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Anthropic: Claude Opus 4.6 vs xAI: Grok 4.5

Summary

Claude Opus 4.6 (medium) vs Grok 4.5 (low) benchmark comparison: Grok 4.5 (low) leads on average score with 7.8 vs 7.7. Grok 4.5 (low) has the lower benchmark cost at $0.760 vs $2.053. Grok 4.5 (low) is faster at 15.48s vs 25.89s, with pass rates of 61.9% vs 74.6%.

Recommended model: Grok 4.5 (low) - It has the best score here (7.8), while costing about 2.7x less than Claude Opus 4.6 (medium).

Last updated at: 2026-07-08

Metric Claude Opus 4.6 Claude Opus 4.6 medium Release: 2026-02-05 Grok 4.5 Grok 4.5 low Release: 2026-07-08
Score 7.7 7.8
Rank #42 #34
Reliability 10.0 10.0
Consistency 8.8 9.7
Tests Correct
Attempt pass rate 61.9% 74.6%
Flaky tests 3 1
Total Runs 63 63
Cost per result 17.103 5.061
Total Cost $2.053 $0.760
Input Price $5.000 / 1M $2.000 / 1M
Output Price $25.000 / 1M $6.000 / 1M
Total Input Tokens 53,227 58,652
Output Tokens 47,446 1,735
Reasoning Tokens 24,000 105,233
Response Time (avg) 25.89s 15.48s
Response Time (max) 83.40s 205.28s
Response Time (total) 362.49s 324.98s

Generation showcase

Hamster playing table tennis

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

#42 Claude Opus 4.6

medium
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

#34 xAI: Grok 4.5

low
Cost
$0.011
Time
12.4s
Tokens
2,018 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 4.6 6.4 5.8 66.7% 2 7.45s 840 986 1,071
Grok 4.5 10.0 10.0 100.0% 0 2.75s 2,991 261 3,000
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 5.7 7.1 44.4% 1 30.10s 8,522 13,057 4,121
Grok 4.5 10.0 10.0 100.0% 0 13.72s 9,579 303 15,641
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 76.66s 20,685 8,178 5,194
Grok 4.5 3.0 10.0 0.0% 0 8.16s 15,084 261 2,370
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 7.37s 8,676 691 757
Grok 4.5 10.0 10.0 100.0% 0 3.44s 8,937 225 2,549
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 3.0 10.0 0.0% 0 83.40s 674 14,642 8,687
Grok 4.5 3.0 10.0 0.0% 0 72.64s 2,514 14 70,275
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 5.04s 564 188 292
Grok 4.5 6.1 3.1 66.7% 1 4.88s 1,077 98 1,253
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 2.43s 792 266 467
Grok 4.5 9.8 10.0 100.0% 0 2.80s 1,857 57 1,878
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 7.7 10.0 66.7% 0 4.71s 816 532 630
Grok 4.5 10.0 10.0 100.0% 0 3.20s 2,430 217 2,590
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 9.73s 11,454 861 329
Grok 4.5 10.0 10.0 100.0% 0 5.83s 13,394 284 871
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 3.0 10.0 0.0% 0 63.24s 204 8,045 2,452
Grok 4.5 3.0 10.0 0.0% 0 13.98s 789 15 4,806

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