Integration guide · 2026-09-30

LLM API timeouts: reconcile usage before retrying

An AI assistant drafted these guides and checked them against public documentation. They were not generated through a recorded Rynler inference run and contain no performance or cost measurements.

A timeout tells you that the client did not obtain the response it expected within its waiting window. It does not, by itself, establish that no model work happened or that nothing was charged.

That distinction matters when an application responds to every failure by sending the same task again. The new request can create new work while the original outcome remains unresolved. A progress message can also mislead the user if it describes a timeout as a completed failure before the service's records establish what happened.

This guide explains a reconciliation workflow for LLM API integrations. It is written by Rynler and describes a method, not a new incident report or a guarantee about refunds, settlement time or automatic recovery. No inference calls or billing measurements were performed to produce it.

Track delivery, useful output and cost separately

An inference task has several observable states. Your application needs to distinguish them even if its interface eventually shows a simple success or failure message.

Delivery concerns the request and response your client observed. Acceptance concerns whether the returned answer met the task's requirements. Usage concerns the work recorded for that request. Accounting concerns any amount held, charged or released.

These states can differ. An answer can arrive but fail the acceptance rule. Usage can be recorded while the application's parser rejects the response. A connection can close before the application knows whether the service completed the task. Preserve each observation instead of collapsing all of them into one error flag.

These are reconciliation categories, not promises that every service exposes the same fields or lifecycle. Map them to the records your service actually provides.

Preserve the request identity before handling failure

Associate the application task with the exact attempt it submitted. Retain the operation's identifier, selected model, endpoint, request settings and submission time. Add the service's request identifier when one is returned.

An idempotency key belongs in this record when the service documents it. It helps identify the operation you intended, but a header name is not a universal retry contract. Check the service's behavior before relying on replay, retention or duplicate-request handling.

Keep the operation identity distinct from the task's description. Two submissions asking for the same summary can still be separate billable operations. Conversely, an accounting update for the original attempt should remain associated with that attempt rather than being attached to the most recent retry.

Rynler documents idempotency headers and guidance for inspecting uncertain requests in its authentication and integration guidance. Use that documented behavior for the Rynler integration rather than importing replay assumptions from another provider.

Classify what you know before deciding to retry

The first recovery step is to update the original operation's state using evidence you already have. Preserve the client event and any service result. Avoid deciding that an error is free, settled or safely replayable merely from its status text.

A documented rejection needs a correction

If the service returned a documented validation or eligibility rejection, fix the relevant request or account condition before proposing new work. A correction to an unsupported field is different from retrying an unchanged request.

Retain the rejection record and examine any associated accounting information. This category describes what the application should investigate; it does not establish a universal billing policy for rejected requests.

An uncertain attempt needs reconciliation

If the client timed out, lost the connection or cannot establish a definitive outcome, mark the attempt unresolved. Pause automated replacement work for that operation while inspecting the available records.

This is consistent with HTTP's treatment of retries: a client should not automatically repeat a non-idempotent request unless it can establish that the operation is idempotent or that the original request was not applied. That principle is described in RFC 9110, section 9.2.2. The protocol principle does not supply an inference provider's replay contract.

A completed attempt still needs an acceptance decision

When an answer exists, apply the product's acceptance rule. If the result is unusable, record both the completed operation and the rejection of its output. A regeneration decision can then account for the first operation's cost rather than concealing it inside a “retry” statistic.

Reconcile the original operation before adding new work

Use the records available for the original attempt. Match the request identity, model and timing before comparing usage or amounts. A nearby wallet change is not enough evidence that a specific request has settled.

Look for the operation's completion state, recorded usage and corresponding accounting entries. If an amount remains held, keep it separate from any final debit. If the record does not explain the outcome, retain the uncertainty and use the service's supported review process.

Rynler's request-limits and retries guide directs integrations to inspect an uncertain request before creating new work. Its documented SSE path buffers output until completion, so the arrival or absence of incremental content should not be treated as proof of billing settlement.

Do not manufacture a result by adjusting the local estimate. An estimate and a recorded charge describe different things. If they differ, examine the usage category, settings, applicable rate and operation identity. If the evidence is incomplete, label the difference unresolved.

Separate credit reservation from final expense

For an integration that exposes held credit, a reservation represents an amount set aside while an operation is being handled or reviewed. A final debit represents a recorded charge. Treating them as the same quantity can distort both the displayed balance and the reported cost.

Build your local accounting view around the distinctions the service actually exposes. Keep confirmed expense, outstanding held amounts and any unresolved observations separately visible. Do not promise when a hold will be released unless the applicable policy establishes that timeline.

For a cost report, an unresolved attempt should remain in the report's scope. Excluding it understates what is known about the workflow. Counting a held amount as a final charge overstates what is known about settlement. Present the uncertainty as its own state.

Make recovery a deliberate application decision

After reconciliation, decide what the user actually needs next. An acceptable answer can complete the task. A completed but unsuitable answer can justify separately approved new work. A definitive rejection can justify a corrected submission. An unresolved attempt remains unresolved until the relevant evidence changes.

Design recovery so that this decision is explicit. The application should not quietly create a fresh request identity merely to escape the original attempt's uncertainty. If a new operation is authorized, preserve its relationship to the prior task while keeping its own identity and cost record.

The same principle applies to provider fallback. Switching providers can create another operation; it does not settle the first. Keep the original attempt under review and include both operations in the task's eventual cost report when their outcomes are known.

Explain uncertainty clearly to the user

A useful status message states what the application observed and what it is doing next. For example: “The request outcome is still being checked. We have paused automatic resubmission.” That message describes a workflow decision without promising a refund or claiming the model never ran.

When a result has been confirmed, update the interface with that evidence. Keep task success distinct from cost settlement where they are still at different stages. An application can deliver an answer and continue accounting review, provided the interface accurately describes the remaining work.

Avoid exposing internal account records or raw request content in a public status message. The user needs the outcome and next step; the investigation record can preserve the operational details needed to resolve it.

FAQ

Does a timeout mean the request was free?

No. A timeout alone does not establish a billing outcome. Check the original operation's usage and accounting records before reporting its final cost.

Can I retry safely because I used an idempotency key?

Use the service's documented semantics. The key helps identify an operation, but it does not establish a universal replay guarantee, retention period or replacement-request policy.

Is a held amount the same as a settled charge?

Keep them separate wherever the service exposes that distinction. Report the final debit as confirmed expense and retain unresolved holds as unresolved accounting state.

Can I move the task to another provider immediately?

That can create new work and a new cost while the first attempt remains unresolved. Make the recovery decision explicit, respect the authorized budget and retain both operation records.

Verify the recovery contract before integrating

Read Rynler's API documentation for the operation you plan to send, and review pricing and credit terms before authorizing new inference work. Build the application around request identity, useful output and recorded accounting evidence. A timeout is a reason to inspect the operation, not a complete answer about its cost.