GLM 5.3 FlashX vs Mercury 2
Price, context window & benchmark comparison
VS
Compare different models
Verdict: Mercury 2 is 36% cheaper than GLM 5.3 FlashX on a typical 3:1 input/output mix. GLM 5.3 FlashX has the larger context window (1M vs 128K).
| GLM 5.3 FlashX | Mercury 2 | |
|---|---|---|
| Input price / 1M | $0.37 | $0.25 |
| Output price / 1M | $1.25 | $0.75 |
| Blended price (3:1) | $0.59 | $0.38 |
| Cached input / 1M | $0.09 | $0.025 |
| Context window | 1M | 128K |
| Max output | 131K | 50K |
| Intelligence index | — | — |
| Coding index | — | 31.1 |
| Providers | 1 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-18 | 2026-03-04 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GLM 5.3 FlashX or Mercury 2?
Mercury 2 is 36% cheaper than GLM 5.3 FlashX on a typical 3:1 input/output mix.
GLM 5.3 FlashX vs Mercury 2: which has a bigger context window?
GLM 5.3 FlashX: 1,048,576 tokens. Mercury 2: 128,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GLM 5.3 FlashX ≈ $1,365, Mercury 2 ≈ $875.00.
More comparisons
GLM 5.3 FlashX vs GLM 5.3 PrimeGLM 5.3 FlashX vs Qwen3.8 Max PrimeGLM 5.3 FlashX vs Command A+GLM 5.3 FlashX vs GPT-6 Luna ProGLM 5.3 FlashX vs GPT-6 LunaGLM 5.3 FlashX vs GPT-6 Sol ProGLM 5.3 FlashX vs GPT-6 SolGLM 5.3 FlashX vs Claude Opus 5.5GLM 5.3 FlashX vs MiMo-V2.6-Pro-UltraSpeedGLM 5.3 FlashX vs MiMo-V2.6-FlashGLM 5.3 FlashX vs Grok 4.7GLM 5.3 FlashX vs Qwen3.8 Omni FlashGLM 5.3 FlashX vs DeepSeek V4.1 FlashGLM 5.3 FlashX vs GPT-6 AstraGLM 5.3 FlashX vs GPT-6 Astra ProGLM 5.3 FlashX vs Qwen3.8 Max (0902)Mercury 2 vs GLM 5.3 PrimeMercury 2 vs Qwen3.8 Max PrimeMercury 2 vs Command A+Mercury 2 vs GPT-6 Luna ProMercury 2 vs GPT-6 LunaMercury 2 vs GPT-6 Sol ProMercury 2 vs GPT-6 SolMercury 2 vs Claude Opus 5.5