GLM 4.5 Air vs Beam 1.0 501B A23B
GLM 4.5 Air and Beam 1.0 501B A23B cost about the same per output token ($1.10 vs $1.10 per million). Updated October 22, 2026; 25 benchmarks have a result for both.
GLM 4.5 Air or Beam 1.0 501B A23B: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick GLM 4.5 Air for work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.
- Shared results
- 25
- GLM 4.5 Air only
- 23
- Beam 1.0 501B A23B only
- 3
- Like-for-like categories
- 6 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only GLM 4.5 Air has a AA Intelligence Index result, 11.1.
Directional only
Web design
Design Arena: websites
Beam 1.0 501B A23B
Beam 1.0 501B A23B leads, 1250 against 1146.
Same board, both measured
Long documents
Listed context window
Beam 1.0 501B A23B
Beam 1.0 501B A23B takes 1.05M tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GLM 4.5 Air
GLM 4.5 Air $0.0008, Beam 1.0 501B A23B $0.0009 per turn.
List prices
At a glance
- Coding index
- GLM 4.5 Air not benchmarked, Beam 1.0 501B A23B not benchmarked.
- Widest category
- Web design, 14.6 points apart on average over 2 shared benchmarks.
- Widest single gap
- Design Arena: game dev: GLM 4.5 Air 1094 against Beam 1.0 501B A23B 1224, 16.3 points apart on a 0 to 100 scale.
- Output price
- Both cost $1.10 per million output tokens.
- Context window
- GLM 4.5 Air takes 131K tokens, Beam 1.0 501B A23B 1.05M.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | GLM 4.5 Air | Bars | Beam 1.0 501B A23B | Ties |
|---|---|---|---|---|
| Coding | 0 | 2 | ||
| Reasoning | 0 | 3 | ||
| Math | 0 | 2 | ||
| Knowledge | 1 | 3 | ||
| Web design | 0 | 2 | ||
| General | 1 | 11 | ||
| All shared boards | 2 | 23 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index02
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| LMArena WebDev | Not measured | 1437 | Only Beam 1.0 501B A23B measured |
| LiveCodeBench (Artificial Analysis run) | 68.4% | Not measured | Only GLM 4.5 Air measured |
| Terminal-Bench Hard (Artificial Analysis run) | 20.5% | Not measured | Only GLM 4.5 Air measured |
| GSO-Bench | 2.9% | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: coding | 1397 | 1473 | Beam 1.0 501B A23B |
| LMArena Text: software and IT | 1401 | 1461 | Beam 1.0 501B A23B |
| LMArena WebDev: React | Not measured | 1443 | Only Beam 1.0 501B A23B measured |
| LMArena WebDev: HTML | Not measured | 1436 | Only Beam 1.0 501B A23B measured |
| Neither model has a result on the other 31 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| AA Intelligence Index | 11.1 | Not measured | Only GLM 4.5 Air measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| τ²-Bench Telecom | 46.5% | Not measured | Only GLM 4.5 Air measured |
| Neither model has a result on the other 40 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index03
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | 73.3% | Not measured | Only GLM 4.5 Air measured |
| Humanity's Last Exam (Artificial Analysis run) | 7.0% | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: hard prompts | 1379 | 1442 | Beam 1.0 501B A23B |
| LMArena Text: expert | 1370 | 1447 | Beam 1.0 501B A23B |
| LMArena Text: hard prompts in English | 1388 | 1451 | Beam 1.0 501B A23B |
| Kagi LLM Benchmark | 43.0% | Not measured | Only GLM 4.5 Air measured |
| Neither model has a result on the other 16 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| AA Math Index | 80.7 | Not measured | Only GLM 4.5 Air measured |
| AIME 2025 (Artificial Analysis run) | 80.7% | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: math | 1396 | 1459 | Beam 1.0 501B A23B |
| LMArena Text: mathematical work | 1396 | 1475 | Beam 1.0 501B A23B |
| Neither model has a result on the other 9 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| MMLU Pro (Artificial Analysis run) | 81.5% | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: science | 1407 | 1430 | Beam 1.0 501B A23B |
