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GPT-5.6 Terra vs Qwen3.5 Plus 2026-04-20

Qwen3.5 Plus 2026-04-20 leads on average score with 6.1 vs 6.0. Qwen3.5 Plus 2026-04-20 has the lower benchmark cost at $0.122 vs $0.280. GPT-5.6 Terra is faster at 1.66s vs 13.10s, with pass rates of 42.4% vs 43.9%.

Last updated at: 2026-09-08

Compared models

Rank
#207
Total Output Tokens
6,221
Response Time (avg)
1.66s
Total Cost
$0.280
Rank
#202
Total Output Tokens
51,487
Response Time (avg)
13.10s
Total Cost
$0.122
Recommended model GPT-5.6 Terra

Its score stays close to the best score here (6.0 vs 6.1), while responding about 7.9x faster than Qwen3.5 Plus 2026-04-20.

Detailed comparison

Metric GPT-5.6 Terra GPT-5.6 Terra none Release: 2026-07-09 Qwen3.5 Plus 2026-04-20 Qwen3.5 Plus 2026-04-20 none Release: 2026-04-20
Score 6.0 6.1
Rank #207 #202
Reliability 10.0 10.0
Consistency 8.9 8.7
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 42.4% 43.9%
Flaky tests 3 4
Total Runs 66 66
Cost per result 4.356 1.636
Total Cost $0.280 $0.122
Input Price $2.000 / 1M $0.300 / 1M
Output Price $12.000 / 1M $1.800 / 1M
Total Input Tokens 102,268 94,477
Output Tokens 6,221 51,487
Reasoning Tokens 0 0
Response Time (avg) 1.66s 13.10s
Response Time (max) 10.07s 206.05s
Response Time (total) 36.54s 288.23s
Parameters ~1T total (~60B active) ~397B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#207 GPT-5.6 Terra

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

#202 Qwen3.5 Plus 2026-04-20

none
Cost
$0.008
Time
77.0s
Tokens
4,369 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
Qwen3.5 Plus 2026-04-20 3.9 7.8 11.1% 1 1.69s 7,913 480 0

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