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The Agents Index

Buyer's guide Terminal coding agents

The best Claude Code alternatives for the terminal

zot, Aider, OpenCode and GitHub Copilot CLI run Claude models from the terminal with a free plan, and add OpenAI models Claude Code lacks.

The Agents Index EditorialPublished 17 min readEditorial policy
Logos of zot, Aider, OpenCode, GitHub Copilot CLI, Claude Code. 5 agents compared, from $10 a month.
On this page
  1. The short answer
  2. Pick by what you need
  3. All 5 picks at a glance
  4. The picks
  5. Prices compared
  6. How we ranked
  7. Questions buyers ask
  8. Sources

The short answer

The top pick is zot, a single binary that reaches 30+ model providers and runs parallel subagents on one repository. Aider comes next for teams whose code must stay in-house, since it can run entirely against self-hosted models with no external API calls.

OpenCode at $10 a month and GitHub Copilot CLI at $10 a month cost less than Claude Code at $20 a month. OpenCode adds single sign-on and admin controls, and GitHub Copilot CLI uses Claude as its default model.

On 27 October 2026 we listed 194 agents: 9 of them under Terminal coding agents, 105 with a free plan and 116 confirmed for Claude. We asked Perplexity for alternatives to 4 of these 5 agents, on 13 October 2026.

  • Claude support is shared by all 5 picks, and Claude Code is the one that runs Claude models alone, with no OpenAI models.
  • Free plans come with zot, Aider, OpenCode and GitHub Copilot CLI, 4 of the 5, while Claude Code has no free plan.
  • OpenCode’s paid plan costs $10 a month, the same as GitHub Copilot CLI at $10 a month, and Claude Code has the dearest entry plan, at $20 a month.
  • Claude Code can serve other tools as an MCP server, and GitHub Copilot CLI, the other of the 2 of the 5 with MCP support, works as an MCP client with GitHub’s MCP server enabled.
  • Aider can run entirely against self-hosted models with no external API calls, and it installs on your own machine with pip, uv, pipx or Docker.

All 5 picks at a glance

Table 1 Price, free plan and the questions that separate them, checked 24 October 2026
ProductFromFree planClaudeWhole-codebase workMCP serverBest for
Free
Yes
Yes
Partly
–
forking sessions from any past turn
Free
Yes
Yes
–
No
automatic git commits of every edit
Free, then $10 a month
Yes
Yes
Partly
Partly
switching model providers per session
Free, then $10 a month
Yes
Yes
Yes
Yes
teams working from GitHub issues and pull requests
$20 a month
No
Yes
Yes
Yes
repo-wide migrations with many subagents

How we check

The picks

1. zot

Best for forking sessions from any past turn: zot’s fork command starts a new session from any past turn, and its tree view shows every session in the working directory as parents and children, so developers who try several approaches to one task can keep each one.

Price Free

zot is a single Go binary that drives 30+ model providers. Anthropic is a first-class provider, reached with an API key or by logging in with an existing Claude Pro or Max subscription. It runs as an interactive terminal interface, a one-shot print mode, a streamed event feed for tools, or a long-running subprocess you embed in apps written in any language.

There is no account, paid tier or sales contact. A one-line installer fetches the binary, and a local Ollama model gets it running on your own machine. Model usage is billed by whichever provider key or subscription you bring, and transcripts stay local and export to a portable session file.

Swarm runs several agents at once as separate processes, but they share one working directory with no per-agent branch isolation. Large repositories rely on the model’s context window and automatic compaction, because there is no repository index. A Telegram bridge mirrors a session to direct messages or runs the agent as a headless bot you drive remotely.

What it does well

  • Signs in to Claude with an API key or an existing Claude Pro or Max subscription.
  • Free to install and run, and a local Ollama model gets you started on your own machine.
  • Embeds in other software through a long-running subprocess and a TypeScript library for Node servers.

Where it falls short

  • The project calls itself “lightweight and in beta forever”, so plan for a fast-moving tool from an independent maintainer.
  • Subscription login for Anthropic and other providers reuses the app credentials published in each provider’s own command-line tool, a terms-of-service risk zot itself discloses.
  • Authentication is per-developer provider credentials, with no single sign-on.
  • Free plan: yes
  • Who it’s for: Developers who want a free single-binary harness written in Go that signs in to Claude with an API key or an existing Claude Pro or Max subscription.
  • Skip it if: Teams that need single sign-on for their developers should look at OpenCode, which includes it with every workspace.

2. Aider

Best for automatic git commits of every edit: Aider commits every accepted change with a descriptive message, so teams that review AI work in git history see each change as its own commit.

Price Free

Aider is an open-source terminal pair programmer that edits files in your local git repo and commits each accepted change. Aider names Anthropic Claude among the models it works best with, and its quick-start launches it with an Anthropic key. It connects to 14 backends, among them OpenAI, Gemini, DeepSeek, Ollama, OpenRouter, Amazon Bedrock and Vertex AI.

