Models / claude-fable-5-1

Claude Fable 5.1

Anthropic's model, with closed weights. Forcebench has run it in 1 configuration on the API board. API is models reached through a hosted service; Local, models served on Forcebench’s own hardware.

On the API board

Models reached through a hosted service. Claude Fable 5.1 is ranked by its one configuration: the joint eighth-highest score of 26 models, not clearly different from 9 other models. Scores are within 3 attempts (c@3) with 95% intervals; each configuration is compared with the highest-scoring one by whether their 95% intervals overlap. Every configuration on the board → Cost and speed →

88%
within 3 attempts (c@3), 95% CI 85–91 · high · joint eighth-highest score of 26 models, not clearly different from 9 other models
2.1k
output tokens per task · median 1.2k, p90 4.9k
18 s
median per task, every attempt counted, including network and queueing · 90th percentile 63 s
9%
no answer within the 32,768-token budget
$0.15
per task at the list price of 10 October 2026, every attempt counted
$0.17
per solved task: the total cost over the tasks solved · cost and speed
Every configuration of Claude Fable 5.1 on the API board
ConfigurationRank all configsWithin 3 attempts c@3 · 95% CITokens mean · median · p90No answerLatency median per task, every attempt countedCost per taskCost per solved task
Anthropic · highhighest score12
88%95% CI 85–91
2.1k1.2k · 4.9k9%18 s$0.15$0.17
Suites, at its highest-scoring configuration
high · Anthropic: within 3 attempts (c@3) on each suite with 95% intervals, against the median of the API board's models, each at its highest-scoring configuration.
  • 95% interval
  • API board median
Apex
100%, 95% interval 84–100%
Salesforce APIs
39%, 95% interval 20–61%
CI/CD
94%, 95% interval 73–99%
Salesforce CLI
85%, 95% interval 64–95%
Salesforce docs
59%, 95% interval 36–78%
fflib Enterprise Patterns
100%, 95% interval 82–100%
Flow
100%, 95% interval 82–100%
Governor limits & pushback
100%, 95% interval 83–100%
Lightning Web Components
100%, 95% interval 82–100%
Nonprofit Success Pack
94%, 95% interval 74–99%
Packaging
83%, 95% interval 61–94%
Permissions & access
93%, 95% interval 70–99%
Scratch org definitions
83%, 95% interval 61–94%
SOQL
95%, 95% interval 76–99%
Trigger Actions Framework
94%, 95% interval 74–99%
    Show the numbers
    Per-suite scores of Claude Fable 5.1's highest-scoring configuration on the API board, with the board's median
    Suitec@3 95% CIAPI medianTasks
    Apex
    100%95% CI 84–100
    		90%20
    Salesforce APIs
    39%95% CI 20–61
    		72%18
    CI/CD
    94%95% CI 73–99
    		88%17
    Salesforce CLI
    85%95% CI 64–95
    		90%20
    Salesforce docs
    59%95% CI 36–78
    		29%17
    fflib Enterprise Patterns
    100%95% CI 82–100
    		61%18
    Flow
    100%95% CI 82–100
    		69%18
    Governor limits & pushback
    100%95% CI 83–100
    		89%19
    Lightning Web Components
    100%95% CI 82–100
    		100%18
    Nonprofit Success Pack
    94%95% CI 74–99
    		81%18
    Packaging
    83%95% CI 61–94
    		69%18
    Permissions & access
    93%95% CI 70–99
    		87%15
    Scratch org definitions
    83%95% CI 61–94
    		50%18
    SOQL
    95%95% CI 76–99
    		100%20
    Trigger Actions Framework
    94%95% CI 74–99
    		86%18

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