Unverified50% confidenceFactExact time
The developer's Agent was connected to Slack, Notion, HubSpot and internal APIs; GPT-5.4 frequently called the wrong functions, and after switching to Claude Opus the problem persisted but improved slightly.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/18/2026
First Seen
Valid until: 1/16/2027
Sources
Related Entities
Related Claims
UnverifiedBy removing half the tools and tightening the schema definitions, a developer noticeably improved the Agent tool-calling accuracy of GPT-5.4 and Claude Opus, while increasing prompt length did not improve the behavior.75% similarUnverifiedv3.0.70 fixes a 400 error triggered when generating commit messages and executing tasks in reasoning-off mode, affecting models including GPT-6 Astra, GPT-6.1 Sol, Claude Fable 5, and Claude Opus 5.5.73% similarUnverifiedStarting November 16, 2026, three models—Claude Opus 4.8, Claude Opus 5, and GPT-5.6 Terra—will be removed from GitHub Copilot's Chat, inline editing, ask and agent modes, and code completion.67% similar
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