Home › Compare › Z.ai: GLM 5.3 FlashX vs Z.ai: GLM 5.3 Prime
Z.ai: GLM 5.3 FlashX vs Z.ai: GLM 5.3 Prime: API Pricing Compared
Comparing Z.ai: GLM 5.3 FlashX and Z.ai: GLM 5.3 Prime: on combined input+output list price, Z.ai: GLM 5.3 FlashX is cheaper at $1.62 vs $11.6 per 1M tokens — a difference of $9.98 (86%). Z.ai: GLM 5.3 FlashX costs $0.37 in / $1.25 out with a 1,048,576-token context; Z.ai: GLM 5.3 Prime costs $2.8 in / $8.8 out with a 1,000,000-token context.
| Z.ai: GLM 5.3 FlashX | Z.ai: GLM 5.3 Prime | |
|---|---|---|
| Input /1M | $0.37 | $2.8 |
| Output /1M | $1.25 | $8.8 |
| Cached input /1M | $0.09 | $0.56 |
| Context window | 1,048,576 | 1,000,000 |
| Max output tokens | 131,072 | 131,072 |
| Cost @ 10M in + 2M out / mo | $6.2 | $45.6 |
Estimate your own workload in the cost calculator, or open the full pages for Z.ai: GLM 5.3 FlashX and Z.ai: GLM 5.3 Prime.
Frequently asked questions
Which is cheaper, Z.ai: GLM 5.3 FlashX or Z.ai: GLM 5.3 Prime?
Z.ai: GLM 5.3 FlashX is cheaper on combined list price: $1.62 vs $11.6 per 1M tokens (input + output). At 10M input + 2M output tokens per month, Z.ai: GLM 5.3 FlashX costs $6.2 and Z.ai: GLM 5.3 Prime costs $45.6.
Which has the larger context window, Z.ai: GLM 5.3 FlashX or Z.ai: GLM 5.3 Prime?
Z.ai: GLM 5.3 FlashX has a context window of 1,048,576 tokens; Z.ai: GLM 5.3 Prime has 1,000,000 tokens. The larger one is Z.ai: GLM 5.3 FlashX.
Price snapshot October 21, 2026, refreshed daily.