GLM-5.3 FlashX API pricing
Official GLM (Z.ai) list price, last checked Oct 29, 2026. Updated Oct 29, 2026.
GLM-5.3 FlashX costs $0.37 per 1M input tokens and $1.25 per 1M output tokens, cached input at $0.075, per GLM (Z.ai)'s official pricing page (checked Oct 29, 2026). It's priced in the middle of the pack: number 19 of 77 by blended price ($0.59 per 1M tokens at a 3 to 1 input to output mix). LMArena doesn't list it on the boards we track, so we don't rank its quality. For less, look at Mistral Small 4 ($0.2625 blended).
GLM-5.3 FlashX price per million tokens
| GLM-5.3 FlashX price per million tokens | USD |
|---|---|
| Input | $0.37 |
| Cached input | $0.075 |
| Output | $1.25 |
| Blended, 3 parts input to 1 part output | $0.59 |
| Context window | Not listed |
GLM (Z.ai) lists one flat rate for GLM-5.3 FlashX: no long-prompt surcharge or tier is shown on the pricing page we checked.
What GLM-5.3 FlashX costs for real work
List-price estimates for a month, no discounts. Our math, not a quote: change the token counts in the plan vs API calculator.
| Workload | Tokens a month | GLM-5.3 FlashX | Qwen3 Coder Flash | Mistral Small 4 |
|---|---|---|---|---|
| Light: a side project or personal assistant | 2M in, 0.5M out | $1.36 | $1.35 | $0.60 |
| Medium: a small team or one product feature | 20M in, 5M out | $13.65 | $13.50 | $6.00 |
| Heavy: a production app | 200M in, 50M out | $136 | $135 | $60.00 |
| Medium with 80% of input cached | 20M in (16M cached), 5M out | $8.93 | n/a | $3.84 |
How GLM-5.3 FlashX ranks on LMArena
It isn't on any LMArena board we track as of Oct 29, 2026. We don't estimate quality for unranked models. See the best model for each task for ranked options.
Closest rivals to GLM-5.3 FlashX
The models nearest in price, other makers first. Ranks are on LMArena, where we have them.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| Qwen3 Coder Flash | $0.30 / $1.50 | $0.60 | Same price, no score to separate them. Compare |
| Qwen3.6 Flash | $0.25 / $1.50 | $0.5625 | Qwen3.6 Flash wins on price. Compare |
| MiMo-V2.6 Pro | $0.435 / $0.87 | $0.5437 | MiMo-V2.6 Pro wins on price. Compare |
| DeepSeek V4.1 Flash | $0.30 / $1.20 | $0.525 | DeepSeek V4.1 Flash wins on price. Compare |
Cheaper alternatives to GLM-5.3 FlashX
At least 40% cheaper blended, cheapest at the bottom of the list we found.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| Mistral Small 4 | $0.15 / $0.60 | $0.2625 | Mistral Small 4 wins on price. Compare |
| MiniMax-M3.1 Flash | $0.15 / $0.60 | $0.2625 | MiniMax-M3.1 Flash wins on price. Compare |
| GLM-5.3 Flash | $0.15 / $0.50 | $0.2375 | GLM-5.3 Flash wins on price. Compare |
More from GLM (Z.ai)
- GLM-5.3 Flash$0.15 in, $0.50 out per 1M
- GLM-4.7$0.60 in, $2.20 out per 1M
- GLM-4.6$0.60 in, $2.20 out per 1M
- GLM-5$1 in, $3.20 out per 1M
- GLM-5.3$1.40 in, $4.40 out per 1M
FAQ
How much does the GLM-5.3 FlashX API cost per million tokens?
$0.37 per 1M input tokens and $1.25 per 1M output tokens, plus $0.075 per 1M for cached input, as of Oct 29, 2026. A typical 3 to 1 input to output mix works out to $0.59 per 1M tokens.
Does GLM-5.3 FlashX charge more for long prompts?
No. GLM (Z.ai) lists a single rate on its pricing page.
Is GLM-5.3 FlashX cheaper than Qwen3 Coder Flash?
No. A medium month (20M input and 5M output tokens) costs $13.65 on GLM-5.3 FlashX and $13.50 on Qwen3 Coder Flash at list price.
How does GLM-5.3 FlashX rank on LMArena?
It isn't listed on the LMArena boards we track, so we show no quality rank rather than guess.
What is a cheaper alternative to GLM-5.3 FlashX?
Mistral Small 4 costs $0.15 in and $0.60 out per 1M tokens, about 2.2x less blended.
Where does this GLM-5.3 FlashX price come from?
From GLM (Z.ai)'s official pricing page, which we check every day. This page was last checked Oct 29, 2026.