Grok 4.1 Fast (Reasoning)
xAIProprietary
Grok 4.1 Fast (Reasoning) is a vision-language model from xAI. It ranks 94 of 167 on LMArena’s overall vision board with 1201±7 from 13,368 votes. Its best category is Entity recognition (#17 of 51). License: Proprietary.
Key figures
- Developer
- xAI
- License
- Proprietary
- First seen (our snapshots)
- 2026-10-26
No data: Captioning.
Who it suits
- Overall #94 of 167: lower half; consider it mainly for cost or deployment reasons.
- Strongest category: Entity recognition (#17 of 51).
- Proprietary; used through xAI’s apps or API.
Neighbours on the overall board
| # | Model | Score | Votes | License | Δ vs this model |
|---|---|---|---|---|---|
| 91 |  Qwen3-VL-235B-A22B-Thinking Alibaba | 1207 | 2,387 | Apache 2.0 | +6 |
| 92 | NNVIDIA-Nemotron-3.5-Super-VL-120B-A12B (NVFP4) NVIDIA | 1205 | 2,509 | OpenMDW-1.1 | +4 |
| 93 |  GPT-5 mini (High) OpenAI | 1202 | 28,943 | Proprietary | +1 |
| 94 | Grok 4.1 Fast (Reasoning) xAI | 1201 | 13,368 | Proprietary | |
| 95 |  Gemini 2.5 Flash-Lite Preview (Non-Thinking, 09-2025) Google | 1198 | 4,862 | Proprietary | -3 |
| 96 | GPT-5.4 nano (High) OpenAI | 1196 | 25,624 | Proprietary | -5 |
| 97 | GPT-4.5 Preview (2025-02-27) OpenAI | 1195 | 2,925 | Proprietary | -6 |
Alternatives · More from xAI
| # | Model | Score | Votes | License |
|---|---|---|---|---|
| 31 | Grok 4.5 xAI | 1287 | 12,599 | Proprietary |
| 52 | Grok 4.6 (High) xAI | 1263 | 7,261 | Proprietary |
| 55 | Grok 4.20 Beta (Reasoning, 0309) xAI | 1262 | 26,796 | Proprietary |
| 57 | Grok 4.20 Multi-Agent Beta (0309) xAI | 1259 | 24,532 | Proprietary |
| 79 | Grok 4.7 (xHigh) xAI | 1231 | 3,736 | Proprietary |
Alternatives · Top open-weight models
| # | Model | Score | Votes | License |
|---|---|---|---|---|
| 24 |  GLM-5.3-Flash Z.ai | 1294 | 16,254 | MIT |
| 34 |  Kimi K2.6 Moonshot AI | 1282 | 16,368 | Modified MIT |
| 38 |  DeepSeek-V4.1-Flash-20260910 (Max) DeepSeek | 1278 | 4,100 | MIT |
| 39 | Gemma 4 31B Google | 1276 | 40,219 | Apache 2.0 |
| 44 | Qwen3.8-27B Alibaba | 1269 | 7,614 | Apache 2.0 |
How to read these scores
- If two scores differ by less than their ± intervals, the models are statistically close.
- Each category board is computed independently; do not compare scores across categories.
- Models with few votes move more; ranks of new entries may change.
FAQ
Where does Grok 4.1 Fast (Reasoning) rank among vision models?
Overall rank 94 (1201); OCR rank 99 (1195); Diagrams rank 93 (1210); Homework rank 104 (1172); Entity recognition rank 17 (1251); Creative writing rank 65 (1233); Humor rank 53 (1239); English rank 89 (1219); Chinese rank 81 (1233) (LMArena, data as of Oct 26, 2026).
How good is Grok 4.1 Fast (Reasoning) at OCR?
Grok 4.1 Fast (Reasoning) ranks 99 of 123 on LMArena’s OCR board with 1195 (9,260 votes).
Is Grok 4.1 Fast (Reasoning) better with Chinese or English prompts?
Chinese board: #81 of 128 (1233); English board: #89 of 167 (1219). The boards are computed separately, so compare ranks rather than scores.
Is Grok 4.1 Fast (Reasoning) open-weight?
No. LMArena lists it as Proprietary; it is available through xAI’s apps or API.
How far is Grok 4.1 Fast (Reasoning) from #1?
#1 overall is Claude Fable 5 (High) (1325); Grok 4.1 Fast (Reasoning) has 1201, 124 points behind.
Sources
LMArena data published Oct 19, 2026.
Synced here Oct 26, 2026.
Price, context length and release date have no reliable public data here and are not shown; all figures come from snapshots, blanks are –.