It is Apache 2.0 licensed software you install with pip, with no account, paid plan or sales call. Model usage is billed by the provider whose key you supply, so the real cost varies with use. It can run entirely against self-hosted models with no external API calls, for offline or restricted networks.

After edits it runs your lint and test commands and iterates on the failures it sees. Architect mode splits a task between a model that proposes and a model that writes the edits. Aider reports 81 to 88% accuracy on its own polyglot coding benchmark. Its loop ends at a local commit, and Aider documents no pull request or hosted pipeline integration.

What it does well

  • Every accepted change becomes its own git commit with a descriptive message.
  • Free Apache 2.0 software you install with pip.
  • Runs your lint and test commands after edits and fixes the failures it sees.
  • Runs entirely on self-hosted models for offline or restricted networks.

Where it falls short

  • It has no MCP server or client, so other agents cannot query it that way.
  • The default mode is interactive pair programming, and unattended runs need a single message plus blanket approval.
  • It holds no vendor compliance certifications, since it is self-managed open-source software.
  • Free plan: yes
  • Who it’s for: Developers who want a free open-source pair programmer that runs Claude with their own Anthropic key and keeps every edit in their local git history.
  • Skip it if: Teams that want the agent to open pull requests should look at GitHub Copilot CLI.

3. OpenCode

Best for reaching 75+ model providers: OpenCode connects to 75+ model providers, local models among them, which fits developers who want Claude and other models in one open-source agent.

Price Free, then $10 a month

OpenCode is an open-source coding agent for the terminal, desktop, code editors and the browser. Claude models work with an Anthropic API key, through OpenCode’s own gateway, or by connecting a Claude subscription directly. A GitHub Copilot or ChatGPT Plus or Pro login can drive it on models already included in that subscription.

The core is free. OpenCode Go costs $10 a month and Go Plus $40 a month, and OpenCode Zen bills per token as you go. Single sign-on is included with every workspace, with no enterprise tier required.

A build agent with full access and a read-only plan agent switch with Tab, and a general subagent handles multi-step searches. A headless server exposes sessions, messages, files and agents through an API with a generated library. In the GitHub flow it stops at a branch and a pull request.

What it does well

  • Connects to 75+ model providers, local models among them.
  • Single sign-on comes with every workspace.
  • Free core, with OpenCode Go at $10 a month.
  • Auto-approve mode and scheduled GitHub workflows run tasks unattended.

Where it falls short

  • A critical and a high-severity GitHub security advisory were published against it on 12 January 2026, the critical one a web interface flaw that could be chained into local command execution.
  • Go caps usage at $12 per 5-hour window, $30 per week and $60 a month, which is tight for heavy daily use.
  • Credits left when a workspace is deleted are lost outright.
  • Free plan: yes
  • Who it’s for: Developers and teams who want an open-source agent that runs Claude through an Anthropic key, OpenCode’s own gateway or a connected Claude subscription.
  • Skip it if: Teams that want one vendor’s model and agent together, with System and Organization Controls (SOC) 2 Type 2 and ISO 27001 artifacts in a public Trust Center, should look at Claude Code.

4. GitHub Copilot CLI

Best for teams working from GitHub issues and pull requests: GitHub Copilot CLI works with GitHub issues and opens pull requests on GitHub.com, which fits teams whose work already runs through GitHub issues and pull requests.

Price Free, then $10 a month

GitHub Copilot CLI plans, edits and runs code and works with issues and pull requests from the terminal. Claude is the default model, and further Claude versions are picked with the /model command. OpenAI models and Gemini models sit in the same picker. It ships with GitHub’s MCP server enabled and connects to custom MCP servers.

Copilot has a free plan, and paid access starts at $10 a month. Team plans bill per granted seat per month, $19 on Business and $39 on Enterprise.

Every file change and command needs approval by default, and autopilot mode and the blanket allow flag make unattended runs opt-in. Programmatic mode takes a single prompt and exits, so scripts drive it with a fine-grained personal access token. Auto-compaction keeps long sessions going past the token limit for legacy codebase work.

What it does well

  • Opens pull requests on GitHub.com.
  • Claude is the default model, with further Claude versions one command away.
  • GitHub’s MCP server comes enabled, and custom MCP servers connect too.
  • A free plan to start, with paid access at $10 a month.

Where it falls short

  • Works only against GitHub’s hosted Copilot, not GitHub Enterprise Server.
  • Single sign-on is not included on Free, Pro, Pro+ or Max.
  • Free plan: yes
  • Who it’s for: Developers who live in the terminal, track work in GitHub issues and pull requests, and want Claude as the default model.
  • Skip it if: Teams that must run the agent on their own machines should look at zot, which runs a local Ollama model with no account, since Copilot CLI works only against GitHub’s hosted Copilot.

5. Claude Code

Best for repo-wide migrations with many subagents: Claude Code runs many subagents over a repository for audits and large migrations, and Anthropic’s own example is a 500-file migration.

