Ember-1 vs GLM 5
Ember-1 leads GLM 5 on coding, 52.6 to 41.7 on the Vibe Coding Index, and GLM 5 costs 4.7x less per output token ($3.20 vs $15.00 per million). Updated October 21, 2026; 1 benchmarks have a result for both.
Ember-1 or GLM 5: which to pick
Pick Ember-1 for coding: it scores 52.6 on the Vibe Coding Index against 41.7 for GLM 5, though on 2 benchmarks against 3.
Pick GLM 5 for output tokens 4.7x cheaper ($3.20 vs $15.00 per million).
- Shared results
- 1
- Ember-1 only
- 13
- GLM 5 only
- 75
- Like-for-like categories
- 1 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
Ember-1
Ember-1 scores 52.6 against 41.7.
2 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only GLM 5 has a AA Intelligence Index result, 27.9.
Directional only
Reasoning
GPQA Diamond
No call
Only GLM 5 has a GPQA Diamond result, 83.3%.
Directional only
Math
AIME
No call
Only GLM 5 has a AIME result, 91.7%.
Directional only
Knowledge
MMLU Pro
No call
Only GLM 5 has a MMLU Pro result, 86.0%.
Directional only
Web design
Design Arena: websites
No call
Only GLM 5 has a Design Arena: websites result, 1247.
Directional only
Long documents
Listed context window
Ember-1
Ember-1 takes 1.05M tokens against 205K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GLM 5
Ember-1 $0.011, GLM 5 $0.0026 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only GLM 5 has the number, $0.63.
Directional only
At a glance
- Coding index
- Ember-1 52.6 from 2 benchmarks, GLM 5 41.7 from 3 benchmarks.
- Widest category
- Coding, 60.5 points apart on average over 1 shared benchmark.
- Widest single gap
- Vibe Code Bench (Vals AI): Ember-1 83.9% against GLM 5 23.4%, 60.5 points apart on a 0 to 100 scale.
- Output price
- Ember-1 $15.00 against GLM 5 $3.20 per million output tokens, 4.7x apart.
- Context window
- Ember-1 takes 1.05M tokens, GLM 5 205K.
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 | Ember-1 | Bars | GLM 5 | Ties |
|---|---|---|---|---|
| Coding | 1 | 0 | ||
| All shared boards | 1 | 0 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index10
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| SWE-bench Verified | Not measured | 72.8% | Only GLM 5 measured |
| SWE-bench Multilingual | Not measured | 69.7% | Only GLM 5 measured |
| LMArena WebDev | Not measured | 1435 | Only GLM 5 measured |
| LiveCodeBench (Vals AI) | Not measured | 81.9% | Only GLM 5 measured |
| SWE-bench Verified (Vals AI) | Not measured | 71.4% | Only GLM 5 measured |
| Terminal-Bench 4 (Vals AI) | 20.7% | Not measured | Only Ember-1 measured |
| Vibe Code Bench (Vals AI) | 83.9% | 23.4% | Ember-1 |
| Code migration (Vals AI) | 32.5% | Not measured | Only Ember-1 measured |
| IOI (Vals AI) | 46.3% | Not measured | Only Ember-1 measured |
| CyberBench (Vals AI) | 69.5% | Not measured | Only Ember-1 measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 43.2% | Only GLM 5 measured |
| Terminal-Bench | Not measured | 52.4% | Only GLM 5 measured |
| WeirdML | Not measured | 48.2% | Only GLM 5 measured |
| ALE-Bench | Not measured | 765.6 | Only GLM 5 measured |
| LMArena Text: coding | Not measured | 1461 | Only GLM 5 measured |
| LMArena Text: software and IT | Not measured | 1460 | Only GLM 5 measured |
| LMArena WebDev: React | Not measured | 1424 | Only GLM 5 measured |
| LMArena WebDev: HTML | Not measured | 1450 | Only GLM 5 measured |
| Neither model has a result on the other 21 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 27.9 | Only GLM 5 measured |
| Epoch Capabilities Index | Not measured | 145.8 | Only GLM 5 measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index14 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| Design Arena: agents building full-stack apps | Not measured | 1123 | Only GLM 5 measured |
