AgentHydra is free, with no account or subscription . Its cost view shows cost at API list prices by day, model, project and account . The supplied claims do not state a separate fee for that cost view. The Gemini CLI and opcode facts supplied here do not publish prices, so their prices are not stated.

Gemini CLI vs opcode (formerly Claudia) in 2026

Q: What does Gemini CLI do?

Gemini CLI provides lightweight access to Gemini . Its page says it can query and edit large codebases . The supplied facts also say Gemini CLI has not been optimized for Gemini 4 Argon . For a decision, compare those stated capabilities with the coding work and model access required.

Gemini CLI and opcode compared with AgentHydra on coding work, local data, setup, cost and the questions to check before you choose.

By SupaKeeper · 2026-10-29

SupaKeeper is published by LunarWerx, which makes some of the tools compared here.

Gemini CLI provides lightweight access to Gemini and can query and edit large codebases ^[1] ^[1]. opcode lets users create custom agents, manage interactive Claude Code sessions, and run secure background agents ^[2]. AgentHydra shows Claude Code, Codex and OpenCode sessions on your machine in one searchable list, updated live while they run ^[3]. The sources here do not give enough information to say that one tool meets every need, so check the specific work, account handling, local data and platform requirements that matter.

Option	What its sources say it does	Cost	Account or install
Gemini CLI	Provides lightweight access to Gemini ^[1]; can query and edit large codebases ^[1]	not published	Can be installed with Homebrew on macOS and Linux ^[1], MacPorts on macOS ^[1], npm ^[1], or run with npx without installation ^[1]
opcode (formerly Claudia)	Lets users create custom agents, manage interactive Claude Code sessions, and run secure background agents ^[2]; keeps all data on the user's machine locally ^[2]	not published	Requires Windows 10/11, macOS 11+, or Linux with Ubuntu 20.04+ ^[2]; requires at least 4GB of RAM, with 8GB recommended ^[2]
AgentHydra	Shows Claude Code, Codex and OpenCode sessions in one searchable live list ^[3]; can move Claude chats with history between accounts ^[3]	Free, with no account or subscription ^[3]	Tray app needs Windows; macOS and Linux builds exist but have not been verified ^[3]

The short answer

Gemini CLI provides lightweight access to Gemini and can query and edit large codebases ^[1] ^[1]. opcode lets users create custom agents, manage interactive Claude Code sessions, and run secure background agents ^[2]. AgentHydra puts Claude Code, Codex and OpenCode sessions on your machine into one searchable list that updates while they run ^[3]. It can also let you reply in a Claude session, including sending one message to several sessions ^[3]. Choose based on the task the sources say each tool handles. Gemini CLI is described for access to Gemini and work across large codebases ^[1] ^[1], while opcode is described for custom agents and interactive Claude Code sessions ^[2].

What Gemini CLI, opcode (formerly Claudia) is built for

Gemini CLI provides lightweight access to Gemini ^[1]. Its page says it can query and edit large codebases ^[1]. Its page also says Gemini CLI has not been optimized for Gemini 4 Argon ^[1]. opcode lets users create custom agents, manage interactive Claude Code sessions, and run secure background agents ^[2]. opcode keeps all data on the user's machine locally ^[2]. Its stated requirement is at least 4GB of RAM, with 8GB recommended ^[2]. opcode is licensed under the AGPL License ^[2]. These statements describe different kinds of work, so the relevant source depends on whether the need is Gemini access, large codebase work, or Claude Code sessions and custom agents.

What AgentHydra is built for

AgentHydra is made by the team that publishes this site. It shows Claude Code, Codex and OpenCode sessions on your machine in one searchable list, updated live while they run ^[3]. It lets you type a reply into a Claude session's own desktop chat, or send one message to several sessions ^[3]. It can move a Claude chat, history included, to another one of your accounts ^[3]. It can split a task's pieces across Claude Code CLI sessions on your accounts and move a worker to another account when one nears its limit ^[3]. It shows cost at API list prices by day, model, project and account ^[3]. It can pair failed shell commands with the commands that fixed them and copy those pairs out as a rules file for agents ^[3]. It can expose its features as MCP tools, including account and quota checks ^[3].

