Gemini 4 Argon vs Grok 4.5
Updated October 21, 2026. 77 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Gemini 4 Argon for coding: it scores 80.5 on the Vibe Coding Index against 75.5 for Grok 4.5.
Pick Grok 4.5 when output tokens cost 1.7x less, or when what matters is LiveBench coding or Terminal-Bench 2.1 (Vals AI), where it leads.
- Shared results
- 77
- Gemini 4 Argon only
- 15
- Grok 4.5 only
- 43
- Like-for-like categories
- 8 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
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, four public coding benchmarks
Gemini 4 Argon
Gemini 4 Argon scores 80.5 against 75.5.
2 benchmarks behind each score
Intelligence
AA Intelligence Index
Gemini 4 Argon
Gemini 4 Argon leads, 52.6 against 38.8.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Grok 4.5 has a AA Agentic Index result, 41.2.
Directional only
Reasoning
GPQA Diamond
No call
Only Grok 4.5 has a GPQA Diamond result, 92.9%.
Directional only
Knowledge
MMLU Pro
No call
Only Grok 4.5 has a MMLU Pro result, 89.2%.
Directional only
Web design
Design Arena: websites
Gemini 4 Argon
Gemini 4 Argon leads, 1315 against 1281.
Same board, both measured
General
Vals Index
No call
Only Gemini 4 Argon has a Vals Index result, 69.2%.
Directional only
Long documents
Listed context window
Gemini 4 Argon
Gemini 4 Argon takes 1.05M tokens against 500K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Grok 4.5
Gemini 4 Argon $0.0070, Grok 4.5 $0.0050 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Grok 4.5 has the number, $0.62.
Directional only
At a glance
- Coding index
- Gemini 4 Argon 80.5 from 2 benchmarks, Grok 4.5 75.5 from 2 benchmarks.
- Widest category
- Agentic work, 31.5 points apart on average over 11 shared benchmarks.
- Widest single gap
- ProofBench: Gemini 4 Argon 99.0% against Grok 4.5 31.0%, 68.0 points apart on a 0 to 100 scale.
- Output price
- Gemini 4 Argon $10.00 against Grok 4.5 $6.00 per million output tokens, 1.7x apart.
- Context window
- Gemini 4 Argon takes 1.05M tokens, Grok 4.5 500K.
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 | Gemini 4 Argon | Bars | Grok 4.5 | Ties |
|---|---|---|---|---|
| Coding | 14 | 2 | ||
| Intelligence | 2 | 0 | ||
| Agentic work | 10 | 1 | ||
| Reasoning | 9 | 0 | ||
| Math | 6 | 0 | ||
| Knowledge | 7 | 0 | ||
| Web design | 6 | 1 | ||
| General | 19 | 0 | ||
| All shared boards | 73 | 4 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index142
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| LiveBench coding | 89.7% | 94.3% | Grok 4.5 |
| LMArena WebDev | 1678 | 1553 | Gemini 4 Argon |
| AA Coding Index | Not measured | 72.4 | Only Grok 4.5 measured |
| LiveCodeBench (Vals AI) | Not measured | 87.3% | Only Grok 4.5 measured |
| SWE-bench Verified (Vals AI) | Not measured | 86.6% | Only Grok 4.5 measured |
| Terminal-Bench 4 (Vals AI) | 57.6% | 8.6% | Gemini 4 Argon |
| Vibe Code Bench (Vals AI) | 91.9% | 69.0% | Gemini 4 Argon |
| Code migration (Vals AI) | 68.2% | 36.6% | Gemini 4 Argon |
| ProgramBench (Vals AI) | 2.5% | 0.0% | Gemini 4 Argon |
| IOI (Vals AI) | 100.0% | 40.6% | Gemini 4 Argon |
| Terminal-Bench 2.1 (Vals AI) | 57.7% | 67.8% | Grok 4.5 |
| SWE-bench Multimodal (Vals AI) | 56.0% | Not measured | Only Gemini 4 Argon measured |
| Vibe Code Bench 1-100 (Vals AI) | 21.2% | Not measured | Only Gemini 4 Argon measured |
| SkillsBench (Vals AI) | Not measured | 66.0% | Only Grok 4.5 measured |
| CyberBench (Vals AI) | 77.9% | 71.0% | Gemini 4 Argon |
