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Claude Opus 5.5 (low) vs Gemini 3.1 Pro Preview (medium)

Claude Opus 5.5 (low) leads on average score with 9.3 vs 9.2. Claude Opus 5.5 (low) has the lower benchmark cost at $0.952 vs $1.352. Gemini 3.1 Pro Preview (medium) is faster at 20.62s vs 23.72s, with pass rates of 87.9% vs 90.9%.

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
#22
Total Output Tokens
97,238
Response Time (avg)
20.62s
Total Cost
$1.352
Recommended model Claude Opus 5.5 (low)

It has the strongest score in this comparison (9.3) and the best overall balance of cost and response time across all 2 models.

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19
Score 9.3 9.2
Rank #20 #22
Reliability 10.0 10.0
Consistency 9.3 10.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 87.9% 90.9%
Flaky tests 2 0
Total Runs 66 66
Cost per result 5.284 6.758
Total Cost $0.952 $1.352
Input Price $4.000 / 1M $2.000 / 1M
Output Price $20.000 / 1M $12.000 / 1M
Total Input Tokens 132,746 92,296
Output Tokens 6,454 5,232
Reasoning Tokens 14,550 92,006
Response Time (avg) 23.72s 20.62s
Response Time (max) 89.16s 88.68s
Response Time (total) 521.82s 329.94s
Parameters ~5T total (~500B active) ~1.2T 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

#22 Gemini 3.1 Pro Preview

medium
Cost
$0.115
Time
87.2s
Tokens
9,629 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 3.1 Pro Preview 7.9 9.9 66.7% 0 40.17s 8,124 435 41,247

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