Models / Claude Sonnet 5

Anthropic

Claude Sonnet 5

28 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
Anthropic
Sources
2
Our benchmarks
0
Price
Not yet published

Reported by others

Reported by Arena (formerly LMArena)
0.01
Confirmed task success · rank 15 of 46
Unit
IPS effect estimate, higher is better
Range
-0.02 to 0.04
Sample
21948 observations
Configuration
Claude Sonnet 5
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)
0.09
Praise over complaint · rank 3 of 46
Unit
IPS effect estimate, higher is better
Range
0.04 to 0.15
Sample
6780 observations
Configuration
Claude Sonnet 5
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)
0.07
Steerability · rank 1 of 46
Unit
IPS effect estimate, higher is better
Range
0.04 to 0.11
Sample
22508 observations
Configuration
Claude Sonnet 5
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 24 of 46
Unit
IPS effect estimate, higher is better
Range
0.00 to 0.00
Sample
3169153 observations
Configuration
Claude Sonnet 5
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)
1,476
Overall · rank 6 of 44
Unit
Arena rating, higher is better
Range
1,468 to 1,483
Sample
7411 votes
Configuration
Claude Sonnet 5 (high)
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)
1,196
Overall · rank 6 of 34
Unit
Arena rating, higher is better
Range
1,189 to 1,203
Sample
40230 votes
Configuration
Claude Sonnet 5
Measured
24 Aug 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)
1,452
Overall · rank 46 of 177
Unit
Arena rating, higher is better
Range
1,448 to 1,455
Sample
42969 votes
Configuration
Claude Sonnet 5 (high)
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)
1,465
Business, management and finance · rank 22 of 402
Unit
Arena rating, higher is better
Range
1,458 to 1,472
Sample
8542 votes
Configuration
Claude Sonnet 5 (high)
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)
1,435
Creative writing · rank 35 of 407
Unit
Arena rating, higher is better
Range
1,427 to 1,442
Sample
8600 votes
Configuration
Claude Sonnet 5 (high)
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)
1,512
Expert prompts · rank 9 of 359
Unit
Arena rating, higher is better
Range
1,503 to 1,521
Sample
4910 votes
Configuration
Claude Sonnet 5 (high)
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)
1,467
Instruction following · rank 18 of 409
Unit
Arena rating, higher is better
Range
1,461 to 1,473
Sample
15428 votes
Configuration
Claude Sonnet 5 (high)
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
Overall · rank 44 of 409
Unit
Arena rating, higher is better
Range
1,457 to 1,466
Sample
43340 votes
Configuration
Claude Sonnet 5 (high)
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)
1,452
Writing, literature and language · rank 27 of 408
Unit
Arena rating, higher is better
Range
1,446 to 1,459
Sample
11604 votes
Configuration
Claude Sonnet 5 (high)
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
3.0%
Requested-length error · rank 18 of 370
Unit
% off the requested word count, lower is better
Configuration
Claude Sonnet 5 (high)
Measured
30 Jun 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
3.0%
Requested-length error · rank 18 of 370
Unit
% off the requested word count, lower is better
Configuration
claude-sonnet-5
Measured
30 Jun 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
6.0%
Requested-length error · rank 41 of 370
Unit
% off the requested word count, lower is better
Configuration
claude-sonnet-5
Measured
30 Jun 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
3.0%
Requested-length error · rank 18 of 370
Unit
% off the requested word count, lower is better
Configuration
claude-sonnet-5
Measured
30 Jun 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
7.0%
Requested-length error · rank 48 of 370
Unit
% off the requested word count, lower is better
Configuration
claude-sonnet-5
Measured
30 Jun 2026
Not shown
Not other format limits such as character counts or bullet counts.
Reported by UGI Leaderboard
0.37
Style adherence · rank 90 of 370
Unit
score from 0 to 1, higher is better
Configuration
Claude Sonnet 5 (high)
Measured
30 Jun 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
0.35
Style adherence · rank 158 of 370
Unit
score from 0 to 1, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
0.37
Style adherence · rank 104 of 370
Unit
score from 0 to 1, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 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 78 of 370
Unit
score from 0 to 1, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 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 67 of 370
Unit
score from 0 to 1, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 2026
Not shown
Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.
Reported by UGI Leaderboard
56.8
Writing score · rank 121 of 370
Unit
score out of 100, higher is better
Configuration
Claude Sonnet 5 (high)
Measured
30 Jun 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
53.0
Writing score · rank 141 of 370
Unit
score out of 100, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 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
62.7
Writing score · rank 85 of 370
Unit
score out of 100, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 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
52.4
Writing score · rank 144 of 370
Unit
score out of 100, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 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
58.5
Writing score · rank 110 of 370
Unit
score out of 100, higher is better
Configuration
claude-sonnet-5
Measured
30 Jun 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.

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