| SciCode | 61.8% | 55.0% | Gemini 4 Argon |
| FrontierCode | 47.5% | 42.4% | Gemini 4 Argon |
| FrontierSWE | 55.0% | Not measured | Only Gemini 4 Argon measured |
| WeirdML | Not measured | 46.4% | Only Grok 4.5 measured |
| ALE-Bench | 2100.1 | 1309.3 | Gemini 4 Argon |
| LMArena Text: coding | 1546 | 1474 | Gemini 4 Argon |
| LMArena Text: software and IT | 1556 | 1471 | Gemini 4 Argon |
| LMArena WebDev: React | 1692 | 1556 | Gemini 4 Argon |
| LMArena WebDev: HTML | 1643 | 1567 | Gemini 4 Argon |
| LMArena WebDev: from an image | Not measured | 1562 | Only Grok 4.5 measured |
| Neither model has a result on the other 13 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| AA Intelligence Index | 52.6 | 38.8 | Gemini 4 Argon |
| Epoch Capabilities Index | 166.4 | 154.1 | Gemini 4 Argon |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index101
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 41.2 | Only Grok 4.5 measured |
| Design Arena: agents building web apps | Not measured | 1217 | Only Grok 4.5 measured |
| Design Arena: agents building full-stack apps | Not measured | 1249 | Only Grok 4.5 measured |
| Design Arena: agents building mobile apps | Not measured | 1221 | Only Grok 4.5 measured |
| Design Arena: agents building Android apps | Not measured | 1242 | Only Grok 4.5 measured |
| Design Arena: agents building Godot games | Not measured | 1229 | Only Grok 4.5 measured |
| Design Arena: agents building games | Not measured | 1235 | Only Grok 4.5 measured |
| Design Arena: HTML slides | Not measured | 1204 | Only Grok 4.5 measured |
| Design Arena: PowerPoint slides | Not measured | 1232 | Only Grok 4.5 measured |
| Design Arena: spreadsheets | 1151 | Not measured | Only Gemini 4 Argon measured |
| LiveBench research | 83.1% | 85.9% | Grok 4.5 |
| LiveBench browser | 92.0% | 44.0% | Gemini 4 Argon |
| LiveBench long agentic | 69.9% | 27.9% | Gemini 4 Argon |
| SREBench (Vals AI) | 44.3% | 0.8% | Gemini 4 Argon |
| Finance Agent (Vals AI) | 65.4% | 48.4% | Gemini 4 Argon |
| Tax Agent Bench (Vals AI) | 44.6% | 24.9% | Gemini 4 Argon |
| Legal Research Bench (Vals AI) | 54.8% | 38.0% | Gemini 4 Argon |
| Harvey's Legal Agent Benchmark (Vals AI) | 27.1% | Not measured | Only Gemini 4 Argon measured |
| Excel Modeling Benchmark (Vals AI) | 75.2% | 52.9% | Gemini 4 Argon |
| BioMysteryBench (Vals AI) | 76.3% | Not measured | Only Gemini 4 Argon measured |
| Terminal-Bench-Science (Vals AI) | 44.3% | Not measured | Only Gemini 4 Argon measured |
| Vals Science Index | 55.4% | Not measured | Only Gemini 4 Argon measured |
| Time Horizon Index (Vals AI) | 52.5% | 6.3% | Gemini 4 Argon |
| CUA-bench (Vals AI) | 4.8% | Not measured | Only Gemini 4 Argon measured |
| Robo-bench (Vals AI) | 0.8% | Not measured | Only Gemini 4 Argon measured |
| APEX-Agents | 82.4% | 56.2% | Gemini 4 Argon |
| PostTrainBench | Not measured | 23.4% | Only Grok 4.5 measured |
| Vending-Bench 2 | $13,718 | $3,887 | Gemini 4 Argon |
| LMArena Search | Not measured | 1216 | Only Grok 4.5 measured |
| Neither model has a result on the other 10 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index90
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 92.9% | Only Grok 4.5 measured |
| LiveBench reasoning | 95.1% | 87.2% | Gemini 4 Argon |
| MysteryMechanism (Vals AI) | 45.5% | Not measured | Only Gemini 4 Argon measured |
| MMMU Pro (Vals AI) | Not measured | 61.8% | Only Grok 4.5 measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 93.1% | Only Grok 4.5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 57.1% | 42.7% | Gemini 4 Argon |
