Which is better for long-running tasks, Claude Code or Codex?

For a single long continuous session, Claude Code has the edge: auto-compaction keeps the context window usable over hundreds of tool calls, and claude --continue resumes a session after a restart. For a high volume of short scoped tasks run headlessly, Codex's codex exec mode is the cleaner fit.

Is it cheaper to run Claude Code or Codex 24/7?

Roughly a tie if you use subscription login. Claude Code bills through a Claude subscription (Pro at $20/month, Max tiers above that) and Codex through a ChatGPT subscription (Plus at $20/month, Pro at $200/month). Both cap your spend at the subscription price. Per-token API billing is the expensive route at a 24/7 duty cycle for either agent.

Can I run Claude Code and Codex on the same hosting plan?

Yes. The Hivra Pro plan at $9.99/month includes up to 3 always-on agents, so one Claude Code box and one Codex box fit on a single plan, each on its own private VM with its own login.

Do I need API keys to host Claude Code or Codex?

No. On Hivra, Claude Code signs in with your own Anthropic account and Codex signs in with your own ChatGPT account, the same login flows the CLIs use on a laptop. Hivra never sees or stores either credential, and there is no markup on AI usage.

What happens when a hosted agent hits its subscription usage limit mid-task?

The agent stalls until the usage window resets, then continues; the session and the box stay alive. It is an argument for running both agents: when one subscription hits its cap, the other box keeps working.

Are the hosted versions of Claude Code and Codex modified?

No. Hivra runs the official Anthropic Claude Code CLI and the official OpenAI Codex CLI unmodified on private VMs. The browser interface (chat, terminal, files, skills) is a convenience layer around the standard CLIs.

Claude Code vs Codex for 24/7 autonomous work: which should you host?

The comparison everyone writes vs the one that matters

The standard Claude Code vs Codex article gives both agents a bug, watches for twenty minutes, and scores the diff. Useful if your agent lives in your IDE and you sit next to it. But a growing share of usage looks nothing like that. The agent runs on a machine that never sleeps, picks up tasks from a queue or a schedule, and you check in twice a day.

At that duty cycle the questions change:

What happens to a session at hour 6, not minute 20?
What does the context window do after 400 tool calls, and who cleans it up?
What does a month of near-continuous usage cost, and is that cost capped?
Can the agent recover a session after a restart, or does a reboot erase the work in progress?
How much babysitting does each one demand when nobody is watching?

Nobody scores those in the IDE comparisons. This article does.

One framing note before the details: both CLIs are excellent, both ship from their vendors as official terminal programs, and hosting does not change what they are. On Hivra they run unmodified, the exact binaries you would install yourself. So this is not a hosted-flavor comparison. It is the honest question of which upstream tool holds up better when the terminal never closes.

Long-running autonomy: compaction, resume, and session persistence

Claude Code was built with long sessions in mind and it shows in the plumbing:

Auto-compaction. When the context window fills, Claude Code summarizes older turns and keeps going. You can also trigger it manually with /compact. For a task that runs all night, this is the single most important feature, because every long-running agent eventually outgrows its context window.
Session resume. claude --continue picks up the most recent session and claude --resume lets you choose an older one. A VM reboot or a crashed terminal does not erase the work; you reattach to the conversation.
CLAUDE.md and skills. Project memory lives in files, not in the session, so knowledge survives restarts by design.
Headless mode. claude -p "prompt" runs a task non-interactively, which is what cron jobs and schedulers actually call.

Codex has grown the same organs, with different accents:

codex exec is the non-interactive lane, and it is a first-class citizen. For fire-and-forget batch work (run the tests, fix what broke, open a PR), codex exec is arguably the cleanest headless interface either vendor ships.
Resume support exists (codex resume), and AGENTS.md plays the project-memory role that CLAUDE.md plays on the other side.
Sandboxing and approval modes are more conservative by default. Codex is cautious about what it touches without a human confirming. Good instinct for an unattended box, but it means you spend more time up front configuring approval policy so a 3 a.m. run does not stall waiting for a yes.

The honest read: for one long continuous session that has to survive context exhaustion, Claude Code's compaction story is more mature. For a stream of small, well-scoped tasks executed headlessly, Codex's exec mode is a beautiful fit. Neither tool falls over at hour 9; they just fail differently when they fail, and Claude Code degrades more gracefully mid-marathon.

Subscription vs API cost at a 24/7 duty cycle

This is where the always-on framing changes the math completely. At twenty minutes a day, API-key billing is pocket change. At a 24/7 duty cycle, per-token API billing is an uncapped liability: a chatty agent in a retry loop can burn through real money overnight.

