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GPT-5.6 Terra (high) vs GPT-6 Luna (high)

GPT-5.6 Terra (high) leads on average score with 8.3 vs 7.7. GPT-6 Luna (high) has the lower benchmark cost at $0.074 vs $0.698. GPT-5.6 Terra (high) is faster at 13.62s vs 20.37s, with pass rates of 69.6% vs 73.9%.

Last updated at: 2026-11-10

Compared models

Rank
#114
Total Output Tokens
60,065
Response Time (avg)
13.62s
Total Cost
$0.698
Rank
#162
Total Output Tokens
101,587
Response Time (avg)
20.37s
Total Cost
$0.074
Recommended model GPT-6 Luna (high)

Its score stays close to the best score here (7.7 vs 8.3), while costing about 9.5x less than GPT-5.6 Terra (high).

Detailed comparison

Metric GPT-5.6 Terra GPT-5.6 Terra high Release: 2026-07-09 GPT-6 Luna GPT-6 Luna high Release: 2026-09-23
Score 8.3 7.7
Rank #114 #162
Reliability 10.0 10.0
Consistency 9.4 8.7
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 69.6% 73.9%
Flaky tests 2 4
Total Runs 69 69
Cost per result 8.674 0.492
Total Cost $0.698 $0.074
Input Price $2.000 / 1M $0.100 / 1M
Output Price $12.000 / 1M $0.500 / 1M
Cache Read Price $0.200 / 1M $0.010 / 1M
Cache Write Price $2.500 / 1M $0.125 / 1M
Total Input Tokens 197,239 229,986
Output Tokens 6,083 6,037
Reasoning Tokens 53,982 95,550
Response Time (avg) 13.62s 20.37s
Response Time (max) 91.49s 106.93s
Response Time (total) 313.21s 468.52s
Parameters ~1T total (~60B active) ~400B total (~17B 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.

#114 GPT-5.6 Terra

high
Cost
$0.055
Time
30.2s
Tokens
3,748 tok

#162 GPT-6 Luna

high
Cost
$0.003
Time
49.2s
Tokens
5,231 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 7.6 7.2 77.8% 1 9.14s 7,302 370 6,087
GPT-6 Luna 7.8 7.4 77.8% 1 24.69s 7,302 483 15,691

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