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Anthropic: Claude Opus 4.8 vs xAI: Grok 4.5

Grok 4.5 (high) leads on average score with 8.9 vs 8.8. Grok 4.5 (high) has the lower benchmark cost at $1.707 vs $1.931. Claude Opus 4.8 (medium) is faster at 12.49s vs 76.50s, with pass rates of 84.9% vs 83.3%.

Recommended modelClaude Opus 4.8 (medium)Its score stays close to the best score here (8.8 vs 8.9), while responding about 6.1x faster than Grok 4.5 (high).

Last updated at: 2026-07-17

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Grok 4.5 Grok 4.5 high Release: 2026-07-08
Score 8.8 8.9
Rank #14 #12
Reliability 10.0 10.0
Consistency 9.6 9.2
Tests Correct
Attempt pass rate 84.9% 83.3%
Flaky tests 1 2
Total Runs 66 66
Cost per result 10.724 10.041
Total Cost $1.931 $1.707
Input Price $5.000 / 1M $2.000 / 1M
Output Price $25.000 / 1M $6.000 / 1M
Total Input Tokens 138,451 151,562
Output Tokens 40,766 5,655
Reasoning Tokens 9,075 247,540
Response Time (avg) 12.49s 76.50s
Response Time (max) 70.54s 676.83s
Response Time (total) 274.72s 1683.07s

Hamster playing table tennis

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

#14 Claude Opus 4.8

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

#12 xAI: Grok 4.5

high
Cost
$0.015
Time
29.7s
Tokens
2,737 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% 0 155.16s 9,579 357 100,752

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