Opencode (SST)
SST team's open-source terminal coding agent — TypeScript, multi-model, MCP-native. Released 2025; explicitly positioned as a permissively-licensed Claude Code alternative. Memory via AGENTS.md (the emerging cross-harness convention).
Active · Verified 2026-10-26 · fresh as of 2026-10-26 · 50 cited facts, 2 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Type
- OSS terminal coding agent (SST) vendor fix
- Tier
- T2
- Section
- Agent IDEs & coding harnesses
- Latest release
- v1.19.4 (2026-10-22) repo fix
- Pricing
- Free (OSS) vendor fix
- Funding
- SST (Anomaly Innovations — OSS company) vendor fix
- Freshness
- 2026-10-26 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source vendor fix
- Developer activity
- OpenRank 380.69 (12-mo avg 234.8) — 2025-12 third-party fix
When to use
Optimised for: permissively-licensed terminal coding agent + MCP
Anti-fit: younger ecosystem than Aider/Claude Code
Pros & cons
Pros
Fully MIT — no per-token surcharge or vendor lock; respects AGENTS.md as the emerging cross-harness convention.
Cons
Younger than Aider/Claude Code; smaller ecosystem and fewer pre-built rules.
Claims & capabilities
Built by SST (serverless-stack); multi-model; MCP-native.
Technical surface
- API surface
- CLI (Node.js); MCP
- Backend storage
- local AGENTS.md + config
- Deployment
- Self-hosted only — local TUI/CLI (npm, Homebrew) and desktop app; BYO model provider
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- single-user
- MCP
- native — Opencode is an MCP client
- A2A
- searched not found
- OpenTelemetry
- searched not found
Alternatives to Opencode (SST) → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other agent ides & coding harnesses in the catalog, ranked by inbound references.
- Claude Code (Anthropic) T1
Anthropic's agentic coding tool: Claude as a coding agent in the terminal, IDEs (VS Code, JetBrains), desktop app, web/mobile, GitHub and Slack. Context via CLAUDE.md, skills, hooks, subagents and MCP servers.
- Cursor (IDE) T1
AI-first IDE that forked VS Code; Composer (multi-file edit) and Agent Mode (long-running coding agent) are its flagship surfaces. Memory layer = .cursorrules / Rules; recall via repo-aware Context Engine. Anysphere (parent) raised $900M Series C at $9.9B in May 2025; acquired by SpaceX (announced 2026-08-14, terms undisclosed), product continues under the Cursor brand.
- OpenAI Codex CLI T1
OpenAI's actively developed OSS terminal coding agent (Apr 2025), now written in Rust (codex-rs replaced the original TS CLI); also IDE extension + desktop app. Separate from the Codex Web cloud agent and the retired 2021 Codex model API. The codex mcp-server command (Codex as an MCP server) was deprecated on 2026-08-24 and removed in CLI 0.154.0 (2026-09-09); OpenAI points integrations to the experimental Codex app server, and codex mcp still connects Codex to external MCP servers.
- Bedrock AgentCore (AWS) T2
AWS Bedrock AgentCore — managed runtime to deploy + scale + observe agents. Multi-component: Runtime, Identity, Memory, Gateway, Browser, Code Interpreter, Observability. Distinct from Bedrock Agents (older fixed-config product); AgentCore is the 2025 framework-agnostic runtime for any agent (LangGraph, CrewAI, Strands, OpenAI Agents SDK).
- GitHub Copilot (Agent Mode) T1
The original AI coding assistant (Copilot in editor; 2021). 2025 evolved into a full agentic surface: chat, completions, Agent Mode (multi-step), and Copilot Workspace. Backed by Microsoft. Distinct row from Workspace — this row covers the everyday in-editor + agent mode product, Workspace covers the hosted spec-driven workflow.
- Goose (Block) T2
Block (Square)'s open-source on-machine agent — terminal + desktop GUI. Modular: extensions for shell, computer-control, MCP servers; multi-model via LiteLLM. Released 2024; positioned as a general-purpose local agent, not coding-only. Goose Recipes provide reusable agent workflows.