| GPQA Diamond (Epoch AI run) | 96.4% | 93.4% | Gemini 4 Argon |
| ARC-AGI | 98.5% | 87.2% | Gemini 4 Argon |
| ARC-AGI-2 | 91.3% | 52.6% | Gemini 4 Argon |
| SimpleBench | Not measured | 70.0% | Only Grok 4.5 measured |
| Chess puzzles | 59.0% | 35.0% | Gemini 4 Argon |
| Mystery game puzzles | 64.0% | Not measured | Only Gemini 4 Argon measured |
| EBR-bench | 64.8% | Not measured | Only Gemini 4 Argon measured |
| LMArena Text: hard prompts | 1546 | 1462 | Gemini 4 Argon |
| LMArena Text: expert | 1550 | 1465 | Gemini 4 Argon |
| LMArena Text: hard prompts in English | 1548 | 1464 | Gemini 4 Argon |
| LMArena Vision: diagrams | Not measured | 1304 | Only Grok 4.5 measured |
| LMArena Vision: homework | Not measured | 1295 | Only Grok 4.5 measured |
| Neither model has a result on the other 3 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| OTIS Mock AIME | 100.0% | 97.8% | Gemini 4 Argon |
| FrontierMath, tiers 1 to 3 | 86.0% | 57.2% | Gemini 4 Argon |
| FrontierMath, tier 4 | 78.0% | 24.4% | Gemini 4 Argon |
| ProofBench | 99.0% | 31.0% | Gemini 4 Argon |
| LMArena Text: math | 1536 | 1460 | Gemini 4 Argon |
| LMArena Text: mathematical work | 1557 | 1482 | Gemini 4 Argon |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index70
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 89.2% | Only Grok 4.5 measured |
| LegalBench (Vals AI) | 88.3% | 86.0% | Gemini 4 Argon |
| CorpFin (Vals AI) | Not measured | 67.4% | Only Grok 4.5 measured |
| TaxEval (Vals AI) | Not measured | 71.7% | Only Grok 4.5 measured |
| MortgageTax (Vals AI) | Not measured | 61.8% | Only Grok 4.5 measured |
| MedCode (Vals AI) | 58.8% | 43.3% | Gemini 4 Argon |
| SimpleQA Verified | 76.0% | 48.3% | Gemini 4 Argon |
| LMArena Text: science | 1548 | 1464 | Gemini 4 Argon |
| LMArena Text: medicine and healthcare | 1555 | 1440 | Gemini 4 Argon |
| LMArena Text: legal and government | 1548 | 1463 | Gemini 4 Argon |
| LMArena Text: business and finance | 1525 | 1441 | Gemini 4 Argon |
| Neither model has a result on the other 6 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index61
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| Design Arena: websites | 1315 | 1281 | Gemini 4 Argon |
| Design Arena: UI components | 1333 | 1279 | Gemini 4 Argon |
| Design Arena: game dev | 1377 | 1263 | Gemini 4 Argon |
| Design Arena: data viz | 1334 | 1267 | Gemini 4 Argon |
| Design Arena: 3D | 1389 | 1257 | Gemini 4 Argon |
| Design Arena: all code categories | 1328 | 1276 | Gemini 4 Argon |
| Design Arena: SVG | Not measured | 1215 | Only Grok 4.5 measured |
| Design Arena: ASCII art | Not measured | 1257 | Only Grok 4.5 measured |
| LiveBench design | 73.7% | 78.1% | Grok 4.5 |
GeneralLike-for-likePublic boards, shown as published, kept out of the index190
| Benchmark | Gemini 4 Argon | Grok 4.5 | Leader |
|---|---|---|---|
| Vals Index | 69.2% | Not measured | Only Gemini 4 Argon measured |
| LiveBench data analysis | 85.2% | 73.0% | Gemini 4 Argon |
| Public Benefits Bench (Vals AI) | 69.8% | Not measured | Only Gemini 4 Argon measured |
| SAGE (Vals AI) | 53.6% | 35.0% | Gemini 4 Argon |
| MedScribe (Vals AI) | 87.4% | 86.9% | Gemini 4 Argon |
| Vals Multimodal Index | Not measured | 63.4% | Only Grok 4.5 measured |
| Long context reasoning (AA-LCR) | 79.7% | 79.3% | Gemini 4 Argon |
| DTBench | 97.6% | 96.5% | Gemini 4 Argon |
| LMCA | 63.7% | 45.2% | Gemini 4 Argon |
