GLM-4.5 Air is the safer default for most buyers here. It creates the cleaner cost story, and the savings gap is meaningful enough that you should only move to ChatGPT Chat Latest if you have a clear quality reason.
Standard request winner
GLM-4.5 Air
Saves about 96% versus the pricier option for the baseline request shape.
Scale winner
GLM-4.5 Air
Saves about 96% once usage becomes a recurring operating expense.
Default recommendation
GLM-4.5 Air
Best starting point for most buyers unless you already know you need the premium alternative.
Option A
OpenAI
Option B
Zhipu AI
Decision scenarios
This reframes the comparison around real buying situations, not just benchmark curiosity.
Budget-first pick
GLM-4.5 Air wins the standard request scenario, so it is the safer default if you are still validating usage and want cheaper per-call economics.
Scale decision
GLM-4.5 Air stays ahead in the high-volume scenario, which matters most once the workload becomes a real operating expense instead of a prototype line item.
Capability-first pick
ChatGPT Chat Latest has the stronger capability signal across context, positioning, and premium model attributes. Pick it when reasoning depth or delivery quality matters more than raw token cost.
Input cost / 1M
Lower is better if prompt volume is the main driver.
ChatGPT Chat Latest
$5.00
GLM-4.5 Air
$0.20
Output cost / 1M
Lower is better for chat, generation, and verbose outputs.
ChatGPT Chat Latest
$30.00
GLM-4.5 Air
$1.10
Standard request total
Based on 10,000 input and 10,000 output tokens.
ChatGPT Chat Latest
$0.35
GLM-4.5 Air
$0.013
Context window
Higher is better when you need fewer prompt-chunking compromises.
ChatGPT Chat Latest
128K
GLM-4.5 Air
128K
Standard request
10,000 input / 10,000 output tokens
ChatGPT Chat Latest
$0.35
$0.05 input + $0.30 output
GLM-4.5 Air
$0.013
$0.002 input + $0.011 output
High-volume scenario
2M input / 2M output tokens
ChatGPT Chat Latest
$70.00
GLM-4.5 Air
$2.60
At scale, the cheaper option saves roughly 96% if your workload shape stays similar.
Cost estimates are generated from published input and output token rates for each provider. We apply identical token scenarios to both models so the result reflects pricing differences first, then layer on context and product-positioning signals to make the page more decision-ready. This page should help you narrow the choice quickly, but final selection should still be validated against your own prompts, quality bar, and latency requirements.
Go Deeper
See how to decide between premium, mid-tier, and bulk models without overpaying.
Map model pricing to budget controls, approval rules, and team-level usage governance.
Turn comparison insights into routing and caching policies that actually save money.