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Models / Claude Opus 5.5

Anthropic

Claude Opus 5.5

47 published results from 5 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: 5
Our benchmarks: 3
Price: Not yet published

Measured by Spring Prompt

Measured by Spring Prompt · BulletBench

557

Ladder Elo · rank 2 of 16

Unit: ladder Elo, higher is better
Range: 370 to 727
Sample: 8 games
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 29 Sep 2026
Not shown: Not a business skill: chess against an engine on a real clock, used here as a speed-under-pressure signal.

Measured by Spring Prompt · BulletBench

7.5 s

Median move time · rank 12 of 16

Unit: milliseconds, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 29 Sep 2026
Not shown: Not general response speed: replies are one short move.

Measured by Spring Prompt · CatalogBench

96.6%

Content quality · rank 8 of 18

Unit: % of checks, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

0.0%

Failed outputs · rank 1 of 18

Unit: % of products, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not a provider outage: provider errors are retried before a product counts as failed.

Measured by Spring Prompt · CatalogBench

3.6%

Publish-ready listings · rank 9 of 18

Unit: % of products, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

0.0%

Reliably publish-ready · rank 10 of 18

Unit: % of products, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

4.36

Unsupported claims · rank 10 of 18

Unit: claims per product, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

100.0%

Channel compliance · rank 1 of 18

Unit: % of products, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

100.0%

Conflicts caught · rank 1 of 18

Unit: % of conflicts, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

97.2%

Content quality · rank 5 of 18

Unit: % of checks, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

$0.0400

Cost per product · rank 16 of 18

Unit: US dollars, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your cost: prices are those charged through OpenRouter on the run date.

Measured by Spring Prompt · CatalogBench

96.6%

Decision accuracy · rank 6 of 18

Unit: % of decisions, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

0.0%

Failed outputs · rank 1 of 18

Unit: % of products, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not a provider outage: provider errors are retried before a product counts as failed.

Measured by Spring Prompt · CatalogBench

92.2%

Field accuracy · rank 14 of 18

Unit: % of missing fields, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

0.5%

Invented values · rank 4 of 18

Unit: % of filled values, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

58.3%

Publish-ready listings · rank 6 of 18

Unit: % of products, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

39.3%

Reliably publish-ready · rank 6 of 18

Unit: % of products, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · CatalogBench

0.83

Unsupported claims · rank 8 of 18

Unit: claims per product, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 30 Sep 2026
Not shown: Not your catalogue: invented products with generated images, so a model's result on your own feed can differ.

Measured by Spring Prompt · ROASBench

$1.06

Cost of a run · rank 15 of 17

Unit: US dollars, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 29 Sep 2026
Not shown: Not your cost: prices are those charged through OpenRouter on the run date.

Measured by Spring Prompt · ROASBench

0

Months over budget · rank 1 of 17

Unit: months of 12, lower is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 29 Sep 2026
Not shown: Not real ad performance: the market is a deterministic simulation of one invented skincare brand.

Measured by Spring Prompt · ROASBench

51.6

Overall score · rank 5 of 17

Unit: score out of 100, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 29 Sep 2026
Not shown: Not real ad performance: the market is a deterministic simulation of one invented skincare brand.

Measured by Spring Prompt · ROASBench

£0.69

Return on ad spend · rank 2 of 17

Unit: profit per £1 spent, higher is better
Configuration: Claude Opus 5.5, provider default reasoning
Measured: 29 Sep 2026
Not shown: Not real ad performance: the market is a deterministic simulation of one invented skincare brand.

