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Anthropic: Claude Opus 4.8 vs xAI: Grok Build 0.1

Summary

Claude Opus 4.8 vs Grok Build 0.1 benchmark comparison: Claude Opus 4.8 leads on average score with 7.7 vs 7.6. Grok Build 0.1 has the lower benchmark cost at $0.927 vs $1.270. Claude Opus 4.8 is faster at 10.83s vs 49.90s, with pass rates of 79.4% vs 61.9%.

Recommended model: Claude Opus 4.8 - It has the best score here (7.7), while responding about 4.6x faster than Grok Build 0.1.

Last updated at: 2026-06-30

Metric Claude Opus 4.8 Claude Opus 4.8 low Release: 2026-05-28 Grok Build 0.1 Grok Build 0.1 medium Release: 2026-05-21
Score 7.7 7.6
Rank #38 #44
Reliability 10.0 10.0
Consistency 8.8 9.9
Tests Correct
Attempt pass rate 79.4% 61.9%
Flaky tests 3 0
Total Runs 63 63
Cost per result 8.466 7.124
Total Cost $1.270 $0.927
Input Price $5.000 / 1M $1.000 / 1M
Output Price $25.000 / 1M $2.000 / 1M
Total Input Tokens 60,946 44,418
Output Tokens 31,771 2,782
Reasoning Tokens 6,831 438,018
Response Time (avg) 10.83s 49.90s
Response Time (max) 127.97s 252.69s
Response Time (total) 227.39s 1047.92s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#38 Claude Opus 4.8

low
Cost
$0.031
Time
14.1s
Tokens
1,345 tok

#44 xAI: Grok Build 0.1

medium
Cost
$0.028
Time
81.3s
Tokens
14,009 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.30s 834 793 371
Grok Build 0.1 8.3 10.0 75.0% 0 7.43s 2,010 220 12,162
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 6.6 4.6 77.8% 2 7.58s 10,590 3,637 809
Grok Build 0.1 5.7 9.7 33.3% 0 108.46s 8,304 1,138 161,452
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 20.84s 23,500 2,216 1,081
Grok Build 0.1 10.0 10.0 100.0% 0 32.81s 12,909 231 16,917
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 6.3 5.8 66.7% 1 2.27s 10,503 310 0
Grok Build 0.1 10.0 10.0 100.0% 0 10.72s 7,761 180 8,876
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 5.3 10.0 33.3% 0 45.53s 975 23,311 3,908
Grok Build 0.1 5.3 10.0 33.3% 0 158.00s 1,764 492 175,294
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 2.55s 708 231 0
Grok Build 0.1 4.4 9.9 0.0% 0 18.41s 825 76 6,345
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 2.78s 909 111 221
Grok Build 0.1 9.8 10.0 100.0% 0 12.36s 1,362 57 9,599
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.01s 894 592 184
Grok Build 0.1 7.7 10.0 66.7% 0 18.26s 1,689 195 20,841
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 6.85s 11,775 370 35
Grok Build 0.1 10.0 10.0 100.0% 0 13.12s 7,263 180 4,969
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 3.0 10.0 0.0% 0 5.48s 258 200 222
Grok Build 0.1 3.0 10.0 0.0% 0 53.51s 531 13 21,563

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