Ollama 0.33.3 gives two answers for gemma3: /api/tags lists it as
['completion'], while /api/show for the same model reports
['completion', 'vision']. getModelCapabilities trusted the list outright
and cached it for the life of the process, so image upload stayed disabled
for gemma3, one of the most common small vision models, even though the
model downloader correctly shows it as text + image. Re-pulling does not
help: the local digest matches the registry.
A list that reports vision is still trusted without probing. A list that
omits it is no longer conclusive: the model is probed through /api/show
(then llama.cpp /props), and the list's answer stands only when the probes
have nothing better, which keeps hybrid routers without /api/show working.
The service's own copy of the short-circuit is removed so the rule lives in
the one tested function.
Verified on NOMAD3 (v1.35.0 + this patch): installed-models moves gemma3:4b
from unsupported to supported, every other model unchanged, and a chat with
an attached image is answered correctly.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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