Reported by APEX-Agents
56.2%
Tasks passed · rank 15 of 39
- Unit
- % of tasks, higher is better
- Configuration
- Grok 4.5
- Measured
- 1 Oct 2026
- Not shown
- Not your firm's documents or tools; graded by rubric, not by a client.
Models / Grok 4.5
xAI
Grok 4.5
31 published results from 8 sources. Each card shows where the number comes from and what it does not measure. The overall leaderboard combines them; here each stands alone.
- Provider
- xAI
- Sources
- 8
- Our benchmarks
- 0
- Price per million tokens
- $2.00 in · $6.00 out
OpenRouter list price, 1 Oct 2026 · 500,000-token context
Reported by others
Reported by Arena (formerly LMArena)
-0.01
Confirmed task success · rank 19 of 46
- Unit
- IPS effect estimate, higher is better
- Range
- -0.03 to 0.01
- Sample
- 28644 observations
- Configuration
- Grok 4.5
- Measured
- 28 Sep 2026
- Not shown
- Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
-0.03
Praise over complaint · rank 21 of 46
- Unit
- IPS effect estimate, higher is better
- Range
- -0.06 to 0.00
- Sample
- 9705 observations
- Configuration
- Grok 4.5
- Measured
- 28 Sep 2026
- Not shown
- Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
0.04
Steerability · rank 6 of 46
- Unit
- IPS effect estimate, higher is better
- Range
- 0.02 to 0.06
- Sample
- 32989 observations
- Configuration
- Grok 4.5
- Measured
- 28 Sep 2026
- Not shown
- Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
0.00
Tool grounding · rank 1 of 46
- Unit
- IPS effect estimate, higher is better
- Range
- 0.00 to 0.00
- Sample
- 2071292 observations
- Configuration
- Grok 4.5
- Measured
- 28 Sep 2026
- Not shown
- Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
1,464
Overall · rank 12 of 44
- Unit
- Arena rating, higher is better
- Range
- 1,456 to 1,473
- Sample
- 4965 votes
- Configuration
- Grok 4.5
- Measured
- 13 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,202
Overall · rank 5 of 34
- Unit
- Arena rating, higher is better
- Range
- 1,195 to 1,209
- Sample
- 31505 votes
- Configuration
- Grok 4.5
- Measured
- 24 Aug 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,465
Overall · rank 24 of 177
- Unit
- Arena rating, higher is better
- Range
- 1,462 to 1,469
- Sample
- 37162 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not an error rate: claims that cannot be checked on the web are skipped, and preference still carries most of the weight.
Reported by Arena (formerly LMArena)
1,465
Business, management and finance · rank 22 of 402
- Unit
- Arena rating, higher is better
- Range
- 1,457 to 1,473
- Sample
- 7290 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,452
Creative writing · rank 18 of 407
- Unit
- Arena rating, higher is better
- Range
- 1,444 to 1,460
- Sample
- 7601 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,488
Expert prompts · rank 26 of 359
- Unit
- Arena rating, higher is better
- Range
- 1,479 to 1,498
- Sample
- 4428 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,462
Instruction following · rank 24 of 409
- Unit
- Arena rating, higher is better
- Range
- 1,456 to 1,468
- Sample
- 13752 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,465
Overall · rank 34 of 409
- Unit
- Arena rating, higher is better
- Range
- 1,461 to 1,470
- Sample
- 37535 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,459
Writing, literature and language · rank 17 of 408
- Unit
- Arena rating, higher is better
- Range
- 1,452 to 1,466
- Sample
- 10131 votes
- Configuration
- Grok 4.5
- Measured
- 25 Sep 2026
- Not shown
- Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Artificial Analysis
72.4
Artificial Analysis Coding Index · rank 37 of 151
- Unit
- index score, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not your codebase or tools.
Reported by Artificial Analysis
38.8
Artificial Analysis Intelligence Index · rank 64 of 314
- Unit
- index score, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not business work, and a blend: read the parts for any one task.
Reported by Artificial Analysis
93.1%
GPQA Diamond · rank 24 of 276
- Unit
- % of questions, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not applied work; multiple-choice science questions.
Reported by Artificial Analysis
42.7%
Humanity's Last Exam · rank 55 of 314
- Unit
- % of questions, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not everyday work; academic questions at the edge of expertise.
Reported by Artificial Analysis
79.3%
Long-context reasoning (AA-LCR) · rank 81 of 309
- Unit
- % of questions, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not retrieval over your own document store.
Reported by Artificial Analysis
55.0%
SciCode · rank 48 of 153
- Unit
- % of problems, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not general software engineering.
Reported by Artificial Analysis
81.6%
Terminal-Bench 2.1 · rank 40 of 151
- Unit
- % of tasks, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not other harnesses or tools; superseded by 4.0 for newer models.
Reported by Artificial Analysis
10.6%
Terminal-Bench 4.0 · rank 73 of 150
- Unit
- % of tasks, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not other harnesses or tools; one attempt per task.
Reported by Artificial Analysis
42.1%
Τ-bench banking · rank 24 of 142
- Unit
- % of tasks, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not your policies or systems; a simulated customer.
Reported by GDP.pdf
14.0%
Professional document tasks · rank 35 of 49
- Unit
- % of rubric, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 1 Oct 2026
- Not shown
- Not your documents; 100 tasks, so small differences are noise.
Reported by SimpleQA Verified (Epoch AI)
48.3%
Correct answers · rank 29 of 85
- Unit
- % of questions, higher is better
- Configuration
- Grok 4.5 (high)
- Measured
- 27 Aug 2026
- Not shown
- Not answers grounded in your documents; tests what the model remembers.
Reported by tau2-bench
32.0%
Consistency (pass^4) · rank 2 of 21
- Unit
- % of tasks, higher is better
- Configuration
- Grok 4.5 (high reasoning, tau2)
- Measured
- 24 Jul 2026
- Not shown
- Not your policies or customers: the tasks and policies are tau2's own, and the customer is simulated by gpt-5.2.
Reported by tau2-bench
47.9%
Task success (pass^1) · rank 3 of 21
- Unit
- % of tasks, higher is better
- Configuration
- Grok 4.5 (high reasoning, tau2)
- Measured
- 24 Jul 2026
- Not shown
- Not your policies or customers: the tasks and policies are tau2's own, and the customer is simulated by gpt-5.2.
Reported by UGI Leaderboard
21.0%
Requested-length error · rank 195 of 370
- Unit
- % off the requested word count, lower is better
- Configuration
- Grok 4.5
- Measured
- 8 Jul 2026
- Not shown
- Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
0.32
Style adherence · rank 292 of 370
- Unit
- score from 0 to 1, higher is better
- Configuration
- Grok 4.5
- Measured
- 8 Jul 2026
- Not shown
- Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
60.0
Writing score · rank 102 of 370
- Unit
- score out of 100, higher is better
- Configuration
- Grok 4.5
- Measured
- 8 Jul 2026
- Not shown
- Not business copy quality: UGI's prompts are private and lean towards creative writing, and models that often refuse get no score.
Reported by Vending-Bench 2
$3,887.43
Money after a year · rank 37 of 63
- Unit
- US dollars, higher is better
- Configuration
- Grok 4.5
- Measured
- 1 Oct 2026
- Not shown
- Not a real business; one simulated market with set rules.