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Step 5 Preview
Grok 4.20 Multi-Agent Beta
Grok 4.20 Multi-Agent Beta is a proprietary model from xAI. It ranks #52 of 351 on the LMArena text leaderboard with a rating of 1451.
- Developer
- xAI
- Released
- Mar 16, 2026
- Context window
- —
- Price in / out, per 1M tokens
- —
- Weights
- Proprietary
- Inputs
- —
- Reasoning
- —
- Tool use
- —
The rating LMArena published at each update since Mar 16, 2026. Ratings move as votes come in and new models join.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1451 | 52 / 351 | 64.9K |
| CodingLMArena | 1457 | 88 / 346 | 18K |
| MathLMArena | 1441 | 82 / 339 | 3.4K |
| Creative writingLMArena | 1436 | 52 / 349 | 11.3K |
| Instruction followingLMArena | 1420 | 88 / 351 | 22K |
| Hard promptsLMArena | 1448 | 77 / 351 | 42.2K |
| Multi-turnLMArena | 1452 | 64 / 349 | 10.6K |
| Long queriesLMArena | 1431 | 90 / 330 | 28K |
| ExpertLMArena | 1446 | 88 / 305 | 6.5K |
| Legal and governmentIndustries | 1449 | 68 / 325 | 5.2K |
| Medicine and healthcareIndustries | 1453 | 69 / 325 | 4.8K |
| Business and financeIndustries | 1423 | 99 / 344 | 12.9K |
| ChineseLanguages | 1475 | 84 / 328 | 4K |
| SpanishLanguages | 1448 | 68 / 249 | 2K |
| GermanLanguages | 1457 | 45 / 261 | 1.1K |
| FrenchLanguages | 1466 | 54 / 252 | 2.3K |
| JapaneseLanguages | 1406 | 70 / 236 | 625 |
| VisionLMArena | 1259 | 57 / 146 | 24.5K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare Grok 4.20 Multi-Agent Beta
xAI
The lab behind Grok, trained on one of the largest compute clusters and integrated with X. Founded 2023, based in San Francisco Bay Area. x.ai
Questions
Who makes Grok 4.20 Multi-Agent Beta?
Grok 4.20 Multi-Agent Beta is made by xAI, founded 2023 and based in San Francisco Bay Area.
How does Grok 4.20 Multi-Agent Beta rank?
#52 of 351 on LMArena’s text leaderboard, rated 1451 (95% interval 1447–1454) from 64,928 votes, as of Oct 22, 2026.
Is Grok 4.20 Multi-Agent Beta open source?
No. Grok 4.20 Multi-Agent Beta is proprietary and served through its provider’s API.