| Design Arena: agents building mobile apps | Not measured | 1136 | Only GLM 5 measured |
| Design Arena: agents building Android apps | Not measured | 1146 | Only GLM 5 measured |
| Design Arena: agents building Godot games | Not measured | 1144 | Only GLM 5 measured |
| Design Arena: HTML slides | Not measured | 1148 | Only GLM 5 measured |
| Finance Agent (Vals AI) | 51.8% | Not measured | Only Ember-1 measured |
| Tax Agent Bench (Vals AI) | 31.1% | Not measured | Only Ember-1 measured |
| Legal Research Bench (Vals AI) | 44.7% | Not measured | Only Ember-1 measured |
| Excel Modeling Benchmark (Vals AI) | 63.4% | Not measured | Only Ember-1 measured |
| BioMysteryBench (Vals AI) | 67.0% | Not measured | Only Ember-1 measured |
| Terminal-Bench-Science (Vals AI) | 5.7% | Not measured | Only Ember-1 measured |
| Vals Science Index | 31.8% | Not measured | Only Ember-1 measured |
| τ²-Bench Telecom | Not measured | 98.2% | Only GLM 5 measured |
| Vending-Bench 2 | Not measured | $4,432 | Only GLM 5 measured |
| Neither model has a result on the other 27 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index12 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 83.3% | Only GLM 5 measured |
| MysteryMechanism (Vals AI) | 22.5% | Not measured | Only Ember-1 measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 82.0% | Only GLM 5 measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 29.3% | Only GLM 5 measured |
| GPQA Diamond (Epoch AI run) | Not measured | 87.8% | Only GLM 5 measured |
| ARC-AGI | Not measured | 44.7% | Only GLM 5 measured |
| ARC-AGI-2 | Not measured | 4.9% | Only GLM 5 measured |
| SimpleBench | Not measured | 53.2% | Only GLM 5 measured |
| LMArena Text: hard prompts | Not measured | 1452 | Only GLM 5 measured |
| LMArena Text: expert | Not measured | 1454 | Only GLM 5 measured |
| LMArena Text: hard prompts in English | Not measured | 1460 | Only GLM 5 measured |
| Kagi LLM Benchmark | Not measured | 75.0% | Only GLM 5 measured |
| Neither model has a result on the other 10 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| AIME | Not measured | 91.7% | Only GLM 5 measured |
| OTIS Mock AIME | Not measured | 80.0% | Only GLM 5 measured |
| LMArena Text: math | Not measured | 1440 | Only GLM 5 measured |
| LMArena Text: mathematical work | Not measured | 1451 | Only GLM 5 measured |
| Neither model has a result on the other 9 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index10 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 86.0% | Only GLM 5 measured |
| LegalBench (Vals AI) | Not measured | 84.1% | Only GLM 5 measured |
| CaseLaw (Vals AI) | Not measured | 52.5% | Only GLM 5 measured |
| CorpFin (Vals AI) | Not measured | 62.9% | Only GLM 5 measured |
| TaxEval (Vals AI) | Not measured | 70.0% | Only GLM 5 measured |
| MedQA (Vals AI) | Not measured | 94.3% | Only GLM 5 measured |
| LMArena Text: science | Not measured | 1460 | Only GLM 5 measured |
| LMArena Text: medicine and healthcare | Not measured | 1455 | Only GLM 5 measured |
| LMArena Text: legal and government | Not measured | 1453 | Only GLM 5 measured |
| LMArena Text: business and finance | Not measured | 1430 | Only GLM 5 measured |
| Neither model has a result on the other 8 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1247 | Only GLM 5 measured |
| Design Arena: UI components | Not measured | 1230 | Only GLM 5 measured |
| Design Arena: game dev | Not measured | 1234 | Only GLM 5 measured |
| Design Arena: data viz | Not measured | 1228 | Only GLM 5 measured |
