Models / Claude Fable 5

Anthropic

Claude Fable 5

36 published results from 4 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: 4
Our benchmarks: 0
Price: Not yet published

Reported by others

Reported by Arena (formerly LMArena)

0.03

Confirmed task success · rank 12 of 46

Unit: IPS effect estimate, higher is better
Range: 0.01 to 0.06
Sample: 31532 observations
Configuration: Claude Fable 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)

0.17

Praise over complaint · rank 3 of 46

Unit: IPS effect estimate, higher is better
Range: 0.12 to 0.21
Sample: 10471 observations
Configuration: Claude Fable 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)

0.11

Steerability · rank 1 of 46

Unit: IPS effect estimate, higher is better
Range: 0.09 to 0.14
Sample: 32795 observations
Configuration: Claude Fable 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: 2120388 observations
Configuration: Claude Fable 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

Overall · rank 1 of 44

Unit: Arena rating, higher is better
Range: 1,491 to 1,507
Sample: 8497 votes
Configuration: Claude Fable 5
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)

1,229

Overall · rank 2 of 34

Unit: Arena rating, higher is better
Range: 1,221 to 1,237
Sample: 41795 votes
Configuration: Claude Fable 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)

1,483

Overall · rank 3 of 177

Unit: Arena rating, higher is better
Range: 1,480 to 1,487
Sample: 36148 votes
Configuration: Claude Fable 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)

1,503

Business, management and finance · rank 1 of 402

Unit: Arena rating, higher is better
Range: 1,496 to 1,511
Sample: 7467 votes
Configuration: Claude Fable 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)

1,501

Creative writing · rank 1 of 407

Unit: Arena rating, higher is better
Range: 1,493 to 1,509
Sample: 7516 votes
Configuration: Claude Fable 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)

1,550

Expert prompts · rank 1 of 359

Unit: Arena rating, higher is better
Range: 1,540 to 1,560
Sample: 4088 votes
Configuration: Claude Fable 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

Instruction following · rank 1 of 409

Unit: Arena rating, higher is better
Range: 1,503 to 1,515
Sample: 13049 votes
Configuration: Claude Fable 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)

1,504

Overall · rank 1 of 409

Unit: Arena rating, higher is better
Range: 1,499 to 1,508
Sample: 36462 votes
Configuration: Claude Fable 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)

1,508

Writing, literature and language · rank 1 of 408

Unit: Arena rating, higher is better
Range: 1,501 to 1,515
Sample: 9956 votes
Configuration: Claude Fable 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 OpenHands Index

81.0%

Average · rank 1 of 34

Unit: % resolved, higher is better
Configuration: claude-fable-5
Measured: 30 Jun 2026
Not shown: Not the model alone: the score is for the model inside the OpenHands agent, at the SDK version shown.

Reported by OpenHands Index

70.6%

Front end (SWE-Bench Multimodal) · rank 1 of 34

Unit: % resolved, higher is better
Configuration: claude-fable-5
Measured: 30 Jun 2026
Not shown: Not the model alone: the score is for the model inside the OpenHands agent, at the SDK version shown.

Reported by OpenHands Index

62.5%

Greenfield (Commit0) · rank 1 of 34

Unit: % resolved, higher is better
Configuration: claude-fable-5
Measured: 30 Jun 2026
Not shown: Not the model alone: the score is for the model inside the OpenHands agent, at the SDK version shown.

Reported by OpenHands Index

84.2%

Information gathering (GAIA) · rank 2 of 34

Unit: % resolved, higher is better
Configuration: claude-fable-5
Measured: 30 Jun 2026
Not shown: Not the model alone: the score is for the model inside the OpenHands agent, at the SDK version shown.

Reported by OpenHands Index

95.8%

Issue resolution (SWE-Bench) · rank 1 of 34

Unit: % resolved, higher is better
Configuration: claude-fable-5
Measured: 30 Jun 2026
Not shown: Not the model alone: the score is for the model inside the OpenHands agent, at the SDK version shown.

Reported by OpenHands Index

91.9%

Testing (SWT-Bench) · rank 1 of 34

Unit: % resolved, higher is better
Configuration: claude-fable-5
Measured: 30 Jun 2026
Not shown: Not the model alone: the score is for the model inside the OpenHands agent, at the SDK version shown.

Reported by tau2-bench

28.9%

Consistency (pass^4) · rank 5 of 21

Unit: % of tasks, higher is better
Configuration: claude-fable-5
Measured: 23 Jul 2026
Not shown: Not your policies or customers: the tasks and policies are tau2's own, and the customer is simulated by gpt-5.2.

Reported by tau2-bench

39.7%

Task success (pass^1) · rank 8 of 21

Unit: % of tasks, higher is better
Configuration: claude-fable-5
Measured: 23 Jul 2026
Not shown: Not your policies or customers: the tasks and policies are tau2's own, and the customer is simulated by gpt-5.2.

Reported by UGI Leaderboard

2.0%