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Anthropic: Claude Opus 4.8 vs Google: Gemini 3.5 Flash

Summary

Claude Opus 4.8 vs Gemini 3.5 Flash benchmark comparison: Gemini 3.5 Flash leads on average score with 9.1 vs 7.2. Claude Opus 4.8 has the lower benchmark cost at $0.539 vs $0.582. Claude Opus 4.8 is faster at 3.47s vs 4.94s, with pass rates of 61.9% vs 87.3%.

Recommended model: Gemini 3.5 Flash - It has the strongest score in this comparison (9.1) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-06-18

Metric Claude Opus 4.8 Claude Opus 4.8 none Release: 2026-05-28 Gemini 3.5 Flash Gemini 3.5 Flash medium Release: 2026-05-19
Score 7.2 9.1
Rank #57 #8
Reliability 10.0 10.0
Consistency 9.2 9.6
Tests Correct
Attempt pass rate 61.9% 87.3%
Flaky tests 2 1
Total Runs 63 63
Cost per result 4.485 3.229
Total Cost $0.539 $0.582
Input Price $5.000 / 1M $1.500 / 1M
Output Price $25.000 / 1M $9.000 / 1M
Total Input Tokens 67,104 36,936
Output Tokens 8,107 2,001
Reasoning Tokens 0 56,408
Response Time (avg) 3.47s 4.94s
Response Time (max) 17.73s 18.07s
Response Time (total) 72.90s 103.79s

Generation showcase

Hamster playing table tennis

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

#57 Claude Opus 4.8

none
Cost
$0.053
Time
22.0s
Tokens
2,253 tok

#8 Gemini 3.5 Flash

medium
Cost
$0.201
Time
112.9s
Tokens
22,371 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 6.5 10.0 50.0% 0 3.40s 834 1,472 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.09s 492 171 3,385
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 5.5 10.0 33.3% 0 3.29s 10,590 1,332 0
Gemini 3.5 Flash 7.9 7.5 77.8% 1 12.63s 8,118 461 24,939
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.5 10.0 100.0% 0 17.73s 29,658 3,259 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 12.05s 12,873 351 7,807
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 7.3 5.8 83.3% 1 1.77s 10,503 308 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 4.07s 7,548 279 3,784
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 5.3 7.2 44.4% 1 1.66s 975 61 0
Gemini 3.5 Flash 7.7 10.0 66.7% 0 5.24s 633 12 8,047
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.48s 708 230 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.52s 486 115 1,144
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.9 10.0 100.0% 0 1.37s 909 95 0
Gemini 3.5 Flash 9.9 10.0 100.0% 0 2.70s 615 71 2,855
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 7.7 10.0 66.7% 0 2.74s 894 783 0
Gemini 3.5 Flash 7.7 10.0 66.7% 0 2.38s 558 295 2,747
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 5.35s 11,775 355 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.81s 5,457 234 455
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 3.0 10.0 0.0% 0 3.41s 258 212 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.75s 156 12 1,245

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