Gemini 3.1 Pro Preview Custom Tools vs GLM 4.6
GLM 4.6 costs 5.5x less per output token than Gemini 3.1 Pro Preview Custom Tools ($2.20 vs $12.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $12.00
- Coding
- 8.8
- Overall
- 18.5
- Output $/M
- $2.20
Gemini 3.1 Pro Preview Custom Tools or GLM 4.6: which to pick
Only GLM 4.6 has a coding score, 8.8 on the Vibe Coding Index; Gemini 3.1 Pro Preview Custom Tools has none, so the two cannot be ranked on coding.
Pick Gemini 3.1 Pro Preview Custom Tools for a larger context window (1.05M against 205K tokens).
No benchmark has tested both yet. Gemini 3.1 Pro Preview Custom Tools has results on Vending-Bench 2; GLM 4.6 on SWE-bench Verified, LMArena WebDev and AA Coding Index. 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
Only GLM 4.6 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
No call
Only GLM 4.6 has a AA Intelligence Index result, 18.5.
Directional only
Reasoning
GPQA Diamond
No call
Only GLM 4.6 has a GPQA Diamond result, 74.5%.
Directional only
Math
AIME
No call
Only GLM 4.6 has a AIME result, 92.7%.
Directional only
Knowledge
MMLU Pro
No call
Only GLM 4.6 has a MMLU Pro result, 82.2%.
Directional only
Web design
Design Arena: websites
No call
Only GLM 4.6 has a Design Arena: websites result, 1174.
Directional only
Long documents
Listed context window
Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools takes 1.05M tokens against 205K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GLM 4.6
Gemini 3.1 Pro Preview Custom Tools $0.0080, GLM 4.6 $0.0017 per turn.
List prices
At a glance
- Coding index
- Gemini 3.1 Pro Preview Custom Tools not benchmarked, GLM 4.6 8.8 from 2 benchmarks.
- 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
- Gemini 3.1 Pro Preview Custom Tools $12.00 against GLM 4.6 $2.20 per million output tokens, 5.5x apart.
- Context window
- Gemini 3.1 Pro Preview Custom Tools takes 1.05M tokens, GLM 4.6 205K.
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 Index12 boards measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| SWE-bench Verified | Not measured | 68.2% | Only GLM 4.6 measured |
| LMArena WebDev | Not measured | 1341 | Only GLM 4.6 measured |
| AA Coding Index | Not measured | 45.8 | Only GLM 4.6 measured |
| LiveCodeBench (Vals AI) | Not measured | 81.0% | Only GLM 4.6 measured |
| Vibe Code Bench (Vals AI) | Not measured | 3.1% | Only GLM 4.6 measured |
| LiveCodeBench (Artificial Analysis run) | Not measured | 69.5% | Only GLM 4.6 measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 28.8% | Only GLM 4.6 measured |
| Terminal-Bench | Not measured | 24.5% | Only GLM 4.6 measured |
| ALE-Bench | Not measured | 340.8 | Only GLM 4.6 measured |
| LMArena Text: coding | Not measured | 1449 | Only GLM 4.6 measured |
| LMArena Text: software and IT | Not measured | 1455 | Only GLM 4.6 measured |
| LMArena WebDev: HTML | Not measured | 1350 | Only GLM 4.6 measured |
| Neither model has a result on the other 26 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 18.5 | Only GLM 4.6 measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| Design Arena: agents building full-stack apps | Not measured | 1029 | Only GLM 4.6 measured |
| Design Arena: agents building mobile apps | Not measured | 1096 | Only GLM 4.6 measured |
| Design Arena: agents building Android apps | Not measured | 1084 | Only GLM 4.6 measured |
| Design Arena: agents building Godot games | Not measured | 1180 | Only GLM 4.6 measured |
| τ²-Bench Telecom | Not measured | 76.9% | Only GLM 4.6 measured |
| Vending-Bench 2 | $3,774 | Not measured | Only Gemini 3.1 Pro Preview Custom Tools measured |
| Neither model has a result on the other 33 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 74.5% | Only GLM 4.6 measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 78.0% | Only GLM 4.6 measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 14.5% | Only GLM 4.6 measured |
| LMArena Text: hard prompts | Not measured | 1440 | Only GLM 4.6 measured |
| LMArena Text: expert | Not measured | 1432 | Only GLM 4.6 measured |
| LMArena Text: hard prompts in English | Not measured | 1445 | Only GLM 4.6 measured |
| Neither model has a result on the other 15 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| AIME | Not measured | 92.7% | Only GLM 4.6 measured |
| MGSM (Vals AI) | Not measured | 89.8% | Only GLM 4.6 measured |
| AA Math Index | Not measured | 86.0 | Only GLM 4.6 measured |
| AIME 2025 (Artificial Analysis run) | Not measured | 86.0% | Only GLM 4.6 measured |
| LMArena Text: math | Not measured | 1432 | Only GLM 4.6 measured |
