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OpenAI: GPT-5.4 vs OpenAI: GPT-5.6 Terra

GPT-5.6 Terra leads on average score with 6.0 vs 5.8. GPT-5.6 Terra has the lower benchmark cost at $0.349 vs $0.397. GPT-5.6 Terra is faster at 1.65s vs 2.07s, with pass rates of 34.9% vs 42.4%.

Recommended modelGPT-5.6 TerraIt has the strongest score in this comparison (6.0) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-18

Metric GPT-5.4 GPT-5.4 none Release: 2026-03-05 GPT-5.6 Terra GPT-5.6 Terra none Release: 2026-07-09
Score 5.8 6.0
Rank #135 #128
Reliability 10.0 10.0
Consistency 9.2 8.9
Tests Correct
Attempt pass rate 34.9% 42.4%
Flaky tests 2 3
Total Runs 66 66
Cost per result 5.663 4.359
Total Cost $0.397 $0.349
Input Price $2.500 / 1M $2.500 / 1M
Output Price $15.000 / 1M $15.000 / 1M
Total Input Tokens 108,632 102,259
Output Tokens 8,321 6,203
Reasoning Tokens 0 0
Response Time (avg) 2.07s 1.65s
Response Time (max) 15.63s 10.07s
Response Time (total) 45.51s 36.28s

Hamster playing table tennis

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

#135 GPT-5.4

none
Cost
$0.026
Time
18.1s
Tokens
1,792 tok

#128 GPT-5.6 Terra

none
Cost
$0.030
Time
14.7s
Tokens
2,082 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.4 5.5 10.0 33.3% 0 1.62s 7,305 516 0
GPT-5.6 Terra 5.5 10.0 33.3% 0 1.00s 7,302 336 0

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