Seed-2.0-Code vs GLM 4.5 Air
GLM 4.5 Air costs 2.7x less per output token than Seed-2.0-Code ($1.10 vs $3.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $3.00
- Coding
- No data
- Overall
- No data
- Output $/M
- $1.10
Seed-2.0-Code or GLM 4.5 Air: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Seed-2.0-Code for a larger context window (262K against 131K tokens).
No benchmark has tested both yet. Seed-2.0-Code has none yet; GLM 4.5 Air on LiveCodeBench (Artificial Analysis run), Terminal-Bench Hard (Artificial Analysis run) and GSO-Bench. Compare them on price and context instead.
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
No call
Only GLM 4.5 Air has a Design Arena: websites result, 1146.
Directional only
Long documents
Listed context window
Seed-2.0-Code
Seed-2.0-Code takes 262K tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GLM 4.5 Air
Seed-2.0-Code $0.0020, GLM 4.5 Air $0.0008 per turn.
List prices
At a glance
- Coding index
- Seed-2.0-Code not benchmarked, GLM 4.5 Air not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- Seed-2.0-Code $3.00 against GLM 4.5 Air $1.10 per million output tokens, 2.7x apart.
- Context window
- Seed-2.0-Code takes 262K tokens, GLM 4.5 Air 131K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index5 boards measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| LiveCodeBench (Artificial Analysis run) | Not measured | 68.4% | Only GLM 4.5 Air measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 20.5% | Only GLM 4.5 Air measured |
| GSO-Bench | Not measured | 2.9% | Only GLM 4.5 Air measured |
| LMArena Text: coding | Not measured | 1397 | Only GLM 4.5 Air measured |
| LMArena Text: software and IT | Not measured | 1401 | Only GLM 4.5 Air measured |
| Neither model has a result on the other 34 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 11.1 | 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 measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| τ²-Bench Telecom | Not measured | 46.5% | Only GLM 4.5 Air measured |
| Neither model has a result on the other 40 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | Not measured | 73.3% | Only GLM 4.5 Air measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 7.0% | Only GLM 4.5 Air measured |
| LMArena Text: hard prompts | Not measured | 1379 | Only GLM 4.5 Air measured |
| LMArena Text: expert | Not measured | 1370 | Only GLM 4.5 Air measured |
| LMArena Text: hard prompts in English | Not measured | 1388 | Only GLM 4.5 Air measured |
| Kagi LLM Benchmark | Not measured | 43.0% | Only GLM 4.5 Air measured |
| Neither model has a result on the other 16 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index4 boards measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| AA Math Index | Not measured | 80.7 | Only GLM 4.5 Air measured |
| AIME 2025 (Artificial Analysis run) | Not measured | 80.7% | Only GLM 4.5 Air measured |
| LMArena Text: math | Not measured | 1396 | Only GLM 4.5 Air measured |
| LMArena Text: mathematical work | Not measured | 1396 | Only GLM 4.5 Air measured |
| Neither model has a result on the other 9 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index5 boards measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| MMLU Pro (Artificial Analysis run) | Not measured | 81.5% | Only GLM 4.5 Air measured |
| LMArena Text: science | Not measured | 1407 | Only GLM 4.5 Air measured |
| LMArena Text: medicine and healthcare | Not measured | 1402 | Only GLM 4.5 Air measured |
| LMArena Text: legal and government | Not measured | 1382 | Only GLM 4.5 Air measured |
| LMArena Text: business and finance | Not measured | 1371 | Only GLM 4.5 Air measured |
| Neither model has a result on the other 13 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index7 boards measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1146 | Only GLM 4.5 Air measured |
| Design Arena: UI components | Not measured | 1123 | Only GLM 4.5 Air measured |
| Design Arena: game dev | Not measured | 1094 | Only GLM 4.5 Air measured |
| Design Arena: data viz | Not measured | 1186 | Only GLM 4.5 Air measured |
| Design Arena: 3D | Not measured | 1123 | Only GLM 4.5 Air measured |
| Design Arena: all code categories | Not measured | 1137 | Only GLM 4.5 Air measured |
| Design Arena: SVG | Not measured | 1071 | Only GLM 4.5 Air measured |
| Neither model has a result on the other 2 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index19 boards measured
| Benchmark | Seed-2.0-Code | GLM 4.5 Air | Leader |
|---|---|---|---|
| IFBench | Not measured | 37.6% | Only GLM 4.5 Air measured |
| Long context reasoning (AA-LCR) | Not measured | 46.7% | Only GLM 4.5 Air measured |
| LMArena Text | Not measured | 1384 | Only GLM 4.5 Air measured |
| LMArena Text: instruction following | Not measured | 1354 | Only GLM 4.5 Air measured |
| LMArena Text: creative writing | Not measured | 1343 | Only GLM 4.5 Air measured |
| LMArena Text: English | Not measured | 1397 | Only GLM 4.5 Air measured |
| LMArena Text: non-English | Not measured | 1366 | Only GLM 4.5 Air measured |
| LMArena Text: Chinese | Not measured | 1426 | Only GLM 4.5 Air measured |
| LMArena Text: German | Not measured | 1377 | Only GLM 4.5 Air measured |
| LMArena Text: Japanese | Not measured | 1348 | Only GLM 4.5 Air measured |
| LMArena Text: Korean | Not measured | 1308 | Only GLM 4.5 Air measured |
| LMArena Text: French | Not measured | 1400 | Only GLM 4.5 Air measured |
| LMArena Text: Spanish | Not measured | 1385 | Only GLM 4.5 Air measured |
| LMArena Text: Russian | Not measured | 1373 | Only GLM 4.5 Air measured |
| LMArena Text: Polish | Not measured | 1368 | Only GLM 4.5 Air measured |
| LMArena Text: multi-turn | Not measured | 1371 | Only GLM 4.5 Air measured |
| LMArena Text: longer queries | Not measured | 1366 | Only GLM 4.5 Air measured |
| LMArena Text: writing and language | Not measured | 1354 | Only GLM 4.5 Air measured |
| LMArena Text: entertainment and media | Not measured | 1339 | Only GLM 4.5 Air measured |
| Neither model has a result on the other 27 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 | ByteDance Seed Seed-2.0-Code | Z.ai GLM 4.5 Air |
|---|---|---|
| Maker | ByteDance Seed | Z.ai |
| Weights | No public weights listed | Open weights |
| Released | August 12, 2026 | July 25, 2025 |
| Context window | 262K | 131K |
| Input $/Mtok | $0.50 | $0.20 |
| Output $/Mtok | $3.00 | $1.10 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Seed-2.0-Code better than GLM 4.5 Air for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Seed-2.0-Code for a larger context window (262K against 131K tokens).
Which is cheaper, Seed-2.0-Code or GLM 4.5 Air?
Seed-2.0-Code costs $0.50 per million input tokens and $3.00 per million output tokens; GLM 4.5 Air costs $0.20 and $1.10. Cost per solved task is known for neither of them.
Which has the bigger context window, Seed-2.0-Code or GLM 4.5 Air?
Seed-2.0-Code, with 262K tokens against 131K.
Has any benchmark tested both Seed-2.0-Code and GLM 4.5 Air?
No benchmark has tested both yet. Seed-2.0-Code has none yet; GLM 4.5 Air on LiveCodeBench (Artificial Analysis run), Terminal-Bench Hard (Artificial Analysis run) and GSO-Bench. Compare them on price and context instead. Data as of October 21, 2026.