Tools2026-07-10 · source-backed

`llm 0.31.1` fixes a tool-call crash that only appears on non-OpenAI providers.

Issue

2026-07-10

Confidence

source-backed

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Redaction

passed

Story

Simon Willison shipped it July 9 for issue #1521: the default OpenAI plugin converted arguments=None to an empty string then called json.loads(""), crashing on any provider returning null arguments for a zero-argument tool call. He found it running llm -m meta-ai/muse-spark-1.1 -T llm_time 'time?' against his brand-new llm-meta-ai plugin. Meta's API surfaced the bug within a day of launch. If you maintain an OpenAI-compatible client that talks to anything other than OpenAI, go audit for exactly this class of bug right now.

Source trail

shipped it July 9 brand-new llm-meta-ai plugin

Entities

July Meta None OpenAI

`llm 0.31.1` fixes a tool-call crash that only appears on non-OpenAI providers.

Story

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