Gemini Code Assist vs OpenCode: Side-by-Side Comparison 2026

Gemini Code Assist vs OpenCode comparison 2026. Side-by-side features, pricing & capabilities.

Gemini Code Assist is an editor extension from Google — google's ai coding assistant. OpenCode is a CLI-based coding agent from SST — open-source terminal ai coding agent.

Gemini Code Assist

Google's AI-powered coding assistant built on Gemini. Provides code completions, chat, code transformations, and full codebase awareness in VS Code and JetBrains IDEs.

  • ✓ Code completions
  • ✓ AI chat
  • ✓ Code transformations
  • ✓ Codebase awareness
  • ✓ Pull request summaries

Free / $19/mo · 6 plans

OpenCode

Open-source terminal AI coding agent from SST. Free with BYOK, or use OpenCode Zen (pay-per-token) and Black (flat-rate subscription at $20/$100/$200/mo) for managed model access.

  • ✓ AI chat
  • ✓ Agentic mode
  • ✓ Multi-file editing
  • ✓ Terminal commands
  • ✓ Test generation

Free · 2 plans

Feature Gemini Code Assist OpenCode
Category ExtensionCLI
Starting Price Free Free
Model Family GeminiMulti-model (any)
Agentic Mode — ✓
Multi-File Editing — ✓
Terminal Commands — ✓
Documentation ✓ —
Git Integration ✓ —
Open Source NoYes (MIT)

Pricing verified Feb 25, 2026. Gemini Code Assist pricing | OpenCode pricing

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Key Differences

  • Category: Gemini Code Assist is an editor extension; OpenCode is a CLI-based coding agent.
  • Starting price: Gemini Code Assist starts at $19/mo; OpenCode starts at free / BYOK.
  • Model family: Gemini Code Assist uses Gemini; OpenCode uses Multi-model (any).
  • Agentic mode: OpenCode supports agentic mode; Gemini Code Assist does not.
  • Open source: Gemini Code Assist: No. OpenCode: Yes (MIT).
  • Bring your own key: OpenCode supports BYOK; Gemini Code Assist does not.
  • Platforms: Gemini Code Assist runs on Desktop, Web; OpenCode runs on Linux, Windows, macOS.
  • Provider: Gemini Code Assist is built by Google; OpenCode is built by SST.
  • Capabilities: OpenCode has multi-file editing; OpenCode has terminal commands.

Which Should You Choose?

Choose Gemini Code Assist if you want deep integration with Google Cloud services and infrastructure. Choose OpenCode if you want open-source terminal-based coding with model flexibility. Read our full reviews to see which fits your workflow.

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