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Anthropic: Claude Opus 4.8 vs Google: Gemini 3.1 Pro Preview

Summary

Claude Opus 4.8 vs Gemini 3.1 Pro Preview benchmark comparison: Gemini 3.1 Pro Preview leads on average score with 9.2 vs 7.7. Gemini 3.1 Pro Preview has the lower benchmark cost at $1.054 vs $1.270. Claude Opus 4.8 is faster at 10.83s vs 20.14s, with pass rates of 79.4% vs 90.5%.

Recommended model: Gemini 3.1 Pro Preview - It has the strongest score in this comparison (9.2) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-02

Metric Claude Opus 4.8 Claude Opus 4.8 low Release: 2026-05-28 Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19
Score 7.7 9.2
Rank #38 #7
Reliability 10.0 10.0
Consistency 8.8 10.0
Tests Correct
Attempt pass rate 79.4% 90.5%
Flaky tests 3 0
Total Runs 63 63
Cost per result 8.466 5.546
Total Cost $1.270 $1.054
Input Price $5.000 / 1M $2.000 / 1M
Output Price $25.000 / 1M $12.000 / 1M
Total Input Tokens 60,946 41,617
Output Tokens 31,771 1,977
Reasoning Tokens 6,831 78,896
Response Time (avg) 10.83s 20.14s
Response Time (max) 127.97s 88.68s
Response Time (total) 227.39s 281.92s

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

#7 Gemini 3.1 Pro Preview

medium
Cost
$0.115
Time
87.2s
Tokens
9,629 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 3.1 Pro Preview 10.0 10.0 100.0% 0 7.90s 498 112 3,218
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 3.1 Pro Preview 7.9 9.9 66.7% 0 40.17s 8,124 435 41,247
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 3.1 Pro Preview 9.5 10.0 100.0% 0 40.61s 17,240 432 9,281
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 3.1 Pro Preview 10.0 10.0 100.0% 0 7.72s 7,265 279 3,904
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 3.1 Pro Preview 7.7 10.0 66.7% 0 32.73s 635 18 12,424
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 3.1 Pro Preview 10.0 10.0 100.0% 0 11.77s 490 108 1,179
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 3.1 Pro Preview 10.0 10.0 100.0% 0 9.56s 621 72 2,236
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 3.1 Pro Preview 10.0 10.0 100.0% 0 6.90s 570 235 3,128
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 3.1 Pro Preview 10.0 10.0 100.0% 0 23.15s 6,018 274 982
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 3.1 Pro Preview 10.0 10.0 100.0% 0 6.27s 156 12 1,297

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