Codex Forecast vs Claude Code Usage Monitor in 2026

Q: Is Codex Forecast free to use?

Codex Forecast is free, with no account and no paid tier . It is a website with a public API, and the API needs no key . No other price is published for Codex Forecast. Its free email alerts are sent when a reset actually happens if you opt in .

Q: Can Codex Forecast data be used without signing up?

Yes, the public API needs no key . It gives stats, paginated reset history, forecasts and operational health . The site and API share a snapshot cached for up to five minutes , so the figures can be up to five minutes old.

Codex Forecast and Claude Code Usage Monitor compared on what each does, what each costs and what to check before you pick which tracks your usage limits.

By SupaKeeper · 2026-10-28

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

Codex Forecast and Claude Code Usage Monitor compared on what each does, what each costs and what to check before you pick which tracks your usage limits.

Codex Forecast estimates when OpenAI will next reset Codex usage limits ^[1], and Claude Code Usage Monitor's default configuration is the Custom plan, which it describes as designed for 5-hour Claude Code sessions ^[2]. It needs Python 3.9 or later ^[2].

Each answers a different question. If the question is when a Codex usage limit resets, Codex Forecast is built for that ^[1]. If the question is monitoring use during a Claude Code session, Claude Code Usage Monitor is the tool whose page names that need ^[2].

Option	What its sources say it does	Cost	Account or install
Claude Code Usage Monitor	Monitors Claude Code usage with predictions and warnings ^[2]; supports reset-aware forecasting and pace calculations ^[2]; default Custom plan is designed for 5-hour Claude Code sessions ^[2]	not published	pip install claude-monitor ^[2]; needs Python 3.9 or later ^[2]
Codex Forecast	Its own description says it estimates when OpenAI resets Codex usage limits ^[1]; it combines several sources ^[1]; it can email you when a reset happens, if you opt in ^[1]	free, no paid tier ^[1]	no account ^[1]; a website with a public API ^[1]

The short answer

Codex Forecast estimates when OpenAI will next reset Codex usage limits ^[1], and it can email you when a reset happens if you opt in ^[1]. Claude Code Usage Monitor's default configuration is the Custom plan, which its own words describe as designed for 5-hour Claude Code sessions ^[2]. It needs Python 3.9 or later to run ^[2].

Each tool answers a different question. If the question is when a Codex usage limit resets, Codex Forecast is built for that ^[1]. If the question is monitoring use during a Claude Code session, Claude Code Usage Monitor is the tool whose page names that need ^[2].

What Claude Code Usage Monitor is built for

Claude Code Usage Monitor's own page says its default option is the Custom plan, designed for 5-hour Claude Code sessions ^[2]. A developer reading that page sees a tool aimed at sustained working sessions rather than short, occasional use ^[2]. To run it, a developer needs Python 3.9 or later, and its page states that requirement for anyone setting it up ^[2]. It can be installed as a command with pip, and the page gives the install command as pip install claude-monitor ^[2]. The page also notes it can be installed from PyPI using uv ^[2]. Its default Custom plan monitors token usage, message count and cost ^[2], and the plan is designed for 5-hour sessions ^[2]. These points are not the full list, so check the tool's own pages for anything else it does.

What Codex Forecast is built for

Codex Forecast is made by the team that publishes this site. The product describes its method as a statistical estimate of when OpenAI will next reset Codex usage limits ^[1]. For a developer, that answers the question of when a weekly usage reset is due, so the developer can schedule work around it. By its own description, the estimate combines an account it checks every 60 seconds, OpenAI staff announcements and the OpenAI status page ^[1]. When a measured refill and an announcement disagree, the product trusts the measured refill ^[1]. Each reset used in the forecast is listed with a link to where it was announced ^[1]. Its predictions that name a specific day are scored in public, misses included ^[1]. You can opt in to free emails that are sent when a reset actually happens ^[1]. The product describes itself as a website with a public API ^[1], an independent tracker with no affiliation to OpenAI ^[1].

