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Claude Opus 5.5 (medium) vs Grok 4.5 (high)

Claude Opus 5.5 (medium) leads on average score with 9.0 vs 9.0. Claude Opus 5.5 (medium) has the lower benchmark cost at $1.080 vs $2.252. Claude Opus 5.5 (medium) is faster at 24.18s vs 72.30s, with pass rates of 89.4% vs 86.4%.

Last updated at: 2026-09-23

Compared models

Rank
#30
Total Output Tokens
27,194
Response Time (avg)
24.18s
Total Cost
$1.080
Rank
#35
Total Output Tokens
324,462
Response Time (avg)
72.30s
Total Cost
$2.252
Recommended model Claude Opus 5.5 (medium)

It has the best score here (9.0), while costing about 2.1x less than Grok 4.5 (high).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 medium Release: 2026-09-23 Grok 4.5 Grok 4.5 high Release: 2026-07-08
Score 9.0 9.0
Rank #30 #35
Reliability 10.0 10.0
Consistency 9.6 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 86.4%
Flaky tests 1 3
Total Runs 66 66
Cost per result 5.683 12.565
Total Cost $1.080 $2.252
Input Price $4.000 / 1M $2.000 / 1M
Output Price $20.000 / 1M $6.000 / 1M
Total Input Tokens 133,954 152,175
Output Tokens 7,292 5,655
Reasoning Tokens 19,902 318,807
Response Time (avg) 24.18s 72.30s
Response Time (max) 90.20s 676.83s
Response Time (total) 532.04s 1590.56s
Parameters ~5T total (~500B active) ~1.7T total (~170B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#30 Claude Opus 5.5

medium
Cost
$0.053
Time
25.6s
Tokens
2,781 tok

#35 SpaceXAI: 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 5.5 8.4 7.4 88.9% 1 13.50s 10,608 636 4,341
Grok 4.5 10.0 10.0 100.0% 0 155.16s 9,579 357 100,752

Quick Compare

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