| LMArena Text: mathematical work | Not measured | 1447 | Only GLM 4.6 measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index10 boards measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 82.2% | Only GLM 4.6 measured |
| LegalBench (Vals AI) | Not measured | 79.6% | Only GLM 4.6 measured |
| CorpFin (Vals AI) | Not measured | 56.8% | Only GLM 4.6 measured |
| TaxEval (Vals AI) | Not measured | 66.2% | Only GLM 4.6 measured |
| MedQA (Vals AI) | Not measured | 92.2% | Only GLM 4.6 measured |
| MMLU Pro (Artificial Analysis run) | Not measured | 82.9% | Only GLM 4.6 measured |
| LMArena Text: science | Not measured | 1456 | Only GLM 4.6 measured |
| LMArena Text: medicine and healthcare | Not measured | 1455 | Only GLM 4.6 measured |
| LMArena Text: legal and government | Not measured | 1448 | Only GLM 4.6 measured |
| LMArena Text: business and finance | Not measured | 1416 | Only GLM 4.6 measured |
| Neither model has a result on the other 7 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index7 boards measured
| Benchmark | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1174 | Only GLM 4.6 measured |
| Design Arena: UI components | Not measured | 1148 | Only GLM 4.6 measured |
| Design Arena: game dev | Not measured | 1151 | Only GLM 4.6 measured |
| Design Arena: data viz | Not measured | 1161 | Only GLM 4.6 measured |
| Design Arena: 3D | Not measured | 1129 | Only GLM 4.6 measured |
| Design Arena: all code categories | Not measured | 1166 | Only GLM 4.6 measured |
| Design Arena: SVG | Not measured | 1109 | Only GLM 4.6 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 | Gemini 3.1 Pro Preview Custom Tools | GLM 4.6 | Leader |
|---|---|---|---|
| IFBench | Not measured | 43.4% | Only GLM 4.6 measured |
| Long context reasoning (AA-LCR) | Not measured | 54.0% | Only GLM 4.6 measured |
| LMArena Text | Not measured | 1440 | Only GLM 4.6 measured |
| LMArena Text: instruction following | Not measured | 1410 | Only GLM 4.6 measured |
| LMArena Text: creative writing | Not measured | 1412 | Only GLM 4.6 measured |
| LMArena Text: English | Not measured | 1449 | Only GLM 4.6 measured |
| LMArena Text: non-English | Not measured | 1426 | Only GLM 4.6 measured |
| LMArena Text: Chinese | Not measured | 1499 | Only GLM 4.6 measured |
| LMArena Text: German | Not measured | 1447 | Only GLM 4.6 measured |
| LMArena Text: Japanese | Not measured | 1393 | Only GLM 4.6 measured |
| LMArena Text: Korean | Not measured | 1400 | Only GLM 4.6 measured |
| LMArena Text: French | Not measured | 1459 | Only GLM 4.6 measured |
| LMArena Text: Spanish | Not measured | 1436 | Only GLM 4.6 measured |
| LMArena Text: Russian | Not measured | 1418 | Only GLM 4.6 measured |
| LMArena Text: Polish | Not measured | 1447 | Only GLM 4.6 measured |
| LMArena Text: multi-turn | Not measured | 1427 | Only GLM 4.6 measured |
| LMArena Text: longer queries | Not measured | 1422 | Only GLM 4.6 measured |
| LMArena Text: writing and language | Not measured | 1415 | Only GLM 4.6 measured |
| LMArena Text: entertainment and media | Not measured | 1409 | Only GLM 4.6 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 4.6 costs less
Repository review
50K input + 3K output tokens
GLM 4.6 costs less
Agent loop
200K input + 10K output tokens
GLM 4.6 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 | Google Gemini 3.1 Pro Preview Custom Tools | Z.ai GLM 4.6 |
|---|---|---|
| Maker | Z.ai | |
| Weights | No public weights listed | Open weights |
| Released | February 25, 2026 | September 30, 2025 |
| Context window | 1.05M | 205K |
| Input $/Mtok | $2.00 | $0.60 |
| Output $/Mtok | $12.00 | $2.20 |
| Coding index | Not benchmarked | 8.8 |
| Independent measurements behind it | 0 | 2 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Gemini 3.1 Pro Preview Custom Tools better than GLM 4.6 for coding?
Only GLM 4.6 has a coding score, 8.8 on the Vibe Coding Index; Gemini 3.1 Pro Preview Custom Tools has none, so the two cannot be ranked on coding. Pick Gemini 3.1 Pro Preview Custom Tools for a larger context window (1.05M against 205K tokens).
Which is cheaper, Gemini 3.1 Pro Preview Custom Tools or GLM 4.6?
Gemini 3.1 Pro Preview Custom Tools costs $2.00 per million input tokens and $12.00 per million output tokens; GLM 4.6 costs $0.60 and $2.20. Cost per solved task is known for neither of them.
Which has the bigger context window, Gemini 3.1 Pro Preview Custom Tools or GLM 4.6?
Gemini 3.1 Pro Preview Custom Tools, with 1.05M tokens against 205K.
Has any benchmark tested both Gemini 3.1 Pro Preview Custom Tools and GLM 4.6?
No benchmark has tested both yet. Gemini 3.1 Pro Preview Custom Tools has results on Vending-Bench 2; GLM 4.6 on SWE-bench Verified, LMArena WebDev and AA Coding Index. Compare them on price and context instead. Data as of October 21, 2026.