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Compared models

GPT-5.6 Sol (medium) vs GPT-5.6 Terra (medium) vs GPT-5.6 Luna (medium) vs GPT-5.5 (medium) benchmark comparison: GPT-5.6 Sol (medium) leads on Score with 9.5. GPT-5.6 Sol (medium) leads on Reliability with 10.0. GPT-5.6 Luna (medium) has the lowest Total Cost at $0.065. GPT-5.6 Terra (medium) is fastest at 8.93s.

Last updated at: 2026-10-26

Compared models

Rank
#21
Total Output Tokens
38,005
Response Time (avg)
14.57s
Total Cost
$1.700
Rank
#111
Total Output Tokens
33,189
Response Time (avg)
8.93s
Total Cost
$0.483
Rank
#160
Total Output Tokens
47,986
Response Time (avg)
9.64s
Total Cost
$0.065
Rank
#38
Total Output Tokens
130,107
Response Time (avg)
39.86s
Total Cost
$4.809
Recommended model GPT-5.6 Sol (medium)

It has the strongest score in this comparison (9.5) and the best overall balance of cost and response time across 4 models.

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol medium Release: 2026-07-09 GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09 GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 9.5 8.2 7.4 9.2
Rank #21 #111 #160 #38
Reliability 10.0 10.0 10.0 10.0
Consistency 8.9 9.3 9.0 9.0
Attempts 69/69 69/69 69/69 69/69
Tests Correct
Attempt pass rate 91.3% 71.0% 62.3% 88.4%
Flaky tests 3 2 3 3
Total Runs 69 69 69 69
Cost per result 8.944 5.768 2.822 25.306
Total Cost $1.700 $0.483 $0.065 $4.809
Input Price $2.000 / 1M $2.000 / 1M $0.200 / 1M $5.000 / 1M
Output Price $10.000 / 1M $12.000 / 1M $1.200 / 1M $30.000 / 1M
Cache Read Price $0.200 / 1M $0.200 / 1M $0.020 / 1M $0.500 / 1M
Cache Write Price $2.500 / 1M $2.500 / 1M $0.250 / 1M N/A
Total Input Tokens 191,341 172,507 212,780 180,959
Output Tokens 5,665 5,824 6,849 6,472
Reasoning Tokens 32,340 27,365 41,137 123,635
Response Time (avg) 14.57s 8.93s 9.64s 39.86s
Response Time (max) 79.40s 54.74s 58.09s 332.10s
Response Time (total) 335.16s 205.39s 221.62s 916.82s
Parameters ~2T total (~150B active) ~1T total (~60B active) ~400B total (~17B active) ~1.5T total (~100B active)
Availability Closed Closed 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.

#21 GPT-5.6 Sol

medium
Cost
$0.124
Time
57.2s
Tokens
4,199 tok

#111 GPT-5.6 Terra

medium
Cost
$0.035
Time
16.3s
Tokens
2,418 tok

#160 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 tok

#38 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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 Sol 10.0 10.0 100.0% 0 9.40s 7,302 394 4,706
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527
GPT-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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