| LMArena Text: medicine and healthcare | 1402 | 1376 | GLM 4.5 Air |
| LMArena Text: legal and government | 1382 | 1433 | Beam 1.0 501B A23B |
| LMArena Text: business and finance | 1371 | 1430 | Beam 1.0 501B A23B |
| Neither model has a result on the other 13 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| Design Arena: websites | 1146 | 1250 | Beam 1.0 501B A23B |
| Design Arena: UI components | 1120 | Not measured | Only GLM 4.5 Air measured |
| Design Arena: game dev | 1094 | 1224 | Beam 1.0 501B A23B |
| Design Arena: data viz | 1186 | Not measured | Only GLM 4.5 Air measured |
| Design Arena: 3D | 1122 | Not measured | Only GLM 4.5 Air measured |
| Design Arena: all code categories | 1137 | Not measured | Only GLM 4.5 Air measured |
| Design Arena: SVG | 1071 | Not measured | Only GLM 4.5 Air measured |
| Neither model has a result on the other 2 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index111
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| IFBench | 37.6% | Not measured | Only GLM 4.5 Air measured |
| Long context reasoning (AA-LCR) | 46.7% | Not measured | Only GLM 4.5 Air measured |
| LMArena Text | 1384 | 1425 | Beam 1.0 501B A23B |
| LMArena Text: instruction following | 1354 | 1430 | Beam 1.0 501B A23B |
| LMArena Text: creative writing | 1343 | 1390 | Beam 1.0 501B A23B |
| LMArena Text: English | 1397 | 1436 | Beam 1.0 501B A23B |
| LMArena Text: non-English | 1366 | 1413 | Beam 1.0 501B A23B |
| LMArena Text: Chinese | 1426 | 1424 | GLM 4.5 Air |
| LMArena Text: German | 1377 | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: Japanese | 1348 | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: Korean | 1308 | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: French | 1400 | 1461 | Beam 1.0 501B A23B |
| LMArena Text: Spanish | 1385 | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: Russian | 1373 | 1412 | Beam 1.0 501B A23B |
| LMArena Text: Polish | 1368 | Not measured | Only GLM 4.5 Air measured |
| LMArena Text: multi-turn | 1371 | 1414 | Beam 1.0 501B A23B |
| LMArena Text: longer queries | 1366 | 1429 | Beam 1.0 501B A23B |
| LMArena Text: writing and language | 1354 | 1400 | Beam 1.0 501B A23B |
| LMArena Text: entertainment and media | 1339 | 1399 | Beam 1.0 501B A23B |
| Neither model has a result on the other 27 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | GLM 4.5 Air | Beam 1.0 501B A23B | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
GLM 4.5 Air costs less
Repository review
50K input + 3K output tokens
GLM 4.5 Air costs less
Agent loop
200K input + 10K output tokens
GLM 4.5 Air costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Z.ai GLM 4.5 Air | Reflection Beam 1.0 501B A23B |
|---|---|---|
| Maker | Z.ai | Reflection |
| Weights | Open weights | Open weights |
| Released | July 25, 2025 | October 16, 2026 |
| Context window | 131K | 1.05M |
| Input $/Mtok | $0.20 | $0.35 |
| Output $/Mtok | $1.10 | $1.10 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 1 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is GLM 4.5 Air better than Beam 1.0 501B A23B for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GLM 4.5 Air for work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.
Which is cheaper, GLM 4.5 Air or Beam 1.0 501B A23B?
GLM 4.5 Air costs $0.20 per million input tokens and $1.10 per million output tokens; Beam 1.0 501B A23B costs $0.35 and $1.10. Cost per solved task is known for neither of them.
Which has the bigger context window, GLM 4.5 Air or Beam 1.0 501B A23B?
Beam 1.0 501B A23B, with 1.05M tokens against 131K.
How many benchmarks is the GLM 4.5 Air vs Beam 1.0 501B A23B comparison based on?
25 benchmarks have a result for both models as of October 22, 2026. GLM 4.5 Air's coding index rests on 0 independent benchmarks and Beam 1.0 501B A23B's on 1. Where only one model has a result, the page says so instead of naming a winner.