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GPT-5.6 Terra vs GPT-5 Nano (medium)

The average score is effectively tied at 6.0 vs 6.0. GPT-5 Nano (medium) has the lower benchmark cost at $0.118 vs $0.140. GPT-5.6 Terra is faster at 1.66s vs 54.20s, with pass rates of 42.4% vs 54.5%.

Last updated at: 2026-08-15

Rank
#182
Total Output Tokens
6,221
Response Time (avg)
1.66s
Total Cost
$0.140
Rank
#184
Total Output Tokens
282,437
Response Time (avg)
54.20s
Total Cost
$0.118
Recommended model GPT-5.6 Terra

It has the best score here (6.0), while responding about 32.6x faster than GPT-5 Nano (medium).

Detailed comparison

Metric GPT-5.6 Terra GPT-5.6 Terra none Release: 2026-07-09 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 6.0 6.0
Rank #182 #184
Reliability 10.0 10.0
Consistency 8.9 6.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 42.4% 54.5%
Flaky tests 3 9
Total Runs 66 66
Cost per result 4.356 1.472
Total Cost $0.140 $0.118
Input Price $1.000 / 1M $0.050 / 1M
Output Price $6.000 / 1M $0.400 / 1M
Total Input Tokens 102,268 94,944
Output Tokens 6,221 12,037
Reasoning Tokens 0 270,400
Response Time (avg) 1.66s 54.20s
Response Time (max) 10.07s 227.89s
Response Time (total) 36.54s 867.23s
Parameters ~1T total (~60B active) ~120B total (~5B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#182 GPT-5.6 Terra

none
Cost
$0.030
Time
14.7s
Tokens
2,082 tok

#184 GPT-5 Nano

medium
Cost
$0.006
Time
108.5s
Tokens
13,209 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-5.6 Terra 5.5 10.0 33.3% 0 1.00s 7,302 336 0
GPT-5 Nano 7.0 7.7 55.6% 1 41.62s 7,305 740 41,152

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