Comparisons
GLM 5.3 vs GPT 5.6 Luna
Side-by-side pricing and capabilities on the API Stock API — one key, one prepaid balance.
What 10M input tokens cost
GLM 5.3
$1.93
$0.193 input price per 1M tokens
GPT 5.6 Luna
$1.95
$0.195 input price per 1M tokens
GLM 5.3 costs $0.02 less per 10M input tokens — 1% cheaper than GPT 5.6 Luna. Both are billed from the same prepaid balance, so switching costs nothing.
Side by side
| Attribute | GLM 5.3 | GPT 5.6 Luna |
|---|---|---|
| Type | Chat | Chat |
| Provider | Zhipu | OpenAI |
| Starting price | $0.193 input price per 1M tokens | $0.195 input price per 1M tokens |
| 10M input tokens | $1.93 | $1.95 |
| Price options | 3 | 4 |
| Parameters | 0 | 0 |
| Capabilities | — | — |
| Details | View GLM 5.3 → | View GPT 5.6 Luna → |
Frequently asked questions
Which is cheaper, GLM 5.3 or GPT 5.6 Luna?
GLM 5.3 is the cheaper of the two: $0.193 against $0.195 per 1M input tokens. Both are usage-based, so you pay per request with no subscription and no minimum.
What do GLM 5.3 and GPT 5.6 Luna cost for 10M input tokens?
10M input tokens cost $1.93 on GLM 5.3 and $1.95 on GPT 5.6 Luna — a difference of $0.02, or 1% less on GLM 5.3. Both draw on the same prepaid balance.
What can GLM 5.3 do that GPT 5.6 Luna cannot?
Their published capabilities match, so the practical differences between GLM 5.3 and GPT 5.6 Luna are price and the parameters each accepts.
Can I switch between GLM 5.3 and GPT 5.6 Luna?
Yes. Both run behind the same API Stock endpoint, so switching means changing the model field in the request body. The same API key and the same prepaid balance cover both, and there is nothing else to migrate.