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Anthropic: Claude Opus 4.8 vs xAI: Grok 4.5

Claude Opus 4.8 (medium) leads on average score with 8.8 vs 8.4. Grok 4.5 (low) has the lower benchmark cost at $0.935 vs $1.931. Claude Opus 4.8 (medium) is faster at 12.49s vs 15.56s, with pass rates of 84.9% vs 75.8%.

Recommended modelClaude Opus 4.8 (medium)It has the strongest score in this comparison (8.8) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-21

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Grok 4.5 Grok 4.5 low Release: 2026-07-08
Score 8.8 8.4
Rank #17 #23
Reliability 10.0 10.0
Consistency 9.6 9.7
Tests Correct
Attempt pass rate 84.9% 75.8%
Flaky tests 1 1
Total Runs 66 66
Cost per result 10.724 5.844
Total Cost $1.931 $0.935
Input Price $5.000 / 1M $2.000 / 1M
Output Price $25.000 / 1M $6.000 / 1M
Total Input Tokens 138,451 125,596
Output Tokens 40,766 7,505
Reasoning Tokens 9,075 106,446
Response Time (avg) 12.49s 15.56s
Response Time (max) 70.54s 205.28s
Response Time (total) 274.72s 342.32s

Hamster playing table tennis

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

#17 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 tok

#23 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

Coding 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 15.33s 10,590 9,945 1,381
Grok 4.5 10.0 10.0 100.0% 0 13.72s 9,579 303 15,641

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