# How Developers Should Choose a Coding Agent

> Source: The Agents Index — https://theagentsindex.com/blog/how-developers-should-choose-a-coding-agent (sourced research)
> By The Agents Index Editorial · Published 2026-10-11

_Learn how coding agents differ in workflow, model choice, control, deployment, and cost, and what to check before choosing one._

## What developers need from these agents

Start with the work you want an agent to do. Some fit interactive editing in an IDE or terminal; others take a ticket, work asynchronously, and return a pull request. Check whether the agent can edit across files, write tests, debug failures, review changes, and run in your CI pipeline. A pull request is not the same as a deployment: confirm where the workflow stops.

Model choice and execution are just as important. Find out whether you can select a provider, bring your own key, use local models, or run the agent on your own machines. Check approval defaults and permission controls before allowing unattended work. For teams, consider administration, audit records, data handling, and the full billing meter. A free client may still require a separate model provider bill.

## [Gemini Code Assist](/gemini-code-assist)

Gemini Code Assist fits teams using VS Code or JetBrains and already on Google Cloud. It includes IDE assistance and the Gemini CLI. Enterprise adds private-repository customization and Agent Mode for multi-step, multi-file work, but Agent Mode remains a preview and is not included in Standard. Developers who need that workflow should account for the limitation.

There is no free tier. Standard starts at $19/user/month billed annually or $22.80/user/month billed monthly; Enterprise starts at $45/user/month billed annually or $54/user/month billed monthly. Both include a 30-day free trial for up to 50 users. Gemini is the only model family, the service is managed rather than self-hosted, and there is no customer-facing API. The default asks for approval on plans and tool calls; autonomous modes are opt-in.

## [Goose](/goose)

Goose suits developers who want open-source software they run themselves and the freedom to choose a model provider. It offers a desktop app, CLI, editor use through ACP, an embeddable API, and more than 70 MCP extensions. It can run subagents, use local open-weight models, and export sessions. The software is free and open source under Apache 2.0; model-provider costs are separate.

That flexibility means setup and operational responsibility. Goose runs autonomously by default, and its default permissions allow shell commands and file writes without asking. Set permissions to match your needs. Tool records are stored locally, rather than in a central administrative audit trail, and no vendor support tier or SLA is documented.

## [Augment Code](/augment-code)

Augment Code is suited to teams looking for longer software-delivery loops. Agents can start from development and project tools, work in parallel, investigate CI failures, fix review findings, and take tasks through a pull request. Execution can run in Augment's cloud or on a team's machines, but the control plane and inference remain with Augment. The platform offers multiple model families and a shared team usage balance.

Business costs $100/month for up to 50 seats; usage costs are additional and depend on workload. Metering includes provider-priced LLM tokens, a 40% service fee on LLM, and $0.19/hour Cosmos compute. Review this cost structure alongside the flat plan price. Augment's published performance figures are vendor claims, not independent benchmarks.

## [Devin](/devin)

Devin fits asynchronous delegation: assign a scoped task, let it work in its own environment, and review its pull request. It can write and test code, fix bugs, and delegate work to parallel sessions. A Free plan is available; paid plans are Pro at $20/mo, Max at $200/mo, and Teams from $80/mo, with full seats at $40 each.

The listing describes 12 to 15 minutes between responses and cites independent testing that found roughly 15% real-world task success on a 20-task sample, compared with Devin's reported 45.8% on SWE-bench Verified. Treat performance as task-dependent. Ask whether the response pace fits your work, and account for usage-billed review features. Devin hands work back as a pull request; your team merges and ships through its existing pipeline.

## [OpenCode](/opencode)

OpenCode fits developers who want an open-source terminal agent, local execution, and broad model choice. The core software is free, works with local models and more than 75 providers, and offers plan and build agents, subagents, MCP support, and a headless HTTP server. It can also run in GitHub Actions. The Zen gateway is optional and meters usage per token. OpenCode Go is $5 for the first month, then $10/month.

You operate the software yourself, rather than using a turnkey hosted service with a conventional support contract. Two 2026 security advisories affecting the web UI chain and local HTTP server have been patched; take care with server exposure on shared or untrusted networks. An open issue tracks memory-growth reports in the terminal interface.

