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Step 5 Preview
GLM-4.5-Air
GLM-4.5-Air is an open-weight model from Z.ai, released Jul 25, 2025. It ranks #173 of 351 on the LMArena text leaderboard with a rating of 1384. It costs $0.13 per million input tokens and $0.85 per million output tokens, with a 128K-token context window.
- Developer
- Z.ai (Zhipu AI)
- Released
- Jul 25, 2025
- Context window
- 128K
- Price in / out, per 1M tokens
- $0.13 / $0.85
- Weights
- Open · MIT
- Inputs
- Text
- Reasoning
- Yes
- Tool use
- Yes
- Hugging Face downloads, 30 days
- 943.3K
- Hugging Face likes
- 647
The rating LMArena published at each update since Aug 4, 2025. Ratings move as votes come in and new models join.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1384 | 173 / 351 | 30.6K |
| CodingLMArena | 1397 | 179 / 346 | 6.1K |
| MathLMArena | 1396 | 171 / 339 | 1.5K |
| Creative writingLMArena | 1343 | 178 / 349 | 4K |
| Instruction followingLMArena | 1354 | 185 / 351 | 8.2K |
| Hard promptsLMArena | 1379 | 179 / 351 | 14.9K |
| Multi-turnLMArena | 1371 | 181 / 349 | 5K |
| Long queriesLMArena | 1366 | 184 / 330 | 6.8K |
| ExpertLMArena | 1370 | 181 / 305 | 1.5K |
| Legal and governmentIndustries | 1382 | 178 / 325 | 1.9K |
| Medicine and healthcareIndustries | 1401 | 157 / 325 | 1.6K |
| Business and financeIndustries | 1370 | 176 / 344 | 5.5K |
| ChineseLanguages | 1426 | 157 / 328 | 2.2K |
| SpanishLanguages | 1386 | 164 / 249 | 824 |
| GermanLanguages | 1378 | 146 / 261 | 744 |
| FrenchLanguages | 1400 | 156 / 252 | 520 |
| JapaneseLanguages | 1348 | 130 / 236 | 846 |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare GLM-4.5-Air
Z.ai (Zhipu AI)
A Tsinghua spin-out that builds the GLM family of open bilingual models. Founded 2019, based in Beijing. z.ai
Questions
Who makes GLM-4.5-Air?
GLM-4.5-Air is made by Z.ai (Zhipu AI), founded 2019 and based in Beijing.
How much does GLM-4.5-Air cost?
$0.13 per million input tokens and $0.85 per million output tokens, at its provider’s list price.
What is GLM-4.5-Air’s context window?
128K tokens (131,072).
How does GLM-4.5-Air rank?
#173 of 351 on LMArena’s text leaderboard, rated 1384 (95% interval 1380–1388) from 30,646 votes, as of Oct 22, 2026.
Is GLM-4.5-Air open source?
GLM-4.5-Air has open weights under the MIT license, downloadable from Hugging Face (zai-org/GLM-4.5-Air).