LiteLLM responses() Timeout Parameter Silently Dropped on Completion Path

What this error means

Timeout parameter silently dropped on completion transformation path (affects Anthropic, Bedrock, Vertex) causing unexpected request hangs is a LiteLLM failure pattern reported for developers trying to debug why explicit timeout setting disappears when passing requests through litellm’s responses() wrapper, leading to indefinite hangs on slow providers. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Open GitHub issue #28132 on BerriAI/litellm (opened May 17, 2026 by cwang-otto). Clients set explicit timeouts but LiteLLM drops them during internal transformation, causing requests to hang indefinitely. High commercial impact: timeout misconfiguration costs real money in pay-per-use LLM APIs.

Common causes

• Open GitHub issue #28132 on BerriAI/litellm (opened May 17, 2026 by cwang-otto). Clients set explicit timeouts but LiteLLM drops them during internal transformation, causing requests to hang indefinitely. High commercial impact: timeout misconfiguration costs real money in pay-per-use LLM APIs.

Quick fixes

1. Confirm the exact error signature matches Timeout parameter silently dropped on completion transformation path (affects Anthropic, Bedrock, Vertex) causing unexpected request hangs.
2. Check the LiteLLM account, local tool state, and provider configuration involved in the failing workflow.
3. Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://github.com/BerriAI/litellm/issues/28132

Evidence note: Open GitHub issue #28132 on BerriAI/litellm (opened May 17, 2026 by cwang-otto). Clients set explicit timeouts but LiteLLM drops them during internal transformation, causing requests to hang indefinitely. High commercial impact: timeout misconfiguration costs real money in pay-per-use LLM APIs.

Related errors

• LiteLLM

FAQ

What should I check first?

Start with the exact Timeout parameter silently dropped on completion transformation path (affects Anthropic, Bedrock, Vertex) causing unexpected request hangs text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed LiteLLM workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without Timeout parameter silently dropped on completion transformation path (affects Anthropic, Bedrock, Vertex) causing unexpected request hangs.