GLM-5.3 Flash API pricing
Official GLM (Z.ai) list price, last checked Oct 29, 2026. Updated Oct 29, 2026.
GLM-5.3 Flash costs $0.15 per 1M input tokens and $0.50 per 1M output tokens, cached input at $0.03, per GLM (Z.ai)'s official pricing page (checked Oct 29, 2026). It's one of the cheapest models we track: number 11 of 77 by blended price ($0.2375 per 1M tokens at a 3 to 1 input to output mix). On LMArena's Code Arena it ranks #21 of 50 models we price (relative score 25 out of 100). It's one of our LMArena value picks for coding, chat.
GLM-5.3 Flash price per million tokens
| GLM-5.3 Flash price per million tokens | USD |
|---|---|
| Input | $0.15 |
| Cached input | $0.03 |
| Output | $0.50 |
| Blended, 3 parts input to 1 part output | $0.2375 |
| Context window | Not listed |
GLM (Z.ai) lists one flat rate for GLM-5.3 Flash: no long-prompt surcharge or tier is shown on the pricing page we checked.
What GLM-5.3 Flash 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 Flash | Hunyuan Hy3 |
|---|---|---|---|
| Light: a side project or personal assistant | 2M in, 0.5M out | $0.55 | $0.53 |
| Medium: a small team or one product feature | 20M in, 5M out | $5.50 | $5.28 |
| Heavy: a production app | 200M in, 50M out | $55.00 | $52.80 |
| Medium with 80% of input cached | 20M in (16M cached), 5M out | $3.58 | $3.70 |
How GLM-5.3 Flash ranks on LMArena
Relative score: 100 is the top model we price on that board. Rank is among the models in our price table, not the full leaderboard.
| Board | Rank | Score /100 |
|---|---|---|
| Coding (Code Arena) | #21 of 50 | 25 |
| Chat (Text Arena) | #17 of 51 | 17 |
| Creative writing (Text Arena creative writing) | #25 of 51 | 0 |
| Roleplay and characters (Text Arena multi-turn) | #18 of 51 | 0 |
| Reasoning and math (Text Arena math) | #10 of 51 | 49 |
| Vision (Vision Arena) | #12 of 33 | 36 |
| Cheap bulk and agents (Agent Arena) | #25 of 34 | 39 |
Closest rivals to GLM-5.3 Flash
The models nearest in price, other makers first. Ranks are on Code Arena, where we have them.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| Hunyuan Hy3 | $0.132 / $0.528 | $0.231 | GLM-5.3 Flash wins: same price, higher score. Compare |
| Qwen3.8 Flash | $0.15 / $0.47 | $0.23 | Qwen3.8 Flash wins on price. Compare |
| Mistral Small 4 | $0.15 / $0.60 | $0.2625 | GLM-5.3 Flash wins on price. Compare |
| MiniMax-M3.1 Flash | $0.15 / $0.60 | $0.2625 | GLM-5.3 Flash wins on both. Compare |
Cheaper alternatives to GLM-5.3 Flash
Nothing in our table is at least 40% cheaper blended. See the cheapest LLM API ranking for the low end.
More from GLM (Z.ai)
- GLM-5.3 FlashX$0.37 in, $1.25 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 Flash API cost per million tokens?
$0.15 per 1M input tokens and $0.50 per 1M output tokens, plus $0.03 per 1M for cached input, as of Oct 29, 2026. A typical 3 to 1 input to output mix works out to $0.2375 per 1M tokens.
Does GLM-5.3 Flash charge more for long prompts?
No. GLM (Z.ai) lists a single rate on its pricing page.
Is GLM-5.3 Flash cheaper than Hunyuan Hy3?
No. A medium month (20M input and 5M output tokens) costs $5.50 on GLM-5.3 Flash and $5.28 on Hunyuan Hy3 at list price. On Code Arena, GLM-5.3 Flash ranks #21 and Hunyuan Hy3 #33.
How does GLM-5.3 Flash rank on LMArena?
On Code Arena it is #21 of 50 models we price, with a relative score of 25 out of 100. It ranks on 7 of 8 boards we track.
What is a cheaper alternative to GLM-5.3 Flash?
Few models undercut it by much. The next closest in price is Hunyuan Hy3 at $0.231 blended.
Where does this GLM-5.3 Flash price come from?
From GLM (Z.ai)'s official pricing page, which we check every day. This page was last checked Oct 29, 2026.