Sources (49 cited facts, 2 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is OSS terminal coding agent (SST) vendor
- What it does & what's distinct SST team's open-source terminal coding agent — TypeScript, multi-model, MCP-native. Rele… vendor
- Claims / benefits Built by SST (serverless-stack); multi-model; MCP-native. vendor
- Modalities text vendor
- Created 2025-06 vendor
- Latest release v1.19.4 (2026-10-22) repo
- License MIT vendor
- GitHub anomalyco/opencode (formerly sst/opencode) — ~222k stars, last commit 2026-10 repo
- Mindshare Front-page HN launch; covered by The New Stack vendor
- Funding SST (Anomaly Innovations — OSS company) vendor
- Customers / scale OSS community vendor
- Pricing Free (OSS) vendor
- Compliance OSS — no formal compliance vendor
- Data handling Local CLI; LLM calls go through user's chosen provider vendor
- Deployment Self-hosted only — local TUI/CLI (npm, Homebrew) and desktop app; BYO model provider repo
- HQ US (SST team distributed) vendor
- Founders / pedigree Jay V (SST creator), Dax Raad vendor
- Memory volume / scale no scale claim vendor
- Code/weights release Open-source — github.com/sst/opencode vendor
- API surface CLI (Node.js); MCP vendor
- Backend storage local AGENTS.md + config vendor
- Multi-tenancy single-user vendor
- Encryption TLS for LLM APIs vendor
- Versioning AGENTS.md in git vendor
- Schema evolution free-form / no schema vendor
- Namespace primitives per-project vendor
- Contradiction handling human-arbitrate vendor
- MCP support native — Opencode is an MCP client vendor
- Import / export AGENTS.md is markdown vendor
- Validated verticals coding agents — broad horizontal vendor
- Time to running <5min (`npm i -g opencode-ai`) vendor
- Anti-fit younger ecosystem than Aider/Claude Code vendor
- Optimised for permissively-licensed terminal coding agent + MCP vendor
- Adjacent infrastructure any OpenAI-compatible API; MCP vendor
- Pros Fully MIT — no per-token surcharge or vendor lock; respects AGENTS.md as the emerging cr… vendor
- Cons Younger than Aider/Claude Code; smaller ecosystem and fewer pre-built rules. vendor
- Project & sources opencode.ai; github.com/sst/opencode vendor
- download-trajectory [{"ym":"2023-05","monthly":0,"cum":0},{"ym":"2023-06","monthly":0,"cum":0},{"ym":"2023-0… registry
- cost-input-usd-per-mtok 0 vendor
- cost-output-usd-per-mtok 0 vendor
- cost-tier free vendor
- cost-pricing-model free-tier vendor
- cost-last-verified 2026-06-29 vendor
- adoption-accelerator yc-w21 third-party
- architecture-deployment-locus local vendor
- licensing-bucket open-source vendor
- positioning-platform-vs-product product vendor
- taxonomy-three-layer-rollup agent-infra repo
- developer-activity-opendigger {"activity":1266.69,"as_of":"2025-12","openrank_12mo":234.8,"openrank_current":380.69,"p… third-party
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
Related systems
References (2)
- Model Context Protocol (MCP spec) depends on at runtime — SST team's open-source terminal coding agent — TypeScript, multi-model, MCP-native.
- OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) depends on at runtime — adjacent-infrastructure cell: any OpenAI-compatible API; MCP
Referenced by (20)
- agentgateway integrates with — agentgateway integrations docs have a OpenCode client page. (verified 2026-10-29)
- Arize Phoenix integrates with — Arize Phoenix docs have a Opencode (SST) integration page. (verified 2026-10-29)
- Bifrost (Maxim AI) integrates with — Bifrost docs have a CLI-agent integration page for OpenCode. (verified 2026-10-29)
- Braintrust integrates with — Braintrust docs have a Opencode (SST) integration page. (verified 2026-10-29)
- Cloudflare AI Gateway integrates with — Cloudflare AI Gateway integrations docs have a OpenCode page. (verified 2026-10-29)
- Cloudflare MCP server portals integrates with — Cloudflare MCP server portals docs: the portal page gives per-client connection instructions for OpenCode. (verified 2026-10-29)
- Daytona integrates with — Daytona docs have a guide for running Opencode (SST) with Daytona sandboxes. (verified 2026-10-29)
- Docker MCP Catalog, Toolkit & Gateway integrates with — Docker MCP Toolkit get-started page has connect-client instructions for OpenCode. (verified 2026-10-29)
- e2b integrates with — E2B docs have a Opencode (SST) integration guide. (verified 2026-10-29)
- Fireworks AI integrates with — Fireworks AI docs integration: OpenCode (Nexus harness). (verified 2026-10-29)
- Laminar integrates with — Laminar integrations docs have a OpenCode observability page. (verified 2026-10-29)
- Langfuse integrates with — Langfuse's integrations directory has a Opencode (SST) integration page. (verified 2026-10-29)
- LangSmith integrates with — LangSmith docs have a tracing integration page for Opencode (SST). (verified 2026-10-29)
- Mastra Memory integrates with — Mastra repo ships @mastra/opencode, an OpenCode plugin for Mastra Observational Memory. (verified 2026-10-29)
- Mem0 integrates with — Mem0 docs have an OpenCode integration page (Add persistent memory to OpenCode with the Mem0 plugin: native SDK-backed memory tools, lifecycle hooks, and skills). (verified 2026-10-29)
- OpenRouter integrates with — OpenRouter docs have a cookbook page on using OpenCode with OpenRouter. (verified 2026-10-29)
- Portkey AI integrates with — Portkey docs have an OpenCode app/library integration page. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a OpenCode integration page. (verified 2026-10-29)
- Vercel AI Gateway integrates with — Vercel AI Gateway docs have a OpenCode coding-agent page. (verified 2026-10-29)
- Vercel AI SDK integrates with — AI SDK docs have an OpenCode AI SDK harness provider page. (verified 2026-10-29)