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Anthropic: Claude Opus 4.8 vs xAI: Grok 4.3

Claude Opus 4.8 leads on average score with 7.3 vs 7.1. Grok 4.3 (medium) has the lower benchmark cost at $0.779 vs $1.166. Claude Opus 4.8 is faster at 4.91s vs 47.45s, with pass rates of 63.6% vs 68.2%.

Recommended modelClaude Opus 4.8It has the best score here (7.3), while responding about 9.7x faster than Grok 4.3 (medium).

Last updated at: 2026-07-17

Metric Claude Opus 4.8 Claude Opus 4.8 none Release: 2026-05-28 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 7.3 7.1
Rank #63 #70
Reliability 10.0 10.0
Consistency 9.2 8.6
Tests Correct
Attempt pass rate 63.6% 68.2%
Flaky tests 2 4
Total Runs 66 66
Cost per result 8.969 5.990
Total Cost $1.166 $0.779
Input Price $5.000 / 1M $1.250 / 1M
Output Price $25.000 / 1M $2.500 / 1M
Total Input Tokens 149,206 140,031
Output Tokens 16,797 13,739
Reasoning Tokens 0 227,682
Response Time (avg) 4.91s 47.45s
Response Time (max) 35.03s 216.69s
Response Time (total) 108.03s 1043.83s

Hamster playing table tennis

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

#63 Claude Opus 4.8

none
Cost
$0.053
Time
22.0s
Tokens
2,253 tok

#70 xAI: Grok 4.3

medium
Cost
$0.009
Time
19.0s
Tokens
3,661 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 5.5 10.0 33.3% 0 3.29s 10,590 1,332 0
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226

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