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Anthropic: Claude Opus 4.8 vs Google: Gemini 3.5 Flash

Last updated at: 2026-05-28

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19
Score 8.7 9.6
Rank #12 #2
Reliability 10.0 10.0
Consistency 9.6 9.6
Tests Correct
Attempt pass rate 83.3% 96.7%
Flaky tests 1 1
Total Runs 60 60
Cost per result 6.285 5.231
Total Cost $1.006 $0.994
Input Price $5.000 / 1M $1.500 / 1M
Output Price $25.000 / 1M $9.000 / 1M
Output Tokens 23,201 1,969
Reasoning Tokens 5,901 102,679
Response Time (avg) 9.34s 8.30s
Response Time (max) 38.03s 34.82s
Response Time (total) 186.84s 165.92s

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) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.95s 1,179 478
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.57s 174 4,997
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 14.97s 6,651 1,381
Gemini 3.5 Flash 10.0 10.0 100.0% 0 24.62s 450 34,170
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 38.03s 5,260 1,588
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.37s 351 16,323
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 7.1 5.6 83.3% 1 12.29s 481 312
Gemini 3.5 Flash 10.0 10.0 100.0% 0 6.43s 279 8,466
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 5.3 10.0 33.3% 0 14.15s 7,477 900
Gemini 3.5 Flash 7.6 7.2 77.8% 1 14.09s 12 24,721
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 2.46s 237 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.63s 115 1,650
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.32s 373 320
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.35s 70 3,799
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.95s 791 483
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.23s 241 4,940
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 8.96s 301 225
Gemini 3.5 Flash 9.8 10.0 100.0% 0 4.96s 265 1,608
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 3.0 10.0 0.0% 0 6.14s 451 214
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.94s 12 2,005

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