| Surface Evolver Bench | Not measured | 74.4% | Only Grok 4.5 measured |
| Furniture assembly | 72.5% | 22.5% | Gemini 4 Argon |
| LMArena Text | 1532 | 1448 | Gemini 4 Argon |
| LMArena Text: instruction following | 1534 | 1445 | Gemini 4 Argon |
| LMArena Text: creative writing | 1527 | 1442 | Gemini 4 Argon |
| LMArena Vision | Not measured | 1287 | Only Grok 4.5 measured |
| LMArena Text: English | 1538 | 1453 | Gemini 4 Argon |
| LMArena Text: non-English | 1522 | 1440 | Gemini 4 Argon |
| LMArena Text: Chinese | 1611 | 1495 | Gemini 4 Argon |
| LMArena Text: German | Not measured | 1448 | Only Grok 4.5 measured |
| LMArena Text: Japanese | Not measured | 1430 | Only Grok 4.5 measured |
| LMArena Text: Korean | Not measured | 1406 | Only Grok 4.5 measured |
| LMArena Text: French | Not measured | 1457 | Only Grok 4.5 measured |
| LMArena Text: Spanish | 1503 | 1451 | Gemini 4 Argon |
| LMArena Text: Russian | 1534 | 1449 | Gemini 4 Argon |
| LMArena Text: Polish | Not measured | 1432 | Only Grok 4.5 measured |
| LMArena Text: multi-turn | 1556 | 1456 | Gemini 4 Argon |
| LMArena Text: longer queries | 1547 | 1462 | Gemini 4 Argon |
| LMArena Text: writing and language | 1529 | 1445 | Gemini 4 Argon |
| LMArena Text: entertainment and media | 1527 | 1434 | Gemini 4 Argon |
| LMArena Vision: English | Not measured | 1285 | Only Grok 4.5 measured |
| LMArena Vision: Chinese | Not measured | 1345 | Only Grok 4.5 measured |
| LMArena Vision: reading text | Not measured | 1293 | Only Grok 4.5 measured |
| LMArena Vision: humor | Not measured | 1276 | Only Grok 4.5 measured |
| LMArena Vision: creative writing | Not measured | 1293 | Only Grok 4.5 measured |
| LMArena Document | Not measured | 1452 | Only Grok 4.5 measured |
| Neither model has a result on the other 11 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Gemini 4 Argon | Grok 4.5 | 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
Grok 4.5 costs less
Repository review
50K input + 3K output tokens
Grok 4.5 costs less
Agent loop
200K input + 10K output tokens
Grok 4.5 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 | Google Gemini 4 Argon | SpaceXAI Grok 4.5 |
|---|---|---|
| Maker | xAI | |
| Weights | No public weights listed | No public weights listed |
| Released | October 13, 2026 | July 8, 2026 |
| Context window | 1.05M | 500K |
| Input $/Mtok | $2.00 | $2.00 |
| Output $/Mtok | $10.00 | $6.00 |
| Coding index | 80.5 | 75.5 |
| Independent measurements behind it | 2 | 2 |
| Cost per solved task | Not computable | $0.62 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Gemini 4 Argon better than Grok 4.5 for coding?
Pick Gemini 4 Argon for coding: it scores 80.5 on the Vibe Coding Index against 75.5 for Grok 4.5. Pick Grok 4.5 when output tokens cost 1.7x less, or when what matters is LiveBench coding or Terminal-Bench 2.1 (Vals AI), where it leads.
Which is cheaper, Gemini 4 Argon or Grok 4.5?
Gemini 4 Argon costs $2.00 per million input tokens and $10.00 per million output tokens; Grok 4.5 costs $2.00 and $6.00. Cost per solved task is known for Grok 4.5 only.
Which has the bigger context window, Gemini 4 Argon or Grok 4.5?
Gemini 4 Argon, with 1.05M tokens against 500K.
How many benchmarks is the Gemini 4 Argon vs Grok 4.5 comparison based on?
77 benchmarks have a result for both models as of October 21, 2026. Gemini 4 Argon's coding index rests on 2 independent benchmarks and Grok 4.5's on 2. Where only one model has a result, the page says so instead of naming a winner.