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Claude Opus 5.5 (low) vs Gemini 3.5 Flash (high)

Gemini 3.5 Flash (high) leads on average score with 9.4 vs 9.3. Claude Opus 5.5 (low) has the lower benchmark cost at $0.952 vs $2.011. Gemini 3.5 Flash (high) is faster at 15.46s vs 23.72s, with pass rates of 87.9% vs 89.4%.

Last updated at: 2026-09-23

Compared models

Rank
#20
Total Output Tokens
21,004
Response Time (avg)
23.72s
Total Cost
$0.952
Rank
#12
Total Output Tokens
205,482
Response Time (avg)
15.46s
Total Cost
$2.011
Recommended model Claude Opus 5.5 (low)

Its score stays close to the best score here (9.3 vs 9.4), while costing about 2.1x less than Gemini 3.5 Flash (high).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19
Score 9.3 9.4
Rank #20 #12
Reliability 10.0 10.0
Consistency 9.3 9.3
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 87.9% 89.4%
Flaky tests 2 2
Total Runs 66 66
Cost per result 5.284 10.580
Total Cost $0.952 $2.011
Input Price $4.000 / 1M $1.500 / 1M
Output Price $20.000 / 1M $9.000 / 1M
Total Input Tokens 132,746 107,146
Output Tokens 6,454 8,777
Reasoning Tokens 14,550 196,705
Response Time (avg) 23.72s 15.46s
Response Time (max) 89.16s 145.92s
Response Time (total) 521.82s 340.20s
Parameters ~5T total (~500B active) ~500B total (~20B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#20 Claude Opus 5.5

low
Invalid SVG
Cost
$0.038
Time
19.1s
Tokens
2,010 tok

#12 Gemini 3.5 Flash

high
Cost
$0.208
Time
118.2s
Tokens
23,158 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 10.0 10.0 100.0% 0 12.23s 10,608 575 2,777
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.96s 8,118 456 47,129

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