Reported by others

Reported by Arena (formerly LMArena)

0.16

Confirmed task success · rank 1 of 46

Unit: IPS effect estimate, higher is better
Range: 0.12 to 0.20
Sample: 3385 observations
Configuration: Claude Opus 5.5
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)

0.19

Praise over complaint · rank 1 of 46

Unit: IPS effect estimate, higher is better
Range: 0.12 to 0.27
Sample: 1149 observations
Configuration: Claude Opus 5.5
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)

0.14

Steerability · rank 1 of 46

Unit: IPS effect estimate, higher is better
Range: 0.10 to 0.18
Sample: 3699 observations
Configuration: Claude Opus 5.5
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 1 of 46

Unit: IPS effect estimate, higher is better
Range: 0.00 to 0.00
Sample: 814080 observations
Configuration: Claude Opus 5.5
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)

1,499

Business, management and finance · rank 1 of 402

Unit: Arena rating, higher is better
Range: 1,471 to 1,528
Sample: 436 votes
Configuration: Claude Opus 5.5 (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)

1,521

Creative writing · rank 1 of 407

Unit: Arena rating, higher is better
Range: 1,492 to 1,550
Sample: 487 votes
Configuration: Claude Opus 5.5 (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)

1,556

Expert prompts · rank 1 of 359

Unit: Arena rating, higher is better
Range: 1,522 to 1,591
Sample: 277 votes
Configuration: Claude Opus 5.5 (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)

1,516

Instruction following · rank 1 of 409

Unit: Arena rating, higher is better
Range: 1,496 to 1,537
Sample: 812 votes
Configuration: Claude Opus 5.5 (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)

1,509

Overall · rank 1 of 409

Unit: Arena rating, higher is better
Range: 1,496 to 1,521
Sample: 2307 votes
Configuration: Claude Opus 5.5 (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)

1,520

Writing, literature and language · rank 1 of 408

Unit: Arena rating, higher is better
Range: 1,496 to 1,544
Sample: 655 votes
Configuration: Claude Opus 5.5 (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

5.0%

Requested-length error · rank 34 of 370

Unit: % off the requested word count, lower is better
Configuration: Claude Opus 5.5 (high)
Measured: 23 Sep 2026
Not shown: Not other format limits such as character counts or bullet counts.

Reported by UGI Leaderboard

5.0%

Requested-length error · rank 34 of 370

Unit: % off the requested word count, lower is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not other format limits such as character counts or bullet counts.

Reported by UGI Leaderboard

2.0%

Requested-length error · rank 7 of 370

Unit: % off the requested word count, lower is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not other format limits such as character counts or bullet counts.

Reported by UGI Leaderboard

5.0%

Requested-length error · rank 34 of 370

Unit: % off the requested word count, lower is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not other format limits such as character counts or bullet counts.

Reported by UGI Leaderboard

5.0%

Requested-length error · rank 34 of 370

Unit: % off the requested word count, lower is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not other format limits such as character counts or bullet counts.

Reported by UGI Leaderboard

0.42

Style adherence · rank 4 of 370

Unit: score from 0 to 1, higher is better
Configuration: Claude Opus 5.5 (high)
Measured: 23 Sep 2026
Not shown: Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.

Reported by UGI Leaderboard

0.40

Style adherence · rank 22 of 370

Unit: score from 0 to 1, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.

Reported by UGI Leaderboard

0.43

Style adherence · rank 1 of 370

Unit: score from 0 to 1, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.

Reported by UGI Leaderboard

0.43

Style adherence · rank 2 of 370

Unit: score from 0 to 1, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.

Reported by UGI Leaderboard

0.42

Style adherence · rank 5 of 370

Unit: score from 0 to 1, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 2026
Not shown: Not brand voice on your own examples: UGI's prompts are private and lean towards creative writing.

Reported by UGI Leaderboard

68.4

Writing score · rank 35 of 370

Unit: score out of 100, higher is better
Configuration: Claude Opus 5.5 (high)
Measured: 23 Sep 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

70.0

Writing score · rank 22 of 370

Unit: score out of 100, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 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

68.9

Writing score · rank 31 of 370

Unit: score out of 100, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 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

69.8

Writing score · rank 24 of 370

Unit: score out of 100, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 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

69.4

Writing score · rank 28 of 370

Unit: score out of 100, higher is better
Configuration: claude-opus-5.5
Measured: 23 Sep 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 Claude Opus 5.5 with