Rankings / xAI
Grok 4 Fast
released 2025-09-19
BenchAtlas Index
as of 2026-07-14
thinking
rank #217
9 families · 5 categories · high
no reasoning
rank #346
9 families · 5 categories · high
Benchmark evidence
23 results
agentic coding
| τ²-Bench | thinking | 65.8 % | independent | Artificial Analysis |
| τ²-Bench | no reasoning | 63.7 % | independent | Artificial Analysis |
coding
| LiveCodeBench v6 implementation=artificial-analysis | thinking | 83.2 % | independent | Artificial Analysis |
| LiveCodeBench v6 implementation=artificial-analysis | no reasoning | 40.1 % | independent | Artificial Analysis |
| SciCode | thinking | 44.2 % | independent | Artificial Analysis |
| SciCode | no reasoning | 32.9 % | independent | Artificial Analysis |
external indices
| Intelligence Index v4.1 | thinking | 27.4 points | independent | Artificial Analysis |
| Intelligence Index v4.1 | no reasoning | 16.5 points | independent | Artificial Analysis |
| AA Math Index | thinking | 89.7 points | independent | Artificial Analysis |
| AA Math Index | no reasoning | 41.3 points | independent | Artificial Analysis |
| ECI | 144.6 points | independent | Epoch AI Benchmarking Hub |
knowledge science
| GPQA Diamond implementation=artificial-analysis | thinking | 84.7 % | independent | Artificial Analysis |
| GPQA Diamond implementation=artificial-analysis | no reasoning | 60.6 % | independent | Artificial Analysis |
| Humanity's Last Exam implementation=artificial-analysis | thinking | 17.0 % | independent | Artificial Analysis |
| Humanity's Last Exam implementation=artificial-analysis | no reasoning | 5.0 % | independent | Artificial Analysis |
| MMLU-Pro implementation=artificial-analysis | thinking | 85.0 % | independent | Artificial Analysis |
| MMLU-Pro implementation=artificial-analysis | no reasoning | 73.0 % | independent | Artificial Analysis |
long context instruction
| AA-LCR | thinking | 64.7 % | independent | Artificial Analysis |
| AA-LCR | no reasoning | 20.0 % | independent | Artificial Analysis |
| IFBench | thinking | 50.5 % | independent | Artificial Analysis |
| IFBench | no reasoning | 37.7 % | independent | Artificial Analysis |
reasoning math
| AIME year=2025 · implementation=artificial-analysis | thinking | 89.7 % | independent | Artificial Analysis |
| AIME year=2025 · implementation=artificial-analysis | no reasoning | 41.3 % | independent | Artificial Analysis |
Agent + model results
systems, not bare-model scores
| agent + model terminus-2 + Grok 4 Fast | Terminal-Bench 1.0 | 31.3 % | community | Terminal-Bench Leaderboard |
| agent + model Artificial Analysis harness + Grok 4 Fast | Terminal-Bench Hard | 18.9 % | independent | Artificial Analysis |
| agent + model Artificial Analysis harness + Grok 4 Fast | Terminal-Bench Hard | 12.1 % | independent | Artificial Analysis |
These scores measure the whole agent system (scaffold, tools, budgets) — they are never merged into the bare model’s numbers.