Whether a provider works in the web build depends on CORS headers being set
on the response (not just the preflight), and whether a model is usable in
the AI chat panel depends on its streaming tool calls being well-formed.
Neither is documented by providers, so record what has been measured.
Covers 11 providers and 5 models, each row dated. Documents two recurring
failure modes: vLLM misrouting the final tool-call argument chunk to
index + 1 without an id, and reasoning models returning null content under
the connection test's maxOutputTokens: 1.
Includes copy-paste curl recipes so others can add rows.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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