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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: Claude Opus 4.8 leads on average score with 7.2 vs 7.0. Claude Opus 4.8 has the lower benchmark cost at $0.539 vs $1.079. Claude Opus 4.8 is faster at 3.47s vs 9.93s, with pass rates of 61.9% vs 77.8%.

Recommended model: Claude Opus 4.8 - It has the best score here (7.2), while costing about 2.0x less than Gemini 3.5 Flash.

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 none Release: 2026-05-19
Score 7.2 7.0
Rank #57 #66
Reliability 10.0 10.0
Consistency 9.2 8.9
Tests Correct
Attempt pass rate 61.9% 77.8%
Flaky tests 2 3
Total Runs 63 63
Cost per result 4.485 7.190
Total Cost $0.539 $1.079
Input Price $5.000 / 1M $1.500 / 1M
Output Price $25.000 / 1M $9.000 / 1M
Total Input Tokens 67,104 13,843
Output Tokens 8,107 117,518
Reasoning Tokens 0 0
Response Time (avg) 3.47s 9.93s
Response Time (max) 17.73s 64.36s
Response Time (total) 72.90s 178.68s

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

#66 Gemini 3.5 Flash

none
Cost
$0.225
Time
125.5s
Tokens
25,004 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 2.53s 492 5,101 0
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 8.8 7.8 88.9% 1 34.69s 8,122 75,927 0
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 3.0 10.0 0.0% 0 0ms 0 0 0
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 6.5 10.0 50.0% 0 8.10s 2,781 5,895 0
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 7.6 7.2 77.8% 1 10.64s 633 17,910 0
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 3.46s 486 1,620 0
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 9.8 10.0 100.0% 0 3.38s 615 3,928 0
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 10.0 10.0 100.0% 0 3.13s 558 4,640 0
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 3.0 10.0 0.0% 0 0ms 0 0 0
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 2.8 1.6 33.3% 1 4.87s 156 2,497 0

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