VSCode + Continue + DeepSeek: AI Coding Without the GPT-4o Price Tag

#vscode #ai #programming #tutorial

Continue is the most popular open-source AI coding extension for VSCode. It supports tab autocomplete and a chat sidebar, working with any OpenAI-compatible API.

Pairing Continue with DeepSeek V4 through AIWave gives you the same coding assistant experience as using GPT-4o — but at a fraction of the cost.

Why Continue + DeepSeek?

Continue has two main features:

Tab autocomplete: Suggests completions as you type (like Copilot)
Chat sidebar: Ask questions about your codebase, generate code, explain errors

DeepSeek V4 Flash is fast enough for real-time autocomplete (sub-second latency from most regions to AIWave's Singapore servers) and strong enough for complex coding questions.

Installation

Install Continue from the VSCode Marketplace
Get an API key from AIWave (free $1 credit on signup)
Configure (see below)

Configuration

Open Continue's config file (~/.continue/config.yaml or via Ctrl+Shift+P > "Continue: Open Config"):

models:
  - name: DeepSeek V4 Flash
    provider: openai
    model: deepseek-chat
    apiBase: https://aiwave.live/v1
    apiKey: YOUR_API_KEY
    roles:
      - autocomplete
      - chat

  - name: DeepSeek V4 Pro
    provider: openai
    model: deepseek-reasoner
    apiBase: https://aiwave.live/v1
    apiKey: YOUR_API_KEY
    roles:
      - chat

This uses V4 Flash for autocomplete (speed-critical) and V4 Pro for chat (quality-critical). Both use the same API key.

Autocomplete vs Chat: Different Needs

	Autocomplete	Chat
Latency needed	< 500ms	1-5s acceptable
Typical input	500-2K tokens	2K-20K tokens
Typical output	50-200 tokens	500-4K tokens
Best DeepSeek model	V4 Flash	V4 Pro

Autocomplete fires on every keystroke pause — high volume, tiny per-request cost. Chat fires on explicit action with longer contexts.

Cost Estimate

Assumptions: 300 autocomplete calls/day (500 in + 100 out) + 20 chat messages/day (4K in + 2K out), 22 work days/month.

Component	Daily	Monthly (22 days)
Autocomplete (V4 Flash)	$0.0028	$0.06
Chat (V4 Pro)	$0.0432	$0.95
Total	$0.046	$1.01

Same workload with GPT-4o: ~$15/month.

Tips

Use @ mentions: Type @ followed by a filename to include it in chat context. @folder/ includes entire directories.
Reduce autocomplete latency: If autocomplete feels slow, use V4 Flash exclusively.
Context management: DeepSeek V4 supports 1M tokens. Continue auto-manages context, but use /clear to reset if responses degrade.

Troubleshooting

Autocomplete not triggering: Verify the model has the autocomplete role. Check VSCode: Editor: Accept Suggestion On should be enabled.
API errors: Confirm apiBase ends with /v1. Test with curl to AIWave's endpoint.
Model name mismatch: Use deepseek-chat for V4 Flash and deepseek-reasoner for V4 Pro. See models page.

Continue gives you a Copilot-like experience in VSCode. DeepSeek through AIWave makes it affordable — about $1/month for heavy daily use. The $1 free credit covers your first month while you evaluate.