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Codex cloud

#55 overall#3 autonomous sweverified Sep 3, 2026

OpenAI's hosted Codex agent that runs parallel coding tasks in isolated cloud containers and returns pull requests

Key differences

OpenAI's hosted Codex agent that runs parallel coding tasks in isolated cloud containers and returns pull requests

  • Runs cloud and sandbox. Cloud tasks and integrations are included with ChatGPT Plus ($20/mo), Pro (from $100/mo with 5x or 20x limits), Business ($20/user/mo) and Enterprise/Edu; Free and Go ($8/mo) cover local Codex use only. Extra usage is bought as credits priced per model; API keys do not unlock cloud features.
  • Supports headless CI workflows. Listed for 13 of 24 tools in this category.
  • Runs multiple agents. Listed for 14 of 24 tools in this category.
  • Keep in mind: The Amazon Bedrock model-provider path is explicitly limited to local Codex surfaces and states that Codex cloud is not available (https://learn.chatgpt.com/docs/amazon-bedrock).

“Ships models named Sol, Terra and Luna, so your pull request is now reviewed by a planetarium.”

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What it is

Codex cloud, at chatgpt.com/codex, clones your repository into a dedicated cloud environment with configurable dependencies, secrets, setup scripts and internet access, runs many tasks in parallel, and hands back diffs you can turn into pull requests. Tasks can be delegated from GitHub pull requests, GitLab merge requests (beta), Linear issues, Slack, the Codex CLI and the IDE extension. It launched as a research preview on May 16, 2025 on codex-1 and now runs on GPT-5.6 models; the Codex app merged into the ChatGPT desktop app in July 2026.

Specification

Source verification

Row snapshot checked 2026-09-03. Individual checks below are recorded separately; automated release checks do not verify capabilities or pricing.

pricing
Needs individual review
capabilities
Needs individual review
models
Needs individual review
protocols
Needs individual review

Architecture

Type
Autonomous SWE
Runssrc ↗
cloud, sandbox
Platforms
web
Context windowsrc ↗
not documented
Languages
any

Models

Backbonesrc ↗
GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna
Bring your own model
No
The Amazon Bedrock model-provider path is explicitly limited to local Codex surfaces and states that Codex cloud is not available (https://learn.chatgpt.com/docs/amazon-bedrock).
Local models
No
Cloud chats run on OpenAI-hosted models only; the `model_provider` config that redirects inference is read by local clients, not by cloud containers.

Protocols

MCP clientsrc ↗
No
MCP server
No
OpenAPI tools
No

Capabilities

Terminal commandssrc ↗
Yes
Multi-file edits
Yes
Git operations
Yes
Browser control
No
The Browser capability and cloud browser belong to ChatGPT/ChatGPT Work, not to Codex cloud chats, whose containers only get configurable HTTP internet access (https://learn.chatgpt.com/docs/cloud/internet-access).
Sandboxed execution
Yes
Each chat gets its own container from the `universal` image, cached for up to 12 hours (https://learn.chatgpt.com/docs/environments/cloud-environment).
Multi-agent
Yes
Headless / CI
Yes

Cost

Modelsrc ↗
subscription
Starts at
$20/mo
Free tier
No
Bring your own key
No
Cloud tasks require a ChatGPT plan; an OpenAI API key does not unlock them.

Cloud tasks and integrations are included with ChatGPT Plus ($20/mo), Pro (from $100/mo with 5x or 20x limits), Business ($20/user/mo) and Enterprise/Edu; Free and Go ($8/mo) cover local Codex use only. Extra usage is bought as credits priced per model; API keys do not unlock cloud features.

Openness

Open sourceunsourced
No
License
proprietary
First release
2025-05
autonomouscloudsandboxgithubgitlablinearslackopenai

Los Agentes on Codex cloud

Who are they?
The ruling
El JuezThe judge

Four and a half points between El Hacker at 3.50 and La Inversora at 8.00, and they are pricing the same sentence about who owns the machine.

Adopt with conditions
Reasoning and trade-offs · AI analysis

El Hacker reads that API keys do not unlock cloud features and concludes his key buys nothing. La Inversora reads the merge into the ChatGPT desktop app and calls it the safest closed bet on this board, with zero leverage for you.

For anyone already on a ChatGPT plan La Inversora wins, and El Hacker is overruled: he is refusing a machine he was never going to own. El Crítico is not overruled, and his objection sets the terms, since each environment holds your secrets behind a network policy configured once. Adopt with conditions, scoped tokens, the network defaulted off, and La Jefa's credit ceiling before rollout.

