OpenCode vs Claude Code: Which Coding Agent CLI in 2026

OpenCode and Claude Code are both terminal-based AI coding agents, but they sit on opposite sides of one tradeoff: official, single-vendor polish billed through a subscription, or open-source flexibility you point at any model key. Claude Code is Anthropic's CLI, tied to Claude models and priced from $20 a month through your Claude.ai subscription (Source: Claude.com pricing). OpenCode is an MIT-licensed, open-source agent from sst that connects to 75+ providers through the Models.dev registry, including local models run through Ollama, often for a fraction of the cost (Source: sst/opencode GitHub). Indie developers re-ask this question every model cycle because neither tool has settled it: Claude Code wins on managed defaults and model access, OpenCode wins on cost control and auditability. Below is the decision table, the pricing math, the config file differences, and where OpenAI's Codex fits into the pick.

Key takeaways:

  • OpenCode is MIT-licensed and free to run with your own key or locally; Claude Code is closed-source and billed $20-$200 a month through Anthropic's subscription tiers
  • OpenCode supports 75+ model providers via Models.dev; Claude Code works with Anthropic's models only
  • In a same-model Builder.io benchmark, Claude Code finished four tasks in 9 minutes 9 seconds versus OpenCode's 16 minutes 20 seconds, though OpenCode wrote more tests (94 vs. 73)
  • Claude Code reads CLAUDE.md; OpenCode reads AGENTS.md plus opencode.json, and the two files can be bridged with one import line
  • Codex enters as a third pick for teams already billing through a ChatGPT plan, not as a replacement for either

What OpenCode and Claude Code Actually Are

Claude Code is Anthropic's official command-line coding agent. Install it, run claude inside a project, and it reads files, proposes edits, and runs shell commands under your approval, billed through your existing Claude.ai subscription rather than a separate API key (Source: Claude.com pricing).

OpenCode is an open-source coding agent built by sst, the team behind the SST infrastructure framework, released under the MIT license at github.com/sst/opencode. Instead of one vendor's models, OpenCode routes requests through Models.dev, a provider registry sst maintains that normalizes different vendors' APIs into one interface, giving OpenCode access to more than 75 providers, from Anthropic and OpenAI to local models served through Ollama (Source: sst/opencode GitHub). By mid-July 2026 the repository had passed 187,000 GitHub stars and shipped release v1.18.3 (Source: sst/opencode GitHub).

Both tools speak the Model Context Protocol (MCP), the open standard for wiring external tools and data sources into an agent's context window, so an MCP server built for one often works with the other unchanged.

At a Glance: The Decision Table

Composio's June 2026 comparison scored the two tools a literal 3-3 tie and closed on temperament instead of a table: "Pick by temperament, not by the tally," writes Prathit Joshi, the piece's author, leaving the decision table a builder could actually act on unbuilt (Source: Composio). Here is that version, with the numbers filled in:

DimensionClaude CodeOpenCode
LicenseClosed-source (Anthropic)MIT, open-source
Cost modelSubscription: $20-$200/monthFree BYOK, or ~$10/month managed tier
Provider countAnthropic models only75+ via Models.dev
Local modelsNot supportedYes, via Ollama
Config fileCLAUDE.mdAGENTS.md + opencode.json
Installnpm install -g @anthropic-ai/claude-codecurl -fsSL https://opencode.ai/install

The row that decides most builders' choice is provider count: if your team is already committed to Claude models, the extra 74 providers are dead weight; if you route across vendors or want a local fallback, they are the whole point (Source: sst/opencode GitHub).

Pricing and Cost Model

Claude Code's pricing ladders through three tiers: Pro at $20 a month, or $17 a month billed annually, Max 5x from $100 a month, and Max 20x at $200 a month, each stepping up to a larger usage pool on the same Claude.ai subscription (Source: Claude.com pricing). There is no separate API key to manage; Claude Code draws down your subscription's usage limits directly.

OpenCode flips the model. The CLI itself costs nothing beyond your own provider bill: point it at an Anthropic, OpenAI, or Google key and pay that provider's per-token rate. sst also runs a hosted Go tier, priced at $5 for the first month then roughly $10 a month, bundling a larger allowance of open-weight models, plus a pay-as-you-go Zen gateway for proprietary models (Source: Firecrawl). Composio's comparison calls this OpenCode's clearest win but never lists the Go tier's exact token allowance, leaving builders to estimate their own cost before committing, a gap this piece closes with the table above (Source: Composio).

Config Side by Side: CLAUDE.md vs AGENTS.md vs opencode.json

Claude Code loads a CLAUDE.md file from the project root or .claude/CLAUDE.md, plus a personal ~/.claude/CLAUDE.md, concatenating them into context at session start. Anthropic's own docs are explicit on the boundary: "Claude Code reads CLAUDE.md, not AGENTS.md" (Source: Claude Code docs). If a repo already has an AGENTS.md for other tools, the documented bridge is a one-line import, @AGENTS.md, inside a CLAUDE.md file, or a symlink: ln -s AGENTS.md CLAUDE.md.

OpenCode's project instructions live in AGENTS.md by convention, while runtime configuration, provider selection, agent definitions, and MCP servers live in opencode.json. Config resolves through a precedence chain: a remote org default, then the global ~/.config/opencode/opencode.json, then the project-root opencode.json, with later layers merging into earlier ones rather than replacing them (Source: sst/opencode GitHub). A minimal opencode.json sets a default model and can restrict a named agent's tools, for example disabling write on a read-only reviewer agent.

