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Anthropic: Claude Opus 4.8 vs Google: Gemini 2.5 Flash

Summary

Claude Opus 4.8 vs Gemini 2.5 Flash benchmark comparison: Gemini 2.5 Flash leads on average score with 8.2 vs 7.7. Gemini 2.5 Flash has the lower benchmark cost at $0.379 vs $1.270. Claude Opus 4.8 is faster at 10.83s vs 15.49s, with pass rates of 79.4% vs 69.8%.

Recommended model: Gemini 2.5 Flash - It has the best score here (8.2), while costing about 3.4x less than Claude Opus 4.8.

Last updated at: 2026-07-02

Metric Claude Opus 4.8 Claude Opus 4.8 low Release: 2026-05-28 Gemini 2.5 Flash Gemini 2.5 Flash medium Release: 2025-06-17
Score 7.7 8.2
Rank #38 #24
Reliability 10.0 10.0
Consistency 8.8 9.6
Tests Correct
Attempt pass rate 79.4% 69.8%
Flaky tests 3 1
Total Runs 63 63
Cost per result 8.466 2.701
Total Cost $1.270 $0.379
Input Price $5.000 / 1M $0.300 / 1M
Output Price $25.000 / 1M $2.500 / 1M
Total Input Tokens 60,946 34,476
Output Tokens 31,771 1,930
Reasoning Tokens 6,831 145,145
Response Time (avg) 10.83s 15.49s
Response Time (max) 127.97s 95.48s
Response Time (total) 227.39s 325.39s

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

#24 Gemini 2.5 Flash

medium
Invalid SVG
Cost
$0.000
Time
274.0s
Tokens
0 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 2.5 Flash 8.4 10.0 75.0% 0 6.30s 492 255 10,233
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 2.5 Flash 7.8 10.0 66.7% 0 41.01s 6,669 543 32,303
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 2.5 Flash 10.0 10.0 100.0% 0 28.44s 12,522 303 11,922
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 2.5 Flash 10.0 10.0 100.0% 0 4.06s 7,257 279 2,325
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 2.5 Flash 5.9 7.2 55.6% 1 37.34s 633 18 80,702
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 2.5 Flash 4.8 10.0 0.0% 0 4.86s 486 92 1,899
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 2.5 Flash 9.8 10.0 100.0% 0 2.62s 615 69 1,203
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 2.5 Flash 7.7 10.0 66.7% 0 3.18s 558 126 2,499
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 2.5 Flash 10.0 10.0 100.0% 0 6.20s 5,088 234 1,140
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 2.5 Flash 3.0 10.0 0.0% 0 2.76s 156 11 919

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