Cline error
Cline: API Request Failed error: 400 Input tokens exceed the configured limit...
API Request Failed error: 400 Input tokens exceed the configured limit of 272000 tokens. Your messages resulted in 289650 tokens. Please reduce the length of the messages.Status: Fixed in releaseLast verified 1 documented fix4 sources
What it means
GPT-5's input limit is 272K tokens; Cline sent more than that.
Causes
- GPT-5's 400K context is split as 272K input plus 128K output; saoudrizwan explained that with a 128K max output the conversation can grow past the 272K input window, and the next request fails.
How to fix it
- Fix 1.
Update Cline: 3.24.0 "Set gpt5 max tokens to 8_192 to fix 'context window exceeded' error"; 3.26.2 "Fix GPT-5 context window configuration for OpenAI/OpenRouter/Cline providers to use correct 272K limit"; 3.26.6 makes GPT-5 respect the auto-compact setting.
More Cline errors
All 17 Cline errorsShell Integration Unavailable. Cline may have trouble viewing the command's output. Please update VSCode (CMD/CTRL + Shift + P → "Update") and make sure you're using a supported shell: zsh, bash, fish, or PowerShell (CMD/CTRL + Shift + P → "Terminal: Select Default Profile").Status: WorkaroundError executing command: The command ran successfully, but we couldn't capture its output. Please proceed accordingly.Status: Fixed in releaseCommand failed with exit code 1: powershell (Get-CimInstance -ClassName Win32_OperatingSystem).caption 'powershell' is not recognized as an internal or external command, operable program or batch file.Status: WorkaroundUnexpected API Response: The language model did not provide any assistant messages. This may indicate an issue with the API or the model's output.Status: WorkaroundInvalid API Response: The provider returned an empty or unparsable response. This is a provider-side issue where the model failed to generate valid output or returned tool calls that Cline cannot process. Retrying the request may help resolve this issue.Status: OpenModel returned empty responseStatus: OpenFunction call is missing a thought_signature in functionCall parts. This is required for tools to work correctly, and missing thought_signature may lead to degraded model performance.Status: Fixed in release429 {"type":"error","error":{"type":"rate_limit_error","message":"Number of request tokens has exceeded your per-minute rate limit (https://docs.anthropic.com/en/api/rate-limits); see the response headers for current usage. Please reduce the prompt length or the maximum tokens requested, or try again later. You may also contact sales at https://www.anthropic.com/contact-sales to discuss your options for a rate limit increase."}}Status: Workaround
Related reading
- What Is Cline? The Open-Source AI Coding Agent for VS CodeCline is a free, open-source VS Code extension for agentic AI coding. Bring your own model, a cloud API or a local one via Ollama, with no vendor lock-in.
- Every AI Coding Tool Compared: The 2026 MatrixEvery AI coding tool compared: 15 terminal, IDE, cloud and browser tools side by side on pricing, model surface, strengths, weaknesses and best use cases.
FAQ
What does "API Request Failed error: 400 Input tokens exceed the configured limit..." mean in Cline?
GPT-5's input limit is 272K tokens; Cline sent more than that.
How do I fix "API Request Failed error: 400 Input tokens exceed the configured limit..."?
Update Cline: 3.24.0 "Set gpt5 max tokens to 8_192 to fix 'context window exceeded' error"; 3.26.2 "Fix GPT-5 context window configuration for OpenAI/OpenRouter/Cline providers to use correct 272K limit"; 3.26.6 makes GPT-5 respect the auto-compact setting.
Is this Cline error fixed?
Status: Fixed in release. A release fixed this. The affected versions note says where the fix landed. Affected versions: Reported on 3.23.0; fixed by 3.26.2
Sources
Last verified against 4 sources: official docs, maintainer replies and release notes.
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