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GPT-5.5 (low) vs GPT-6.1 Terra (max)

The average score is effectively tied at 9.5 vs 9.4. GPT-5.5 (low) has the lower benchmark cost at $1.822 vs $2.209. GPT-5.5 (low) is faster at 11.91s vs 66.42s, with pass rates of 87.0% vs 89.9%.

Last updated at: 2026-10-26

Compared models

Rank
#25
Total Output Tokens
31,065
Response Time (avg)
11.91s
Total Cost
$1.822
Rank
#27
Total Output Tokens
391,441
Response Time (avg)
66.42s
Total Cost
$2.209
Recommended model GPT-5.5 (low)

It has the best score here (9.5), while responding about 5.6x faster than GPT-6.1 Terra (max).

Detailed comparison

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GPT-6.1 Terra GPT-6.1 Terra max Release: 2026-10-26
Score 9.5 9.4
Rank #25 #27
Reliability 10.0 10.0
Consistency 10.0 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 87.0% 89.9%
Flaky tests 0 3
Total Runs 69 69
Cost per result 9.109 11.623
Total Cost $1.822 $2.209
Input Price $5.000 / 1M $1.000 / 1M
Output Price $30.000 / 1M $5.000 / 1M
Cache Read Price $0.500 / 1M $0.050 / 1M
Cache Write Price N/A $1.250 / 1M
Total Input Tokens 177,939 250,989
Output Tokens 6,283 5,610
Reasoning Tokens 24,782 385,831
Response Time (avg) 11.91s 66.42s
Response Time (max) 56.19s 723.45s
Response Time (total) 273.82s 1527.58s
Parameters ~1.5T total (~100B active) ~1T total (~60B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#25 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 tok

#27 GPT-6.1 Terra

max
Cost
$0.183
Time
406.4s
Tokens
36,629 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
GPT-6.1 Terra 10.0 10.0 100.0% 0 44.32s 7,302 390 34,227

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