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Missleading documentation or incorrect behaviour about small_model #6055

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opened 2026-02-16 17:59:57 -05:00 by yindo · 0 comments
yindo commented 2026-02-16 17:59:57 -05:00
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Originally created by @podliy16 on GitHub (Jan 15, 2026).

Originally assigned to: @thdxr on GitHub.

Description

Looking at the documentation for OpenCode at https://opencode.ai/docs/config/:

The small_model option configures a separate model for lightweight tasks like title generation. By default, OpenCode tries to use a cheaper model if one is available from your provider, otherwise it falls back to your main model.

However
https://github.com/anomalyco/opencode/blob/253b7ea78403585db916dc2746d07f622015c597/packages/opencode/src/provider/provider.ts#L1109

The code shows that OpenCode first attempts to use its own opencode provider for the small model. Only if the opencode provider is unavailable does it fall back to the user's main configured model.

This discrepancy can lead to unexpected behavior. For example, when using deepseek-reasoner via the DeepSeek provider as a main model, OpenCode silently used opencode nano-5-gpt as the small model. This means session data was sent to OpenCode's servers without explicit notice, raising potential privacy concerns.

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Originally created by @podliy16 on GitHub (Jan 15, 2026). Originally assigned to: @thdxr on GitHub. ### Description Looking at the documentation for OpenCode at https://opencode.ai/docs/config/: > The small_model option configures a separate model for lightweight tasks like title generation. By default, OpenCode tries to use a cheaper model if one is available from your provider, otherwise it falls back to your main model. However https://github.com/anomalyco/opencode/blob/253b7ea78403585db916dc2746d07f622015c597/packages/opencode/src/provider/provider.ts#L1109 The code shows that OpenCode first attempts to use its own opencode provider for the small model. Only if the opencode provider is unavailable does it fall back to the user's main configured model. This discrepancy can lead to unexpected behavior. For example, when using deepseek-reasoner via the DeepSeek provider as a main model, OpenCode silently used `opencode nano-5-gpt` as the small model. This means session data was sent to OpenCode's servers without explicit notice, raising potential privacy concerns. ### Plugins _No response_ ### OpenCode version _No response_ ### Steps to reproduce _No response_ ### Screenshot and/or share link _No response_ ### Operating System _No response_ ### Terminal _No response_
yindo added the bugdocs labels 2026-02-16 17:59:57 -05:00
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Reference: anomalyco/opencode#6055
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