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Anthropic: Claude Opus 4.8 vs Google: Gemini 3 Flash Preview

Summary

Claude Opus 4.8 vs Gemini 3 Flash Preview benchmark comparison: Gemini 3 Flash Preview leads on average score with 9.6 vs 7.7. Gemini 3 Flash Preview has the lower benchmark cost at $0.667 vs $1.270. Claude Opus 4.8 is faster at 10.83s vs 18.64s, with pass rates of 79.4% vs 98.4%.

Recommended model: Gemini 3 Flash Preview - It has the best score here (9.6), while costing about 1.9x less than Claude Opus 4.8.

Last updated at: 2026-06-30

Metric Claude Opus 4.8 Claude Opus 4.8 low Release: 2026-05-28 Gemini 3 Flash Preview Gemini 3 Flash Preview medium Release: 2025-12-17
Score 7.7 9.6
Rank #38 #2
Reliability 10.0 10.0
Consistency 8.8 9.7
Tests Correct
Attempt pass rate 79.4% 98.4%
Flaky tests 3 1
Total Runs 63 63
Cost per result 8.466 3.335
Total Cost $1.270 $0.667
Input Price $5.000 / 1M $0.500 / 1M
Output Price $25.000 / 1M $3.000 / 1M
Total Input Tokens 60,946 37,017
Output Tokens 31,771 2,006
Reasoning Tokens 6,831 214,153
Response Time (avg) 10.83s 18.64s
Response Time (max) 127.97s 117.26s
Response Time (total) 227.39s 391.35s

Generation showcase

Hamster playing table tennis

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

#38 Claude Opus 4.8

low
Cost
$0.031
Time
14.1s
Tokens
1,345 tok

#2 Gemini 3 Flash Preview

medium
Cost
$0.010
Time
17.9s
Tokens
3,236 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 3.30s 834 793 371
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 3.88s 494 330 3,216
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 6.6 4.6 77.8% 2 7.58s 10,590 3,637 809
Gemini 3 Flash Preview 8.6 7.6 88.9% 1 84.40s 8,122 462 161,084
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 20.84s 23,500 2,216 1,081
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 22.42s 12,873 351 10,485
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 6.3 5.8 66.7% 1 2.27s 10,503 310 0
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.43s 7,548 279 4,893
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 45.53s 975 23,311 3,908
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 15.27s 633 12 21,684
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 2.55s 708 231 0
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.19s 486 72 1,905
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 2.78s 909 111 221
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.04s 615 72 2,709
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 3.01s 894 592 184
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.05s 558 183 4,365
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 6.85s 11,775 370 35
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 12.60s 5,532 234 1,487
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 5.48s 258 200 222
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.50s 156 11 2,325

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