Grok 4.1 Fast (Reasoning)
| Released | 2025-11-19 |
|---|---|
| Price per 1M | $0.20 in · $0.50 out |
| Overall score | 50.3 · rank 110 |
| Context window | 2,000,000 tokens |
| Provider | xAI |
| Weights | Proprietary |
Scores
| Dimension | Score | Rank | Benchmarks |
|---|---|---|---|
| Overall: Balanced | 50.3 | 110 | 14 |
| Overall: Coding | 47.6 | 127 | 9 |
| Overall: Reasoning | 53.0 | 92 | 5 |
| Overall: Agentic work | 52.0 | 100 | 7 |
| Overall: Frontend | 38.0 | 182 | 6 |
| Coding | 48.8 | 124 | 2 |
| Agents | 52.2 | 94 | 2 |
| Reasoning | 56.5 | 73 | 3 |
| Math | 50.4 | 105 | 1 |
| Knowledge | 49.6 | 95 | 1 |
| Frontend | 31.2 | 130 | 2 |
| General | 52.8 | 80 | 1 |
| Multimodal | 46.7 | 87 | 2 |
| Value vs price | +6.3 | 61 |
Evidence
Coding 48.8 ±3.3
| Benchmark | Result | Source | Date |
|---|---|---|---|
| SWE-bench Verified (Vals run) | 41.4% | Vals AI | 2026-09-01 |
| LiveCodeBench (Vals run) | 80.6% | Vals AI | 2026-09-01 |
Agents 52.2 ±3.2
| Benchmark | Result | Source | Date |
|---|---|---|---|
| BFCL v4 | 69.6% | BFCL | 2026-04-12 |
| Vending-Bench 2 | $1,107 | Epoch AI | 2026-11-11 |
Reasoning 56.5 ±3.8
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Extended NYT Connections | 87.4% | Lech Mazur | 2026-11-10 |
| GPQA Diamond (Vals run) | 84.3% | Vals AI | 2026-09-01 |
| SimpleBench | 56.0% | Epoch AI | 2026-11-11 |
Math 50.4 ±3.1
| Benchmark | Result | Source | Date |
|---|---|---|---|
| ProofBench | 4.0% | Epoch AI | 2026-11-11 |
Knowledge 49.6 ±4.7
| Benchmark | Result | Source | Date |
|---|---|---|---|
| MMLU-Pro (Vals run) | 84.2% | Vals AI | 2026-09-01 |
Frontend 31.2 ±0.7
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Vibe Code Bench v1.1 | 1.2% | Vals AI | 2026-11-09 |
| LMArena WebDev | 1,242 | LMArena | 2026-11-10 |
General 52.8 ±4.1
| Benchmark | Result | Source | Date |
|---|---|---|---|
| LMArena Text | 1,431 | LMArena | 2026-11-09 |
Multimodal 46.7 ±2.3
| Benchmark | Result | Source | Date |
|---|---|---|---|
| MMMU-Pro (Vals run) | 72.7% | Vals AI | 2026-09-01 |
| LMArena Vision | 1,196 | LMArena | 2026-11-09 |
Names matched to this model
grok-4-1-fast-reasoning