## [Zed](/zed)

Zed combines a code editor with an agent panel and support for external agents through ACP. It suits developers who want to choose among compatible agents rather than commit to one editor's built-in agent. The Personal plan is free, Pro is $10/month, and Business is $30/seat/month. Developers can bring their own model keys or use local models.

Zed's extensions page describes hundreds of community extensions, and remote development requires your own SSH-reachable server rather than a managed cloud environment. The agent has no CI runner or pull-request workflow. Hosted model use beyond included credits is charged at provider list price plus ten percent, so consider subscription and usage together.

## [Claude Code](/claude-code)

Claude Code suits developers who want a terminal-native agent that can work across a repository, run commands, write tests, and fit into scripts and CI. It has an Agent SDK, supports GitHub Actions and GitLab CI/CD, and can use subagents. Permissions start read-only in Manual mode, with configurable approval rules and other permission modes.

Claude is the only model family, even when using a supported cloud provider or bringing an Anthropic key. There is no free tier for Claude Code: Pro is $17/month billed annually or $20/month billed monthly, and Max starts at $100/month. Usage-based costs can rise on large or long-running tasks. Developers who want a full graphical editing experience may prefer another option.

## [Cline](/cline)

Cline fits developers who want an open-source agent, model choice, and configurable permissions. Its free client supports VS Code, JetBrains, CLI, CI, and an SDK; it can use provider keys or local models, run subagents, and perform code review and test-writing tasks. The core is free under Apache 2.0. ClinePass is $9.99/month for 2-5x rate limits on curated open-weight models; hosted usage-billing and custom-priced Enterprise are other options.

The free core requires you to supply a model key and pay the provider, with no bundled cap on those costs. Results depend on the model you choose. Enterprise adds governance and support at a custom price. The Kanban interface is a research preview, so check whether its maturity suits your workflow.

## [Letta](/letta)

Letta is aimed at developers building agents that need persistent memory across sessions, rather than only a coding assistant for a bounded task. Its agents can work with repository files, run from a CLI or API, and connect to editors through ACP. The harness is open source; developers can run locally or self-host the App Server. The Free plan covers three stateful agents; Pro is $20/month for up to 20 agents.

Check the language and operating model. The active harness is TypeScript, which may not suit Python-only teams, though a Python SDK is available. The ecosystem is smaller than established agent frameworks, and no SOC 2 or ISO 27001 attestation is published in the supplied facts. Hosted messages may train future models; local state or your own model backend avoids that collection.

## [Junie](/junie)

Junie makes sense for developers already working in JetBrains IDEs. Its Plan Mode, project context, and Agentic Debugging can use the IDE's debugger. It also runs through a CLI and CI integrations, and supports multiple model providers, personal keys, and local models. An AI Free plan is available, and individuals can use their own provider key indefinitely.

Costs use shared JetBrains AI Credits, which also cover other AI Assistant features; agentic work can consume credits faster than basic completion. Individual AI Pro is $10/month for 10 credits and AI Ultimate is $30/month for 35 credits. Organization AI Pro is $20/month per seat for 20 credits, and AI Ultimate is $60/month per seat for 70 credits. Agentic Debugging does not carry over to other editors, and Junie is proprietary.

## How to choose

Match the agent to the work and the environment. For interactive editing, compare editor support, model options, and approval controls. For background tasks, check how the agent receives work, where it runs, and whether it stops at a diff, branch, or pull request. Confirm what your team must do to merge and deploy. Vendor benchmarks and capability claims do not establish fit for your tasks.

Then check the operating constraints: model restrictions, data handling, permissions, audit needs, administration, and the complete billing meter. Goose, OpenCode, and Cline offer open-source options; Letta focuses on persistent agent memory. Gemini Code Assist, Junie, and Zed may suit teams whose work is tied to their respective cloud or editor environments. Confirm whether inference is included or billed separately, and whether usage charges apply on top of a subscription.

## Sources

- [Gemini Code Assist](https://codeassist.google)
- [Goose](https://goose-docs.ai)
- [Augment Code](https://www.augmentcode.com)
- [Devin](https://devin.ai)
- [OpenCode](https://opencode.ai/)
- [Zed](https://zed.dev)
- [Claude Code](https://claude.com/product/claude-code)
- [Cline](https://cline.bot)
- [Letta](https://www.letta.com)
- [Junie](https://www.jetbrains.com/junie/)

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Tags: buyer-guide