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Anthropic: Claude Opus 4.8 vs Google: Gemini 3.5 Flash

Summary

Claude Opus 4.8 (medium) vs Gemini 3.5 Flash (low) benchmark comparison: Gemini 3.5 Flash (low) leads on average score with 9.2 vs 8.8. Gemini 3.5 Flash (low) has the lower benchmark cost at $0.349 vs $1.107. Gemini 3.5 Flash (low) is faster at 3.27s vs 9.72s, with pass rates of 84.1% vs 90.5%.

Recommended model: Gemini 3.5 Flash (low) - It has the best score here (9.2), while costing about 3.2x less than Claude Opus 4.8 (medium).

Last updated at: 2026-07-10

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Gemini 3.5 Flash Gemini 3.5 Flash low Release: 2026-05-19
Score 8.8 9.2
Rank #15 #8
Reliability 10.0 10.0
Consistency 9.6 10.0
Tests Correct
Attempt pass rate 84.1% 90.5%
Flaky tests 1 0
Total Runs 63 63
Cost per result 6.512 1.834
Total Cost $1.107 $0.349
Input Price $5.000 / 1M $1.500 / 1M
Output Price $25.000 / 1M $9.000 / 1M
Total Input Tokens 61,007 36,938
Output Tokens 26,495 2,033
Reasoning Tokens 5,901 30,519
Response Time (avg) 9.72s 3.27s
Response Time (max) 38.03s 9.05s
Response Time (total) 204.19s 68.65s

Generation showcase

Hamster playing table tennis

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

#15 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 tok

#8 Gemini 3.5 Flash

low
Cost
$0.068
Time
39.1s
Tokens
7,588 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 10.0 10.0 100.0% 0 3.95s 834 1,179 478
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.52s 494 209 2,536
Coding 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 15.33s 10,590 9,945 1,381
Gemini 3.5 Flash 7.8 10.0 66.7% 0 6.71s 8,118 458 13,420
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 38.03s 23,561 5,260 1,588
Gemini 3.5 Flash 10.0 10.0 100.0% 0 6.44s 12,873 351 3,050
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 7.1 5.6 83.3% 1 12.29s 10,503 481 312
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.81s 7,548 279 1,164
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 10.0 33.3% 0 14.59s 975 7,477 900
Gemini 3.5 Flash 7.7 10.0 66.7% 0 3.39s 633 12 4,538
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 2.46s 708 237 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.27s 486 119 916
Instructions following 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 3.32s 909 373 320
Gemini 3.5 Flash 9.9 10.0 100.0% 0 1.86s 615 71 1,652
Puzzle Solving 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 3.95s 894 791 483
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.35s 558 288 2,150
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 8.96s 11,775 301 225
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.27s 5,457 234 403
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 6.14s 258 451 214
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.88s 156 12 690

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