Pricing and fees

The supplied Gemini CLI facts do not publish a price, so the price is not published here. The supplied opcode facts do not publish a price, so the price is not published here. AgentHydra is free, with no account or subscription ^[3]. Its cost view uses API list prices ^[3]. The supplied facts do not state a separate fee for using that view. If price is a deciding factor, check the current pricing information for Gemini CLI and opcode before choosing, because the facts provided here do not give a dollar amount for either rival ^[1] ^[2].

Setting it up and daily use

Gemini CLI can be installed globally on macOS and Linux with Homebrew ^[1], installed on macOS with MacPorts ^[1], installed globally with npm ^[1], or run with npx without installation ^[1]. opcode requires Windows 10/11, macOS 11+, or Linux with Ubuntu 20.04+ ^[2]. It requires at least 4GB of free RAM, with 8GB recommended ^[2]. Its page says release executables will be published soon ^[2]. AgentHydra's tray app needs Windows, while macOS and Linux builds exist but have not been verified ^[3]. On Windows, AgentHydra can be installed with a one-line PowerShell script, downloaded from GitHub Releases, or run from source with Bun ^[3].

Things to check before you choose

Check which model or coding work you need, because Gemini CLI provides access to Gemini and can query and edit large codebases ^[1] ^[1]. Check whether local data handling matters, because opcode says all data stays on your machine ^[2]. Check the computer requirements if opcode is under consideration, including its stated minimum RAM requirement ^[2]. Check whether you need one view of Claude Code, Codex and OpenCode sessions, since AgentHydra provides that searchable live list ^[3]. Check whether account limits, cost views or moving Claude chats matter, since AgentHydra provides those functions ^[3] ^[3] ^[3].

How to choose

For lightweight access to Gemini, Gemini CLI is described as providing that access ^[1]. For querying and editing large codebases, Gemini CLI's source says it supports that work ^[1]. For custom agents and interactive Claude Code sessions, opcode's source describes those functions ^[2]. For keeping Claude Code, Codex and OpenCode sessions in one searchable live list, AgentHydra provides that view ^[3]. For moving Claude chat history between accounts, AgentHydra provides that function ^[3]. For viewing costs by day, model, project and account at API list prices, AgentHydra provides that view ^[3].

Frequently asked questions

What does Gemini CLI do?

Gemini CLI provides lightweight access to Gemini ^[1]. Its page says it can query and edit large codebases ^[1]. The supplied facts also say Gemini CLI has not been optimized for Gemini 4 Argon ^[1]. For a decision, compare those stated capabilities with the coding work and model access required.

What does opcode (formerly Claudia) do?

opcode lets users create custom agents, manage interactive Claude Code sessions, and run secure background agents ^[2]. Its page says all data stays on the user's machine locally ^[2]. It also states a minimum of 4GB of RAM, with 8GB recommended ^[2]. Check those requirements against the computer where opcode will run.

Is AgentHydra free?

AgentHydra is free, with no account or subscription ^[3]. Its cost view shows cost at API list prices by day, model, project and account ^[3]. The supplied claims do not state a separate fee for that cost view. The Gemini CLI and opcode facts supplied here do not publish prices, so their prices are not stated.

Can AgentHydra manage several coding sessions?

AgentHydra shows Claude Code, Codex and OpenCode sessions on your machine in one searchable list, updated live while they run ^[3]. It can also split a task's pieces across Claude Code CLI sessions on your accounts and move a worker to another account when one nears its limit ^[3]. That gives the product specific functions to compare with the session work described by opcode.

Can AgentHydra move a Claude chat to another account?

Yes. AgentHydra can move a Claude chat, including its history, to another one of your accounts ^[3]. It can also type a reply into a Claude session's own desktop chat or send one message to several sessions ^[3]. If account-to-account chat movement or multi-session replies matter, those are specific functions to check.

Free, with no account or subscription. ^[3]

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