GLM 5.3 FlashX vs Mercury 2.5

Price, context window & benchmark comparison

Z.ai (Zhipu)

GLM 5.3 FlashX

Z.ai (Zhipu)
$0.37 / $1.25
Input / Output · per 1M tokens
VS
Inception

Mercury 2.5

Inception
$0.04 / $0.15
Input / Output · per 1M tokens
Compare different models
Z.ai (Zhipu)
Inception
Verdict: Mercury 2.5 is 8.7× 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 260K).
GLM 5.3 FlashXMercury 2.5
Input price / 1M$0.37$0.04
Output price / 1M$1.25$0.15
Blended price (3:1)$0.59$0.0675
Cached input / 1M$0.09$0.004
Context window1M260K
Max output131K66K
Intelligence index
Coding index
Providers1
Best provider uptime (30m)100.0%
Vision inputYesNo
ReasoningYesYes
Tool callingYesYes
Released2026-09-182026-09-08
Retirement

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FAQ

Which is cheaper, GLM 5.3 FlashX or Mercury 2.5?

Mercury 2.5 is 8.7× cheaper than GLM 5.3 FlashX on a typical 3:1 input/output mix.

GLM 5.3 FlashX vs Mercury 2.5: which has a bigger context window?

GLM 5.3 FlashX: 1,048,576 tokens. Mercury 2.5: 260,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 FlashX ≈ $1,365, Mercury 2.5 ≈ $155.00.

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