DeepSeek V4
DeepSeek V4
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IDE coding agentOpenAI Chat CompletionsExperimentalSources checked 2026-09-26

Use DeepSeek V4.1 Flash with Cline

Connect Cline to DeepSeek V4.1 Flash with the DeepSeek-V4.io OpenAI-compatible endpoint, stable model ID, and a verified setup checklist.

Create API KeyRead API Docs

DeepSeek-V4.io is an independent API gateway, not the official DeepSeek website. A paid DeepSeek-V4.io key is required.

The public model ID remains deepseek-v4-flash. Text requests now route to DeepSeek V4.1 Flash; image input remains outside this gateway's verified support boundary.

How the integration works

Cline exposes Base URL, API Key, and Model ID fields through its OpenAI Compatible provider. Point those fields at DeepSeek-V4.io and keep the stable public model ID deepseek-v4-flash; the gateway currently maps that alias to DeepSeek V4.1 Flash upstream.

Use this gateway's stable model ID in Cline. DeepSeek's official API now uses deepseek-flash for V4.1 Flash. DeepSeek-V4.io intentionally keeps deepseek-v4-flash as its public alias and performs the upstream mapping server-side. Do not paste the official provider ID into this gateway configuration.
One site key

Create and manage it on /developer.

Compatible endpoint

The client talks to its native compatible endpoint.

Upstream hidden

Provider credentials and routing stay on the server.

Before you start

  • Cline installed in VS Code or a compatible editor
  • A paid DeepSeek-V4.io account with an API key from /developer
  • Access to the Cline API Provider settings

Safety before the first run

A coding agent operates with the workspace and execution permissions you grant it. Start with the smallest useful boundary.

  • Start in a disposable repository or worktree and ask Cline to perform a read-only task before enabling edits or commands.
  • Keep the DeepSeek-V4.io API key in Cline's provider settings. Never paste it into a prompt, source file, screenshot, or committed configuration.
  • Leave image support disabled for this route. The underlying V4.1 model is multimodal, but this gateway has only verified text requests.

Configure Cline

1.Enter these OpenAI Compatible settings
API Provider: OpenAI Compatible
Base URL: https://deepseek-v4.io/api/v1
API Key: your-deepseek-v4-io-key
Model ID: deepseek-v4-flash

Verify the setup

The page remains Experimental until these checks pass against the public DeepSeek-V4.io gateway.

  1. 1Start a new Cline task after saving the provider settings.
  2. 2Ask Cline to read one file without applying a change.
  3. 3Confirm streaming and a read-only tool call both complete.
Create and test an API key

Troubleshooting

Cline reports an invalid URL

Use the full base URL https://deepseek-v4.io/api/v1 without adding /chat/completions.

Authentication fails

Use the API key created on DeepSeek-V4.io. Keys from other providers are not accepted.

Cline reports model not found

Use deepseek-v4-flash with this gateway. The official DeepSeek model name deepseek-flash belongs to the official provider endpoint, not to DeepSeek-V4.io.

Existing task keeps the old model

Save the settings and create a new Cline task.

Frequently asked questions

Can Cline use DeepSeek V4.1 Flash?

Yes. Select Cline's OpenAI Compatible provider, use https://deepseek-v4.io/api/v1 as the Base URL, provide a paid DeepSeek-V4.io API key, and set the Model ID to deepseek-v4-flash. The gateway maps that stable alias to V4.1 Flash upstream.

Which model ID should I enter for DeepSeek V4.1 in Cline?

Use deepseek-v4-flash when the Base URL is DeepSeek-V4.io. DeepSeek's official API documents deepseek-flash, but model IDs are provider-specific and the two endpoints should not be mixed.

Does the Cline setup support images?

Not through this gateway today. Keep Cline's image-support setting disabled for this route even though the underlying DeepSeek V4.1 Flash release has native multimodal capability.

Is DeepSeek-V4.io the official DeepSeek API?

No. DeepSeek-V4.io is an independent gateway with separate accounts, API keys, balances, billing, and support.

Sources and support boundary

Configuration fields are checked against the tool publisher's documentation. DeepSeek-V4.io owns this gateway guide and support for its endpoint; it does not represent the tool publisher.

Ready to connect Cline?

Create a DeepSeek-V4.io API key, copy the configuration above, and verify one read-only tool call before using it on a real project.

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