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Claude Opus 5.5 (medium) vs Claude Sonnet 5.5 (max)

The average score is effectively tied at 9.0 vs 9.0. Claude Opus 5.5 (medium) has the lower benchmark cost at $1.080 vs $7.545. Claude Opus 5.5 (medium) is faster at 24.18s vs 83.04s, with pass rates of 89.4% vs 81.8%.

Last updated at: 2026-09-29

Compared models

Rank
#35
Total Output Tokens
27,194
Response Time (avg)
24.18s
Total Cost
$1.080
Rank
#39
Total Output Tokens
727,349
Response Time (avg)
83.04s
Total Cost
$7.545
Recommended model Claude Opus 5.5 (medium)

It has the best score here (9.0), while costing about 7.0x less than Claude Sonnet 5.5 (max).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 medium Release: 2026-09-23 Claude Sonnet 5.5 Claude Sonnet 5.5 max Release: 2026-09-29
Score 9.0 9.0
Rank #35 #39
Reliability 10.0 10.0
Consistency 9.6 9.4
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 81.8%
Flaky tests 1 2
Total Runs 66 66
Cost per result 5.683 44.380
Total Cost $1.080 $7.545
Input Price $4.000 / 1M $2.000 / 1M
Output Price $20.000 / 1M $10.000 / 1M
Total Input Tokens 133,954 135,496
Output Tokens 7,292 8,153
Reasoning Tokens 19,902 719,196
Response Time (avg) 24.18s 83.04s
Response Time (max) 90.20s 488.39s
Response Time (total) 532.04s 1826.84s
Parameters ~5T total (~500B active) ~1T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#35 Claude Opus 5.5

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

#39 Claude Sonnet 5.5

max
OpenRouter returned no showcase content (finish_reason: length).
Cost
$0.000
Time
571.7s
Tokens
0 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
Claude Sonnet 5.5 10.0 10.0 100.0% 0 55.26s 10,608 580 70,730

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