# `LangChain.Chains.LLMChain.Modes.UntilSuccess`
[🔗](https://github.com/brainlid/langchain/blob/v0.8.0/lib/chains/llm_chain/modes/until_success.ex#L1)

Execution mode that loops until a successful result.

Calls the LLM, executes tool calls, and repeats until:
- The last message is an assistant response (success)
- The last message is a tool result with no errors (success)
- Max retry count is exceeded (error)

## Options

- `:force_recurse` — When `true`, forces recursion even after a successful
  result. Used internally by `UntilToolUsed` mode. Default: `false`.

## Usage

    LLMChain.run(chain, mode: :until_success)

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*Consult [api-reference.md](api-reference.md) for complete listing*