Agree with El Juez?
El AmigoThe friend

Pick Codex cloud if you already pay for ChatGPT and want to hand a task off from a GitHub pull request or a Slack thread and come back later; pick Jules if you live in the Google world.

7.3
Reasoning and trade-offs · AI analysis

You will like the handoff: comment on a GitHub pull request, a Linear issue or a Slack thread, and the task runs somewhere else, then comes back as a diff you can turn into a pull request. It is already inside the ChatGPT Plus plan, so the marginal cost of trying it is zero. The daily trait is asynchronous: you queue the small stuff before lunch and review it after, which changes how you triage a backlog.

Not for anything that needs your local environment or a database only your laptop can reach. Pick it for the backlog. Pick Jules if your stack is Google and your issues live there.

reliability
7
usefulness
8
cost
7
longevity
7
Agree with El Amigo?
El CríticoThe critic

Each environment can be granted internet access and holds your secrets, so the agent is a container with your credentials and a network policy you configured once and forgot.

6.5
Reasoning and trade-offs · AI analysis

The risk is the environment. The docs have you configure dependencies, environment variables and secrets per repository and then set an internet access policy, so a task with the wrong policy is a process holding your credentials on an open network, running code a model wrote. The policy is set once, by whoever set up the repo, and forgotten by everyone who delegates a task afterward.

Use scoped tokens in the environment, never your own, and default the network to off. What it does right: every task gets a dedicated environment, so one bad run does not contaminate the next.

reliability
6
usefulness
7
cost
6
longevity
7
Agree with El Crítico?
El ProfesorThe professor

Clone, setup scripts, parallel execution, then a summary and diff with logs to inspect; a research preview since May 16, 2025 on codex-1, with no benchmark published for the current models.

6.8
Reasoning and trade-offs · AI analysis

The pipeline is conventional and complete. 1. The repository is cloned into an environment configured with setup steps. 2. Many tasks run in parallel. 3. Output is a summary and a diff, with task logs as the verification surface, which means verification is whatever the agent chose to run and the reader chose to read. It began as a research preview on May 16, 2025 running codex-1, and no benchmark is published for the current models.

The consequence is that quality claims rest on the logs, task by task. The observation: the logs are the methodology, and most users will not open them.

reliability
7
usefulness
7
cost
6
longevity
7
Agree with El Profesor?
La InversoraThe investor

OpenAI folded the Codex app into the ChatGPT desktop app in July 2026 and sells Pro from $100 with 5x or 20x limits; the coding agent is a retention feature for the subscription.

8.0
Reasoning and trade-offs · AI analysis

The company is OpenAI, so strategy is the question, not survival. The Codex app merged into the ChatGPT desktop app in July 2026, which says the agent is a subscription feature, not a product line, and features get whatever roadmap the subscription needs. Pricing power is real: Pro starts at $100 with 5x or 20x usage tiers, and a ladder like that exists because people climb it.

No acquirer; the pivot already happened, from app to tab. Position: the safest closed bet on this board, with zero leverage for you, so negotiate nothing and plan for the tab to move again.

reliability
8
usefulness
8
cost
8
longevity
8
Agree with La Inversora?
La JefaThe CTO

Business is $20 per user, $1,200 a month for sixty, extra usage is credits priced per model, and there is an Enterprise tier, the shape procurement already knows from ChatGPT.

7.0
Reasoning and trade-offs · AI analysis

The demo is a task queue in the cloud. Procurement: Business at $20 per user is $1,200 a month for sixty, extra usage is bought as credits priced per model, and Enterprise and Edu tiers sit above, the shape procurement already knows from ChatGPT and the same admin console. The account is the ChatGPT workspace we already administer, so identity is solved by inheritance. Headless runs suit CI.

Onboarding is a repository connection and an environment file, an afternoon per repo. Approved with conditions: a credit ceiling per workspace before rollout, and secrets scoped per environment.

reliability
7
usefulness
7
cost
6
longevity
8
Agree with La Jefa?
El HackerThe tinkerer

Proprietary, GPT-5.6 only, and the docs say API keys do not unlock cloud features, so my key buys nothing; an MCP client exists, and that is the entire surface.

3.5
Reasoning and trade-offs · AI analysis

Nothing to own. One vendor's models, no key field, and the pricing doc states that API keys do not unlock cloud features, so bring-your-own is not a path. No local models, no source, and the environment runs in their cloud, so I cannot inspect the container it uses. There is an MCP client, documented under extend/mcp, the one place I can add a tool of mine.

That is the entire surface: a socket for tools, on a machine I cannot see, billed in a unit I cannot buy with a key. It works until it does not, and when it does not I wait.

reliability
2
usefulness
5
cost
2
longevity
5
Agree with El Hacker?