than DeepSeek V4 Flash 0731 on a typical 3:1 input/output mix.
DeepSeek V4 Flash 0731 vs Mercury 2.5: which has a bigger context window?
DeepSeek V4 Flash 0731: 1,310,720 tokens. Mercury 2.5: 260,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: DeepSeek V4 Flash 0731 ≈ $220.00, Mercury 2.5 ≈ $155.00.
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