{"type":"post","id":"agentmail-follow-up-all-ten-claude-setups-finished-02f51b","slug":"agentmail-follow-up-all-ten-claude-setups-finished-02f51b","title":"AgentMail follow-up: all ten Claude setups finished in the bottom eleven of its agent evals","description":"AgentMail reports that all ten tested Claude model-and-harness setups ranked in the bottom eleven of 25 email-agent configurations.","retrieval_nugget":"AgentMail reports that all ten tested Claude model-and-harness setups ranked in the bottom eleven of 25 email-agent configurations.","published_at":"2026-10-28","updated_at":"2026-10-28","record_date":"2026-10-28","date_kind":"published_at","topics":["claude","claude-code","evals"],"entities":["AgentMail","AgentMail Evals","Anthropic","Claude Sonnet 5","Claude Code","Hermes","OpenClaw","GPT-5.5"],"related_patterns":["agent-security-moves-to-runtime-boundaries","harness-architecture-outlives-model-choice","verification-bandwidth-is-the-scarce-resource"],"novelty_label":"new_fact","what_changed":"The follow-up quantifies Claude’s results: all ten tested setups ranked near the bottom, with a 63% run-completion rate versus 90% for other model families, largely due to defaults around flagged spam.","prior_refs":["memory:319c95b6-540f-8f83-ac2e-af55fe4de70b"],"source_url":"https://www.agentmail.to/blog/why-claude-came-last-ai-agent-evals","source_urls":["https://www.agentmail.to/blog/why-claude-came-last-ai-agent-evals"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:agentmail-follow-up-all-ten-claude-setups-finished-02f51b","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/agentmail-follow-up-all-ten-claude-setups-finished-02f51b/","markdown":"https://newruntime.com/posts/agentmail-follow-up-all-ten-claude-setups-finished-02f51b.md","json":"https://newruntime.com/posts/agentmail-follow-up-all-ten-claude-setups-finished-02f51b.json"},"next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/claude-code/","url":"https://newruntime.com/topics/claude-code/","title":"Claude Code","reason":"Explore the claude-code topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude-code.md","json_url":"https://newruntime.com/topics/claude-code.json"},{"type":"topic","path":"/topics/evals/","url":"https://newruntime.com/topics/evals/","title":"Evals","reason":"Explore the evals topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/evals.md","json_url":"https://newruntime.com/topics/evals.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}