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Google: Gemini 3.5 Flash vs OpenAI: GPT-5.6 Terra

Summary

Gemini 3.5 Flash (medium) vs GPT-5.6 Terra (high) benchmark comparison: Gemini 3.5 Flash (medium) leads on average score with 9.1 vs 8.2. Gemini 3.5 Flash (medium) has the lower benchmark cost at $0.582 vs $0.852. Gemini 3.5 Flash (medium) is faster at 4.94s vs 10.89s, with pass rates of 87.3% vs 68.3%.

Recommended model: Gemini 3.5 Flash (medium) - It has the best score here (9.1), while responding about 2.2x faster than GPT-5.6 Terra (high).

Last updated at: 2026-07-09

Metric Gemini 3.5 Flash Gemini 3.5 Flash medium Release: 2026-05-19 GPT-5.6 Terra GPT-5.6 Terra high Release: 2026-07-09
Score 9.1 8.2
Rank #11 #29
Reliability 10.0 10.0
Consistency 9.6 9.6
Tests Correct
Attempt pass rate 87.3% 68.3%
Flaky tests 1 1
Total Runs 63 63
Cost per result 3.229 6.086
Total Cost $0.582 $0.852
Input Price $1.500 / 1M $2.500 / 1M
Output Price $9.000 / 1M $15.000 / 1M
Total Input Tokens 36,936 34,218
Output Tokens 2,001 1,908
Reasoning Tokens 56,408 49,189
Response Time (avg) 4.94s 10.89s
Response Time (max) 18.07s 91.49s
Response Time (total) 103.79s 228.65s

Generation showcase

Hamster playing table tennis

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

#11 Gemini 3.5 Flash

medium
Cost
$0.201
Time
112.9s
Tokens
22,371 tok

#29 GPT-5.6 Terra

high
Cost
$0.055
Time
30.2s
Tokens
3,748 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
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.09s 492 171 3,385
GPT-5.6 Terra 8.3 10.0 75.0% 0 2.54s 606 158 700
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.9 7.5 77.8% 1 12.63s 8,118 461 24,939
GPT-5.6 Terra 7.6 7.2 77.8% 1 9.14s 7,302 370 6,087
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 12.05s 12,873 351 7,807
GPT-5.6 Terra 10.0 10.0 100.0% 0 6.94s 11,019 314 627
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 4.07s 7,548 279 3,784
GPT-5.6 Terra 10.0 10.0 100.0% 0 938ms 7,140 222 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.7 10.0 66.7% 0 5.24s 633 12 8,047
GPT-5.6 Terra 5.3 10.0 33.3% 0 43.44s 723 70 32,942
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.52s 486 115 1,144
GPT-5.6 Terra 5.1 10.0 0.0% 0 3.03s 477 113 216
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 9.9 10.0 100.0% 0 2.70s 615 71 2,855
GPT-5.6 Terra 10.0 10.0 100.0% 0 2.14s 660 96 319
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.7 10.0 66.7% 0 2.38s 558 295 2,747
GPT-5.6 Terra 7.7 10.0 66.7% 0 5.45s 642 277 2,613
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.81s 5,457 234 455
GPT-5.6 Terra 10.0 10.0 100.0% 0 4.97s 5,454 258 168
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.75s 156 12 1,245
GPT-5.6 Terra 3.0 10.0 0.0% 0 23.30s 195 30 5,517

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