Both CLIs solve this the same way: log in with the subscription you already pay for.

Claude Code signs in with your Anthropic account. A Claude Pro subscription runs $20/month and the Max tiers ($100 and $200/month) exist for heavy usage. Usage is metered in rolling windows, so the worst case for a runaway agent is hitting the window cap and waiting, not a surprise bill.
Codex signs in with your ChatGPT account. ChatGPT Plus is $20/month with Codex usage included, and the Pro tier at $200/month raises the limits substantially. Same shape: hard ceiling, no meter running past it.

For autonomous work this cap is not a limitation, it is the feature. A capped subscription turns "what could this cost me" into a known number. Not sure which Claude plan a 24/7 workload actually needs? The Claude Code plan calculator does that estimate from your expected hours and intensity.

Where does the server itself fit in the bill? A DIY VPS adds $5-10/month per agent plus your admin time. On Hivra, hosting is a flat plan fee ($9.99/month Pro for up to 3 always-on agents) and there is zero markup on AI usage, because there is no AI usage to mark up: your Claude Code box bills through your Anthropic login and your Codex box bills through your ChatGPT login. Hivra never sees either credential. The full BYO model is covered in BYO API key explained.

What each needs from its server

The good news: neither agent is heavy. The model runs in the vendor's cloud; the CLI on your box is doing orchestration, file edits, and shell commands. Both install through npm and both run fine on a small VM. Hivra's free-tier boxes are 0.5 vCPU and 1 GB RAM and both CLIs launch there.

What actually moves the requirements:

Your workload, not the CLI. Compiling a Rust monorepo or running a fat test suite needs CPU and RAM regardless of which agent triggers it.
Disk. Repos, node_modules, build artifacts, and logs accumulate on any long-lived box. Budget for the project, not the agent.
Browser automation. If the agent drives a real Chrome instance for web tasks, that is the biggest single resource jump on the box. Chrome is hungrier than either CLI.
Headless auth. On a DIY server, both login flows involve shuttling URLs between the box and your laptop. Budget the friction once per agent. The setup mechanics are covered step by step in the Claude Code 24/7 guide and the Codex cloud guide.

Server requirements are a tie, and that is the point: infrastructure should not drive this decision. If you are still choosing where that server should live at all, the AI agent hosting guide compares the four real options.

Running both side by side on one plan

Here is the option the versus articles never mention: you do not have to choose.

The Hivra Pro plan at $9.99/month runs up to 3 always-on agents. One Claude Code box signed into your Anthropic account, one Codex box signed into your ChatGPT account, each on its own private VM, each with its own terminal, files, and chat in the browser. The third slot stays free for whatever else you run.

What side-by-side gets you in practice:

A real bake-off on your code. Give both the same task from your actual backlog and compare the PRs. One week of that beats every benchmark article, because it is scored on your repo, your stack, your conventions.
Workload routing. Once you see where each is strong, split the queue: marathon refactors to one box, batch fixes to the other.
Redundancy on usage windows. When one subscription hits its usage cap mid-day, the other box keeps working. Two capped subscriptions behave like a larger pooled budget.

If you already pay for both a Claude subscription and ChatGPT, the incremental cost of running both agents 24/7 is the single $9.99 hosting fee.

Verdict by workload type

No single winner. A winner per workload:

Long multi-hour tasks on one big codebase (deep refactors, migrations, "work through this 40-item checklist"): Claude Code. Compaction plus session resume is the difference between finishing and starting over.
High volume of small scoped tasks (nightly test-fix runs, dependency bumps, triage): Codex. codex exec plus a scheduler is a clean, boring pipeline, and boring is what you want at 3 a.m.
You already pay for Claude Pro or Max: Claude Code. Your marginal AI cost is zero.
You already pay for ChatGPT Plus or Pro: Codex. Same logic, other direction.
Web-heavy tasks that need a real browser: either CLI works; the deciding factor is a box with browser automation, which is a plan feature (Pro and up on Hivra), not a CLI feature.
You genuinely cannot decide: run both for a month on one Pro plan and let your own backlog pick the winner.

Try the comparison on your own backlog

Reading a verdict is worse than running one. Launch a Claude Code agent or a Codex agent on Hivra, sign in with the subscription you already have, and hand it a real task from this week's list. Both launch on the free tier, so the first experiment costs nothing. If the always-on version earns its keep, Pro at $9.99/month keeps up to 3 agents awake around the clock, and the calculator at /tools/claude-code-plan-calculator will tell you which Claude plan the workload actually needs.