OpenCode

OpenCode
DeveloperAnomaly Innovations
Stable release
2.0.29 Edit this on Wikidata / 13 October 2026; 17 days ago (13 October 2026)
Written inTypeScript
Operating systemLinux, macOS, Windows
TypeAI-assisted software development
LicenseMIT License
Websiteopencode.ai Edit this on Wikidata
Repository

OpenCode is a free and open-source artificial intelligence coding agent developed by Anomaly Innovations. It uses a large language model to interpret natural-language instructions, run commands and make changes across a project's source code. OpenCode can be used through a terminal, desktop application, or integrated development environment (IDE), and supports models from more than 75 providers, including Anthropic, Google, and OpenAI, as well as locally hosted models.

History

OpenCode is developed by Anomaly Innovations, the team behind the serverless development framework SST. The active version of OpenCode is primarily written in TypeScript, uses Bun, and is released under the MIT License. It is distinct from an earlier Go-based project of the same name that was archived in September 2025. In February 2026, Anthropic revised its terms to make clear that consumer Claude subscriptions could not be used through unauthorized third-party harnesses. The same week, OpenCode removed support for Claude Pro and Max account keys, citing legal requests from Anthropic.

In October 2026, Anomaly released OpenCode 2.0, which moved the terminal, desktop and web clients onto one shared background service.

Features

OpenCode is not tied to one model provider: users connect their own providers and API keys, and it can also use locally hosted language models through llama.cpp, LM Studio, and Ollama. The agent can edit files and run shell commands, and it integrates with Language Server Protocol servers so that the model receives their feedback about the codebase. It also supports the Model Context Protocol for connecting external tools and services. OpenCode includes separate planning and building modes, with the planning mode restricting file modifications by default. In addition to its command-line interface, it has a desktop application and an extension for VS Code and forks such as Cursor, VSCodium, and Windsurf. OpenCode can connect to model aggregation services such as OpenRouter, allowing users to access models from multiple artificial intelligence providers through a single API.

Use

In February 2026, Cloudflare released Vinext, an experimental reimplementation of most of the Next.js application programming interface on Vite. Cloudflare engineering director Steve Faulkner said he had spent a couple of hours with Anthropic's Claude in OpenCode defining the architecture, then had the model implement the API piece by piece, using the existing Next.js test suite to find problems.

See also

References

  1. ↑ "Release 2.0.29". 13 October 2026. Retrieved 15 October 2026.
  2. 1 2 Sawers, Paul (March 7, 2026). "Open-source coding agents like OpenCode, Cline, and Aider are solving a huge headache for developers". The New Stack. Retrieved October 29, 2026.
  3. 1 2 "Providers". OpenCode. Anomaly. Retrieved August 16, 2026.
  4. 1 2 3 4 De Simone, Sergio (February 5, 2026). "OpenCode: an Open-source AI Coding Agent Competing with Claude Code and Copilot". InfoQ. Retrieved August 15, 2026.
  5. ↑ "About". SST. Anomaly Innovations. Retrieved August 16, 2026.
  6. 1 2 Sawers, Paul (October 12, 2026). ""A major overhaul": OpenCode 2.0 puts its terminal, desktop, and web apps on one shared service". The New Stack. Retrieved October 29, 2026.
  7. ↑ "anomalyco/opencode". GitHub. Retrieved October 29, 2026.
  8. ↑ "package.json". GitHub. anomalyco/opencode. Retrieved October 29, 2026.
  9. ↑ "opencode-ai/opencode". GitHub. Retrieved August 16, 2026.
  10. ↑ Claburn, Thomas (February 20, 2026). "Anthropic: No, absolutely not, you may not use third-party harnesses with Claude subs". The Register. Retrieved August 15, 2026.
  11. 1 2 "Agents". OpenCode. Anomaly. Retrieved October 29, 2026.
  12. ↑ "IDE". OpenCode. Anomaly. Retrieved August 16, 2026.
  13. ↑ "OpenCode Integration". OpenRouter. Retrieved August 16, 2026.
  14. ↑ Anderson, Tim (February 25, 2026). "Cloudflare experiment ports most of Next.js API 'in one week' with AI". The Register. Retrieved August 16, 2026.