Cline + Kimi K3: every error we've hit, and the fix

Most Kimi K3 errors in Cline come from three places: the model's tool-call format on the first turn, the context-window fallback that third-party endpoints inherit, and provider configuration that went stale between Cline versions. This page collects every error we've hit running kimi-k3 in Cline, through our own endpoint and through Cline's built-in Wallaby provider in v4.1.19 and later. Each entry is marked as reproduced by us, an open issue on the Cline tracker, or fixed in a specific version, with the fix for each. Disclosure: Wallaby Token sells API access to kimi-k3.

The quick-reference table below maps symptom to cause to fix; each section then gives the error verbatim, because the exact string is what you pasted into Google. Issue states are as of October 7, 2026.

Quick reference

"Invalid API Response" after the first message — why?

Status: open issue, cline/cline#12385, reported July 18, 2026 and still open.

The first message goes through and the model starts answering, then the turn dies with the full string: Invalid 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. (That wording is Cline's stock error text.) After retries, Cline closes the run with Cline hit repeated tool call failures. Try guiding it with a new prompt. The reporter's own read: the model emitted plain text where Cline expected a tool call, or malformed XML the parser could not recover from.

Two escapes surface in the issue thread, both user-reported rather than confirmed fixes. Several people hit this only in the VS Code extension while the Cline CLI worked fine on the same model — and a Cline team member suggested exactly that test, since the CLI runs a newer tool-call harness. One user reports it cleared after updating VS Code. Retries also get through occasionally, which matches the error text's own advice. We have not reproduced this one on our own endpoint, so we pass along the thread's findings rather than a fix we cannot vouch for. If it is your blocker, add your version numbers to that issue; the tracker is where the fix will land.

"Upstream stream ended before terminal chunk" — why?

Status: open issue, cline/cline#12850, reported August 2, 2026 and still open.

This one is specific to the Cline CLI: mid-conversation, the stream stops and the CLI exits with * Error: Upstream stream ended before terminal chunk. In ~/.cline/data/logs/cline.log the same failure shows up as Interactive turn failed with that message attached. The report, filed against CLI 3.0.48 with cline-pass and kimi-k3, sits open with no confirmed root cause posted yet, so the honest answer is the symptom plus the link. It is a CLI-side report. We have not seen the VS Code extension fail with this exact string in our own runs.

Model names garbled ("Kimi5K3-Flash") when switching — why?

Status: open issue, cline/cline#13901, reported September 5, 2026 and still open.

In the Cline CLI, version 3.0.61 in the report, switching models with /model can render two names overlapped: the reporter saw "GLM 5.3 Flash" and "Kimi K3" printed on top of each other as "Kimi5K3-Flash", with a screenshot attached. It is a cosmetic display bug, and the underlying model selection still works. Nothing to fix on your side; track the issue for the UI patch.

Cline shows a 128K context (or compacts silently) — why?

Status: reproduced by us, plus two open issues, #10637 from May 11, 2026 and #12520 from July 24, 2026.

Kimi K3 supports a 1M-token context, but Cline only knows what the provider metadata tells it. On a third-party OpenAI-compatible endpoint, that metadata is often absent, and Cline falls back to displaying a 128K context window. We hit this in our own September 12 test run, and the built-in Wallaby provider in v4.1.19 and later does not prefill the context field either, as of v4.1.22. The fix is manual: open Settings, then API Configuration, then MODEL CONFIGURATION, and set the context window yourself. 262144 is a sensible daily value; 1048576 is the full window.

Two related tracker items are still open. The CLI's openai-compatible provider ignores contextWindow in models.json, per #12520. And auto-compaction has been reported to trigger silently even with the setting disabled, per #10637. If your context seems to shrink mid-task with no warning, the second one is your issue to watch.

Every task shows $0.00 — why?

Status: reproduced by us in our September 12 and October 7 test runs; the built-in provider half is open issue #14902, filed by us.

Cline computes task cost from the per-million-token prices in the model configuration. On a custom endpoint those Input/Output Price fields default to 0, shown as "Free", so every task happily reports $0.00. Fill in the real prices and the display starts tracking reality. For kimi-k3 through our endpoint that is input $2.70 and output $13.50 per 1M tokens, 10% off the official list.

We had hoped the built-in Wallaby provider would fix this by carrying the defaults with it. It does not, as of v4.1.22: selecting Wallaby in the provider dropdown leaves the base URL, model ID, context window, and both price fields blank. We filed that as #14902. Until it lands, filling the fields by hand is a required step, not an optional one.

The cost Cline shows is lower than what I was charged — why?

Status: open issue, cline/cline#13944, reported September 8, 2026 and already on the team's Linear board; reproduced and quantified by us.

If you searched "cline cost wrong" or "cline cost lower than bill" and landed here: your bill is right, and Cline's display is missing a component. The cost module supports a cacheReadsPrice and reads cached_tokens from the usage data, but the settings UI has no input field for that price, so cached-read tokens are priced at $0 in the display even when your provider charges for them.

We measured the gap across four full agent runs on kimi-k3 on October 7: Cline's displayed cost came in 21–37% below the actual metered charge on our gateway, every round. In the cleanest round, the display showed $0.4683, which matches fresh input of 88.0K tokens at $2.70/M plus output of 17.1K at $13.50/M to the digit; the missing $0.256 was exactly the cached-read charge for 947K tokens at $0.27/M. We posted the full numbers as a comment on the issue. Until a cacheReadsPrice input ships, treat Cline's cost display as a lower bound; the number that counts is the one in your provider's console.

429s and quota errors: BYOK vs ClinePass

Two different things share the 429 label, and the fix depends on which side you are on.

On the bring-your-own-key side, with your own provider key, ours included: rate-limit responses are retried automatically by Cline, and transient 429s clear within seconds. In our own production runs, the brief 429 bursts we have logged cleared on retry without any config change. If one sticks, check your key's remaining quota and per-key caps in your provider's console before assuming the client is broken.

On the ClinePass side: fresh accounts have reported the weekly usage window jumping to 100% within minutes of first paid usage, with the window code drifting while metering continues. That is tracked in open issue #13707, reported August 31, 2026. That one is on Cline's metering, not your configuration; add your timestamps to the issue if it hits you.

What we run

We run kimi-k3 in Cline daily, on our own endpoint, through both paths covered above: the built-in Wallaby provider and the manual OpenAI-compatible route. This page doubles as our own internal checklist. The full setup walkthrough, with screenshots of both paths, is in our Cline setup guide. If you want the same endpoint in VS Code without Cline, the BYOK guide covers it; for how the pricing compares across providers, see the price comparison. Live availability is on our status page. And one clarification, since the name trips people up: the "token" in Wallaby Token is the LLM metering unit, nothing crypto.