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Claude Opus 5.5 (low) vs Gemini 3.8 Flash (high)

Gemini 3.8 Flash (high) leads on average score with 9.9 vs 9.4. Claude Opus 5.5 (low) has the lower benchmark cost at $1.733 vs $1.927. Claude Opus 5.5 (low) is faster at 25.68s vs 40.60s, with pass rates of 88.4% vs 98.6%.

Last updated at: 2026-10-19

Compared models

Rank
#24
Total Output Tokens
25,006
Response Time (avg)
25.68s
Total Cost
$1.733
Rank
#2
Total Output Tokens
446,728
Response Time (avg)
40.60s
Total Cost
$1.927
Recommended model Gemini 3.8 Flash (high)

It has the strongest score in this comparison (9.9) and the best overall balance of cost and response time across 2 models.

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 Gemini 3.8 Flash Gemini 3.8 Flash high Release: 2026-09-02
Score 9.4 9.9
Rank #24 #2
Reliability 10.0 10.0
Consistency 9.3 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 88.4% 98.6%
Flaky tests 2 1
Total Runs 69 69
Cost per result 9.118 8.756
Total Cost $1.733 $1.927
Input Price $4.000 / 1M $0.750 / 1M
Output Price $20.000 / 1M $3.750 / 1M
Cache Read Price $0.200 / 1M $0.075 / 1M
Cache Write Price $5.000 / 1M $0.042 / 1M
Total Input Tokens 308,056 334,568
Output Tokens 9,434 11,394
Reasoning Tokens 15,572 435,334
Response Time (avg) 25.68s 40.60s
Response Time (max) 89.16s 177.08s
Response Time (total) 590.71s 933.73s
Parameters ~5T total (~500B active) ~500B total (~20B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#24 Claude Opus 5.5

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

#2 Gemini 3.8 Flash

high
Cost
$0.077
Time
129.1s
Tokens
20,373 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 3.8 Flash 10.0 10.0 100.0% 0 29.30s 8,118 462 50,196

Quick Compare

Switch Comparison Pair

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