Price From $20 a month

Claude Code is Anthropic’s agentic coding tool. It edits your codebase, runs commands and opens pull requests. Claude is its only model family, with Fable, Opus, Sonnet and Haiku aliases. You can bring your own Anthropic key or your own Amazon Bedrock, Google Cloud or Microsoft Foundry account.

There is no free plan. Pro costs $20 a month billed monthly or $17 a month billed annually, and Max starts at $100 a month. Its entry plan is the dearest, at $20 a month.

Auto mode has a classifier approve tool calls, and routines and background sessions run unattended, including in the cloud. GitHub Actions and GitLab pipelines run it inside your own pipelines, and an agent library for Python and TypeScript exposes the same agent loop.

What it does well

  • Runs many subagents over a repository for audits and large migrations.
  • Publishes System and Organization Controls (SOC) 2 Type 2 and ISO 27001 artifacts at its Trust Center.
  • Works as an MCP server other clients connect to and as an MCP client.
  • Runs in GitHub Actions and GitLab pipelines.

Where it falls short

  • Claude is the only model family, so OpenAI and Gemini models are out.
  • Heavy users get pushed onto Max at $100 a month for more headroom.
  • The workflow ends at a commit, branch and pull request, and deployment is only whatever shell command it is allowed to run.
  • Free plan: no
  • Who it’s for: Teams standardized on Claude that want Anthropic’s own agent in the terminal, JetBrains and Visual Studio Code extensions, the web and GitHub Actions.
  • Skip it if: Developers who want OpenAI or Gemini models should look at zot, which reaches 30+ model providers from one binary.

Prices compared

Figure 1 · Entry price, a month Entry prices run from $10 a month to $20 a month; the median is $10 a month
  1. OpenCode$10 a month
  2. GitHub Copilot CLI$10 a month
  3. Claude Code$20 a month

Source: Each vendor’s pricing page, read between 21 October 2026 and 24 October 2026.

How we check

A paid plan on OpenCode costs $10 a month and on GitHub Copilot CLI $10 a month, which is also the median entry plan. Claude Code’s entry plan costs $20 a month, while zot and Aider have free plans.

“By default, copilot utilizes Claude Sonnet 4.5. Run the /model slash command to choose from other available models”

From GitHub Copilot CLI’s own page, read on 24 October 2026

How we ranked

We compared 5 agents on price, free plan and 3 questions a buyer asks, reading each vendor’s pricing page and product pages between 2 September 2026 and 24 October 2026. We did not sign up for or run any of them. Agents that answer yes to “Does it support Claude?” come first, then those that answer partly, each from the lowest starting price. We left out 2 that answer no or whose pages do not say. In all we answered 37 questions about what they do.

Questions buyers ask

Which Claude Code alternatives can still use Claude models?

All 5 run Claude models. zot reaches Anthropic with an API key or by logging in with a Claude Pro or Max subscription, and Aider launches with an Anthropic key. OpenCode takes an Anthropic key, its own gateway or a connected Claude subscription. GitHub Copilot CLI uses Claude as its default model, with more Claude versions under the /model command.

Is there a free alternative to Claude Code?

Yes: zot, Aider, OpenCode and GitHub Copilot CLI have a free plan, 4 of the 5. Claude Code has no free plan, so using it starts with a paid Claude plan.

How much does Claude Code cost compared with the alternatives?

Claude Code costs $20 a month, the dearest entry plan. Its Pro plan is $17 a month billed annually, and Max starts at $100 a month. OpenCode Go costs $10 a month and Go Plus $40 a month, and GitHub Copilot CLI costs $10 a month.

Which alternatives let me use OpenAI or open models instead of Claude?

zot, Aider, OpenCode and GitHub Copilot CLI run OpenAI models, and Claude Code does not. zot and OpenCode also accept a ChatGPT Plus or Pro login in place of an API key, Aider takes an OpenAI key, and GitHub Copilot CLI offers OpenAI models in its model picker. Claude Code lets you choose the model per session or subagent within Claude only, and every provider path it documents serves Claude models.

Which of these can run as an MCP server for other tools?

Claude Code does: it is one of the 2 of the 5 with MCP support, and it runs as an MCP server other clients connect to. GitHub Copilot CLI works as an MCP client, with GitHub’s MCP server enabled and custom servers supported. OpenCode consumes local and remote MCP servers, and other software can drive it through its API. Aider has neither an MCP server nor an MCP client.

Can I run a Claude Code alternative fully self-hosted?

Yes, with zot, Aider or OpenCode, and GitHub Copilot CLI is a client for GitHub’s hosted service. zot is one binary that keeps configuration, credentials and transcripts in a local state directory. Aider installs on your own machine and can run against self-hosted models with no external API calls, for offline or security-restricted environments. OpenCode runs on your own machine or server, and enterprises can point it at an internal AI gateway.

Are any Claude Code alternatives open source?

Yes: zot, Aider and OpenCode publish their source, and Claude Code does not. zot and OpenCode use a permissive open-source license that allows commercial use and modification, and Aider’s source is on GitHub under a permissive license. Claude Code’s public repository holds plugins, docs and the issue tracker under an all-rights-reserved license.

Sources

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