Models / GPT-5.6 Terra

OpenAI

GPT-5.6 Terra

27 published results from 2 sources. Each card shows where the number comes from and what it does not measure. Results are never combined into one score.

Provider
OpenAI
Sources
2
Our benchmarks
0
Price
Not yet published

Reported by others

Reported by Arena (formerly LMArena)
-0.06
Confirmed task success · rank 27 of 46
Unit
IPS effect estimate, higher is better
Range
-0.09 to -0.04
Sample
17546 observations
Configuration
GPT-5.6 Terra
Measured
28 Sep 2026
Not shown
Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
0.03
Praise over complaint · rank 10 of 46
Unit
IPS effect estimate, higher is better
Range
-0.01 to 0.06
Sample
6580 observations
Configuration
GPT-5.6 Terra
Measured
28 Sep 2026
Not shown
Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
0.04
Steerability · rank 6 of 46
Unit
IPS effect estimate, higher is better
Range
0.02 to 0.06
Sample
22955 observations
Configuration
GPT-5.6 Terra
Measured
28 Sep 2026
Not shown
Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
0.00
Tool grounding · rank 1 of 46
Unit
IPS effect estimate, higher is better
Range
0.00 to 0.00
Sample
1322991 observations
Configuration
GPT-5.6 Terra
Measured
28 Sep 2026
Not shown
Not a success rate: the estimated effect of choosing this model as the agent's orchestrator, against an even mix of the models tested, inside Arena's own harness.
Reported by Arena (formerly LMArena)
1,477
Overall · rank 6 of 44
Unit
Arena rating, higher is better
Range
1,468 to 1,485
Sample
5787 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
13 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,467
Overall · rank 23 of 177
Unit
Arena rating, higher is better
Range
1,463 to 1,470
Sample
34999 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not an error rate: claims that cannot be checked on the web are skipped, and preference still carries most of the weight.
Reported by Arena (formerly LMArena)
1,466
Business, management and finance · rank 20 of 402
Unit
Arena rating, higher is better
Range
1,458 to 1,474
Sample
6719 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,428
Creative writing · rank 47 of 407
Unit
Arena rating, higher is better
Range
1,420 to 1,436
Sample
7285 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,504
Expert prompts · rank 13 of 359
Unit
Arena rating, higher is better
Range
1,494 to 1,514
Sample
4170 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,462
Instruction following · rank 24 of 409
Unit
Arena rating, higher is better
Range
1,455 to 1,468
Sample
12681 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,465
Overall · rank 36 of 409
Unit
Arena rating, higher is better
Range
1,461 to 1,469
Sample
35323 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by Arena (formerly LMArena)
1,445
Writing, literature and language · rank 35 of 408
Unit
Arena rating, higher is better
Range
1,438 to 1,452
Sample
9613 votes
Configuration
GPT-5.6 Terra (xhigh)
Measured
25 Sep 2026
Not shown
Not accuracy or correctness: it ranks which answer voters preferred, with answer length and formatting controlled for.
Reported by UGI Leaderboard
31.0%
Requested-length error · rank 258 of 370
Unit
% off the requested word count, lower is better
Configuration
GPT-5.6 Terra (high reasoning)
Measured
9 Jul 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
35.0%
Requested-length error · rank 277 of 370
Unit
% off the requested word count, lower is better
Configuration
GPT-5.6 Terra (low reasoning)
Measured
9 Jul 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
31.0%
Requested-length error · rank 258 of 370
Unit
% off the requested word count, lower is better
Configuration
GPT-5.6 Terra (medium reasoning)
Measured
9 Jul 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
42.0%
Requested-length error · rank 295 of 370
Unit
% off the requested word count, lower is better
Configuration
GPT-5.6 Terra (no reasoning)
Measured
9 Jul 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
22.0%
Requested-length error · rank 202 of 370
Unit
% off the requested word count, lower is better
Configuration
GPT-5.6 Terra (xhigh)
Measured
9 Jul 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
0.38
Style adherence · rank 57 of 370
Unit
score from 0 to 1, higher is better
Configuration
GPT-5.6 Terra (high reasoning)
Measured
9 Jul 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
0.39
Style adherence · rank 48 of 370
Unit
score from 0 to 1, higher is better
Configuration
GPT-5.6 Terra (low reasoning)
Measured
9 Jul 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
0.39
Style adherence · rank 43 of 370
Unit
score from 0 to 1, higher is better
Configuration
GPT-5.6 Terra (medium reasoning)
Measured
9 Jul 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
0.38
Style adherence · rank 71 of 370
Unit
score from 0 to 1, higher is better
Configuration
GPT-5.6 Terra (no reasoning)
Measured
9 Jul 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
0.39
Style adherence · rank 35 of 370
Unit
score from 0 to 1, higher is better
Configuration
GPT-5.6 Terra (xhigh)
Measured
9 Jul 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
60.4
Writing score · rank 97 of 370
Unit
score out of 100, higher is better
Configuration
GPT-5.6 Terra (high reasoning)
Measured
9 Jul 2026
Not shown
Not business copy quality: UGI's prompts are private and lean towards creative writing, and models that often refuse get no score.
Reported by UGI Leaderboard
56.8
Writing score · rank 120 of 370
Unit
score out of 100, higher is better
Configuration
GPT-5.6 Terra (low reasoning)
Measured
9 Jul 2026
Not shown
Not business copy quality: UGI's prompts are private and lean towards creative writing, and models that often refuse get no score.
Reported by UGI Leaderboard
58.8
Writing score · rank 107 of 370
Unit
score out of 100, higher is better
Configuration
GPT-5.6 Terra (medium reasoning)
Measured
9 Jul 2026
Not shown
Not business copy quality: UGI's prompts are private and lean towards creative writing, and models that often refuse get no score.
Reported by UGI Leaderboard
48.2
Writing score · rank 166 of 370
Unit
score out of 100, higher is better
Configuration
GPT-5.6 Terra (no reasoning)
Measured
9 Jul 2026
Not shown
Not business copy quality: UGI's prompts are private and lean towards creative writing, and models that often refuse get no score.
Reported by UGI Leaderboard
58.9
Writing score · rank 106 of 370
Unit
score out of 100, higher is better
Configuration
GPT-5.6 Terra (xhigh)
Measured
9 Jul 2026
Not shown
Not business copy quality: UGI's prompts are private and lean towards creative writing, and models that often refuse get no score.

Compare GPT-5.6 Terra with