GLM 5.3 FlashX vs o4 Mini

Price, context window & benchmark comparison

Z

GLM 5.3 FlashX

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

o4 Mini

OpenAI
$1.10 / $4.40
Input / Output · per 1M tokens
Compare different models
Z
O
Verdict: GLM 5.3 FlashX is 3.3× cheaper than o4 Mini on a typical 3:1 input/output mix. GLM 5.3 FlashX has the larger context window (1M vs 200K).
GLM 5.3 FlashXo4 Mini
Input price / 1M$0.37$1.10
Output price / 1M$1.25$4.40
Blended price (3:1)$0.59$1.93
Cached input / 1M$0.09$0.28
Context window1M200K
Max output131K100K
Intelligence index
Coding index
Providers1
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-182025-04-16
Retirement

Cost calculator

FAQ

Which is cheaper, GLM 5.3 FlashX or o4 Mini?

GLM 5.3 FlashX is 3.3× cheaper than o4 Mini on a typical 3:1 input/output mix.

GLM 5.3 FlashX vs o4 Mini: which has a bigger context window?

GLM 5.3 FlashX: 1,048,576 tokens. o4 Mini: 200,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 FlashX ≈ $1,365, o4 Mini ≈ $4,400.

More comparisons