Developer Tools
Why Coding Agents Forget the Goal After Dozens of Tool Calls
Why coding agents forget the goal, repeat failed fixes, and skip tests—and how to recover with a task-state record, regression checks, and a bounded restart.
ReadTag: #fable-5-1
Developer Tools
Fable 5.1 Long-Running Agents: Tests, Recovery and Cost
SandBase's Fable 5.1 evaluation design: test a billing-client upgrade across two repositories, recover from tool failures, cap retries, and count accepted-task cost.
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Model Comparison
Fable 5.1 vs Mythos 5.1: Pricing, Limits and Access
SandBase compares Fable 5.1 and Mythos 5.1 access, API pricing, fallback and retention. Learn why a Fable API account does not grant Mythos research permissions.
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Industry Insights
Claude for Science: Venus Maps, Protein Design and GPUs
Examine Fable 5.1 and Mythos 5.1 research cases: Venus mapping, lab-tested protein binders, and GPU kernel speedups, with methods and evidence limits.
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Agent Daily News
Claude Fable 5.1 Released: Revisiting the EAP Rumors
Claude Fable 5.1 launched on September 1. Revisit the EAP names, Claude Web routing rumors, and evidence that could not establish a model's identity.
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