| Design Arena: 3D | Not measured | 1229 | Only GLM 5 measured |
| Design Arena: all code categories | Not measured | 1246 | Only GLM 5 measured |
| Design Arena: SVG | Not measured | 1168 | Only GLM 5 measured |
| Design Arena: ASCII art | Not measured | 1147 | Only GLM 5 measured |
| Neither model has a result on the other 1 board here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index21 boards, none shared
| Benchmark | Ember-1 | GLM 5 | Leader |
|---|---|---|---|
| Public Benefits Bench (Vals AI) | 66.2% | Not measured | Only Ember-1 measured |
| IFBench | Not measured | 72.3% | Only GLM 5 measured |
| Long context reasoning (AA-LCR) | Not measured | 75.7% | Only GLM 5 measured |
| CL-bench | Not measured | 18.7% | Only GLM 5 measured |
| LMArena Text | Not measured | 1446 | Only GLM 5 measured |
| LMArena Text: instruction following | Not measured | 1428 | Only GLM 5 measured |
| LMArena Text: creative writing | Not measured | 1438 | Only GLM 5 measured |
| LMArena Text: English | Not measured | 1458 | Only GLM 5 measured |
| LMArena Text: non-English | Not measured | 1430 | Only GLM 5 measured |
| LMArena Text: Chinese | Not measured | 1511 | Only GLM 5 measured |
| LMArena Text: German | Not measured | 1447 | Only GLM 5 measured |
| LMArena Text: Japanese | Not measured | 1416 | Only GLM 5 measured |
| LMArena Text: Korean | Not measured | 1423 | Only GLM 5 measured |
| LMArena Text: French | Not measured | 1456 | Only GLM 5 measured |
| LMArena Text: Spanish | Not measured | 1454 | Only GLM 5 measured |
| LMArena Text: Russian | Not measured | 1436 | Only GLM 5 measured |
| LMArena Text: Polish | Not measured | 1434 | Only GLM 5 measured |
| LMArena Text: multi-turn | Not measured | 1456 | Only GLM 5 measured |
| LMArena Text: longer queries | Not measured | 1446 | Only GLM 5 measured |
| LMArena Text: writing and language | Not measured | 1437 | Only GLM 5 measured |
| LMArena Text: entertainment and media | Not measured | 1426 | Only GLM 5 measured |
| Neither model has a result on the other 25 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Ember-1 | GLM 5 | 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 5 costs less
Repository review
50K input + 3K output tokens
GLM 5 costs less
Agent loop
200K input + 10K output tokens
GLM 5 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 | Fireworks Ember-1 | Z.ai GLM 5 |
|---|---|---|
| Maker | Fireworks | Z.ai |
| Weights | No public weights listed | Open weights |
| Released | September 24, 2026 | February 11, 2026 |
| Context window | 1.05M | 205K |
| Input $/Mtok | $3.00 | $1.00 |
| Output $/Mtok | $15.00 | $3.20 |
| Coding index | 52.6 | 41.7 |
| Independent measurements behind it | 2 | 3 |
| Cost per solved task | Not computable | $0.63 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Ember-1 better than GLM 5 for coding?
Pick Ember-1 for coding: it scores 52.6 on the Vibe Coding Index against 41.7 for GLM 5, though on 2 benchmarks against 3. Pick GLM 5 for output tokens 4.7x cheaper ($3.20 vs $15.00 per million).
Which is cheaper, Ember-1 or GLM 5?
Ember-1 costs $3.00 per million input tokens and $15.00 per million output tokens; GLM 5 costs $1.00 and $3.20. Cost per solved task is known for GLM 5 only.
Which has the bigger context window, Ember-1 or GLM 5?
Ember-1, with 1.05M tokens against 205K.
How many benchmarks is the Ember-1 vs GLM 5 comparison based on?
1 benchmarks have a result for both models as of October 21, 2026. Ember-1's coding index rests on 2 independent benchmarks and GLM 5's on 3. Where only one model has a result, the page says so instead of naming a winner.