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Google: Gemini 3 Flash Preview vs OpenAI: GPT-5.6 Terra

Summary

Gemini 3 Flash Preview (medium) vs GPT-5.6 Terra (medium) benchmark comparison: Gemini 3 Flash Preview (medium) leads on average score with 9.6 vs 7.8. GPT-5.6 Terra (medium) has the lower benchmark cost at $0.496 vs $0.667. GPT-5.6 Terra (medium) is faster at 6.69s vs 18.64s, with pass rates of 98.4% vs 68.3%.

Recommended model: Gemini 3 Flash Preview (medium) - It has the strongest score in this comparison (9.6) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-09

Metric Gemini 3 Flash Preview Gemini 3 Flash Preview medium Release: 2025-12-17 GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09
Score 9.6 7.8
Rank #2 #37
Reliability 10.0 10.0
Consistency 9.7 9.2
Tests Correct
Attempt pass rate 98.4% 68.3%
Flaky tests 1 2
Total Runs 63 63
Cost per result 3.335 3.815
Total Cost $0.667 $0.496
Input Price $0.500 / 1M $2.500 / 1M
Output Price $3.000 / 1M $15.000 / 1M
Total Input Tokens 37,017 34,218
Output Tokens 2,006 1,982
Reasoning Tokens 214,153 25,370
Response Time (avg) 18.64s 6.69s
Response Time (max) 117.26s 41.68s
Response Time (total) 391.35s 140.49s

Generation showcase

Hamster playing table tennis

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

#2 Gemini 3 Flash Preview

medium
Cost
$0.010
Time
17.9s
Tokens
3,236 tok

#37 GPT-5.6 Terra

medium
Cost
$0.035
Time
16.3s
Tokens
2,418 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 Flash Preview 10.0 10.0 100.0% 0 3.88s 494 330 3,216
GPT-5.6 Terra 8.3 10.0 75.0% 0 2.22s 606 172 657
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 8.6 7.6 88.9% 1 84.40s 8,122 462 161,084
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 22.42s 12,873 351 10,485
GPT-5.6 Terra 10.0 10.0 100.0% 0 6.26s 11,019 316 540
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.43s 7,548 279 4,893
GPT-5.6 Terra 10.0 10.0 100.0% 0 872ms 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 Flash Preview 10.0 10.0 100.0% 0 15.27s 633 12 21,684
GPT-5.6 Terra 5.3 10.0 33.3% 0 23.45s 723 70 15,327
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.19s 486 72 1,905
GPT-5.6 Terra 5.5 10.0 0.0% 0 2.37s 477 133 144
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.04s 615 72 2,709
GPT-5.6 Terra 10.0 10.0 100.0% 0 1.43s 660 89 261
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.05s 558 183 4,365
GPT-5.6 Terra 8.4 7.4 88.9% 1 3.78s 642 272 1,462
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 12.60s 5,532 234 1,487
GPT-5.6 Terra 10.0 10.0 100.0% 0 5.09s 5,454 254 246
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.50s 156 11 2,325
GPT-5.6 Terra 3.0 10.0 0.0% 0 10.05s 195 27 2,206

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