Z.ai: GLM 5.3 vs OpenAI: GPT-5.2
z-ai vs openai
Verdict
On price, Z.ai: GLM 5.3 is cheaper (blended cost is about 0.08× that of OpenAI: GPT-5.2).
On capability, Z.ai: GLM 5.3 has the higher intelligence index (32) — better for complex reasoning.
Verdict: pick Z.ai: GLM 5.3 on a budget, or Z.ai: GLM 5.3 for output quality. Full details below.
Side-by-Side Specs
| Metric | Z.ai: GLM 5.3 | OpenAI: GPT-5.2 |
|---|---|---|
| Input /1M | $0.07 | $1.75 |
| Output /1M | $1.40 | $14.00 |
| Blended (3:1) | $0.40 | $4.81 |
| Context | 1.0M | 400K |
| Intelligence | 32 | 30 |
| Coding | 75 | 49 |
| Math | — | 99 |
| Speed | 74 tok/s | 73 tok/s |
| CPS Grade | A | A |
Z.ai: GLM 5.3 details →OpenAI: GPT-5.2 details →z-ai pricing →openai pricing →← All comparisonsCheapest General LLMs APIs →Cheapest Text Processing APIs →
FAQ
Which is cheaper, Z.ai: GLM 5.3 or OpenAI: GPT-5.2?
On price, Z.ai: GLM 5.3 is cheaper (blended cost is about 0.08× that of OpenAI: GPT-5.2). Z.ai: GLM 5.3: $0.0699 in / $1.4 out; OpenAI: GPT-5.2: $1.75 in / $14 out (per 1M tokens).
Which is smarter, Z.ai: GLM 5.3 or OpenAI: GPT-5.2?
On capability, Z.ai: GLM 5.3 has the higher intelligence index (32) — better for complex reasoning. Coding index: Z.ai: GLM 5.3 75 vs OpenAI: GPT-5.2 49.
Which one should I choose?
Verdict: pick Z.ai: GLM 5.3 on a budget, or Z.ai: GLM 5.3 for output quality. Full details below.