Pricing and fees

The facts given here say nothing about what Claude Code Usage Monitor costs, so no cost is published here. The page does not describe a paid tier, a trial or a discount for either tool, so none is stated here. For Codex Forecast, the product claims it is free, with no account and no paid tier ^[1]. Codex Forecast's only published price is free, with no account and no paid tier ^[1]. Its email alerts are described as free when a reset happens ^[1]. If you need the cost of Claude Code Usage Monitor for your own use, check its own pages, since the facts here do not give one.

Setting it up and daily use

Codex Forecast is a website with a public API, so you open it in a browser or call its API for data ^[1]. The site and API share a snapshot that is cached for up to five minutes ^[1]. There is no account and no paid tier to set up ^[1], and the public API needs no key ^[1]. Claude Code Usage Monitor is set up by installing it, and its page gives pip install claude-monitor as one way ^[2]. It needs Python 3.9 or later for that install ^[2]. Its default configuration is the Custom plan, designed for 5-hour Claude Code sessions ^[2]. The facts here say nothing about day-to-day steps beyond installing and running it, so check each tool's own pages for anything further.

Things to check before you choose

Ask what you need the tool to tell you. Codex Forecast predicts when Codex usage limits reset ^[1], while Claude Code Usage Monitor's default plan is aimed at Claude Code sessions ^[2]. Ask which assistant you use, since the two track different products. Ask what the reset forecast relies on, since Codex Forecast combines its own check, staff announcements and the status page ^[1], and the facts say nothing about Claude Code Usage Monitor drawing on official announcements. Ask how fresh the data is; Codex Forecast caches a shared snapshot for up to five minutes ^[1], and you can check what the other tool's page says about freshness. Ask about the environment, since Claude Code Usage Monitor needs Python 3.9 or later ^[2]. Ask whether the tool will notify you, since Codex Forecast emails on a reset if you opt in ^[1].

How to choose

Choose by the assistant you use and the question you have. If you use Codex and want to know when its usage limits reset, Codex Forecast estimates that ^[1]. If you want to be told when a reset happens, Codex Forecast can email you when you opt in ^[1]. If you use Claude Code and want a monitor whose default plan is designed for 5-hour sessions, Claude Code Usage Monitor fits that ^[2]. If you need a public API that gives stats and reset history without a key, Codex Forecast offers one ^[1]. If your environment must meet a stated requirement, recall that Claude Code Usage Monitor needs Python 3.9 or later ^[2]. Pick by the assistant you run, not by the two tools interchangeably.

Frequently asked questions

Is Codex Forecast free to use?

Codex Forecast is free, with no account and no paid tier ^[1]. It is a website with a public API, and the API needs no key ^[1]. No other price is published for Codex Forecast. Its free email alerts are sent when a reset actually happens if you opt in ^[1].

Does Claude Code Usage Monitor cost anything?

The facts given here say nothing about what Claude Code Usage Monitor costs. The page describes how the tool works and how it is installed, but says nothing about a fee. Check its own pages if you need the cost.

Can Codex Forecast tell when Codex usage limits reset?

Yes. Codex Forecast estimates when OpenAI will next reset Codex usage limits ^[1]. By its own description, the estimate combines an account it checks every 60 seconds, OpenAI staff announcements and the OpenAI status page ^[1]. When a measured refill and an announcement disagree, it trusts the measured refill ^[1].

What does Claude Code Usage Monitor monitor?

The page describes it as a monitor of Claude Code usage with predictions and warnings ^[2]. Its default Custom plan is designed for 5-hour Claude Code sessions ^[2], and it supports reset-aware forecasting and pace calculations ^[2]. It needs Python 3.9 or later to run ^[2].

Can Codex Forecast data be used without signing up?

Yes, the public API needs no key ^[1]. It gives stats, paginated reset history, forecasts and operational health ^[1]. The site and API share a snapshot cached for up to five minutes ^[1], so the figures can be up to five minutes old.

It is free, with no account and no paid tier. ^[1]

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