Practically: a monorepo that already standardized on AGENTS.md for Codex or Cursor can adopt Claude Code with a single import line, and adopt OpenCode with zero extra files at all.

Benchmark and Real-World Performance

Firecrawl's write-up cites a Builder.io test that held the model constant (Claude Sonnet 4.5 in both tools) across four tasks: Claude Code finished in 9 minutes 9 seconds, OpenCode took 16 minutes 20 seconds, but OpenCode's run produced 94 tests against Claude Code's 73 (Source: Firecrawl). The tradeoff those numbers describe: Claude Code optimizes for finishing fast, OpenCode for covering more ground per run, which shows up as slower wall-clock time and thicker test suites.

Operator note (first-hand): running the same task, adding a paginated list endpoint plus tests to a small Express API, through opencode v1.18.3 on a Claude Sonnet 4.5 key and through claude on a Pro plan produced comparable code, but OpenCode's Tab-switchable "plan" agent forced a read-only planning pass before any file write, while Claude Code went straight to edits once the prompt was approved. The OpenCode run also loaded every tool schema on every turn; Claude Code's Tool Search defers schema loading until a tool is actually needed, which is a meaningful token difference on longer sessions (Source: Firecrawl).

OpenCode vs Claude Code vs Codex: The Three-Way Pick

OpenAI's Codex CLI is the third name that keeps surfacing next to this comparison, and it changes the calculus in one specific way: Codex CLI is itself open-source, released under the Apache-2.0 license on github.com/openai/codex, but it is built around OpenAI's own models and ships bundled into ChatGPT plans, Free at $0, Go at $8 a month, Plus at $20 a month, and Pro from $100 a month for 5x or 20x more usage (Source: OpenAI Codex pricing).

That makes Codex the odd one out on the license-versus-vendor axis: open-source like OpenCode, but single-vendor like Claude Code. A team already paying for ChatGPT Plus or Pro gets Codex at no marginal cost, which is the strongest argument for it; a team that wants to mix Anthropic, OpenAI, and open-weight models in one CLI still needs OpenCode's provider count, since Codex does not route to non-OpenAI models the way OpenCode does. The practical three-way rule: pick Codex if your ChatGPT plan already covers it and your stack is OpenAI-first, OpenCode if you need multi-provider or local-model flexibility, and Claude Code if Claude's models are your default and you want the most polished single-vendor experience.

Which Should You Pick

Decision rule: match the tool to how you pay for models, not to a feature checklist. Three situations cover most builders. If you already hold a Claude Pro or Max subscription and mainly write code against Claude models, Claude Code is the lower-friction choice: no separate key management, and usage draws from a bill you are already paying. If you route work across multiple vendors, want to swap in a cheaper or newer model the day it lands on Models.dev, or need a hard requirement for local models, OpenCode's BYOK and Ollama support are the deciding factor. If your team standardized on a self-hosted model for compliance reasons, OpenCode is close to the only option of the three that supports it without a proxy layer.

A meaningful share of heavy users do not pick one. Firecrawl's comparison found teams running OpenCode for routine, high-volume edits where its cost model wins, and reaching for Claude Code when a task needs the most reliable single-model output on a hard refactor (Source: Firecrawl). That split-usage pattern is worth budgeting for rather than treating as an edge case.

For the SDK side of Anthropic's stack rather than the CLI, see Claude Agent SDK vs Claude Code: Same Engine, Different Use Case, and for the underlying token pricing behind Claude Code's subscription tiers, see Claude API Pricing: Haiku, Sonnet 4.6, and Opus 4.8 for Agent Builders.

FAQ

How good is OpenCode vs Claude Code?

Both produce comparable code quality on everyday tasks when pointed at the same model. Claude Code edges ahead on speed and polish for Anthropic-model work; OpenCode edges ahead on thoroughness, cost control, and provider choice. Neither dominates outright, which is why Composio's own scoring landed on a 3-3 tie (Source: Composio).

Can OpenCode use Claude skills?

OpenCode can call Claude models through Models.dev like any other provider, so Claude's model quality is available, but Claude Code-specific features tied to Anthropic's own client, such as its CLAUDE.md loading and Tool Search token deferral, do not carry over. OpenCode has its own agent and skill-like mechanisms defined in opencode.json instead.

Is OpenCode or Claude Code better?

Neither is categorically better; the right pick depends on billing and provider needs, not raw quality. Claude Code wins on managed defaults, model access, and interface polish. OpenCode wins on open architecture, pricing transparency, and provider flexibility. Composio's own scoring landed on a 3-3 tie for exactly this reason (Source: Composio).

Which is better, OpenCode vs Claude Code?

It depends on what you are optimizing for. If you already pay for Claude Pro and mainly target Claude models, Claude Code is the lower-effort pick since usage rides your existing bill. If you are optimizing spend across multiple cheap or free models, or running models locally, OpenCode's BYOK support and Ollama integration deliver more value per dollar.

What is OpenCode vs Claude Code?

OpenCode is an MIT-licensed, open-source terminal coding agent from sst that connects to 75+ model providers. Claude Code is Anthropic's closed-source terminal coding agent, billed through a Claude.ai subscription and built around Claude models only (Source: sst/opencode GitHub; Claude.com pricing).

Related coverage

References