Codex vs Claude Code: Which Coding Subscription Is Worth It?
Codex, Claude Code, and GLM plans compared by API-equivalent value at $20, $100, and $200 tiers to see which gives the most usage per dollar.
What’s the best value coding subscription right now: Codex, Claude Code, or GLM?
For most people, Codex currently offers the better deal, mainly because of how usable its allowance feels day to day and how much its desktop app adds (image generation, browser control, computer use). Claude Code still has a stronger terminal experience and gives access to Anthropic’s Opus/Sonnet models, but its Fable-model allowance is capped at half your weekly usage on Max plans. If budget is the main constraint, GLM’s $18 tier punches well above its price.
TL;DR
- Codex’s $200 Pro 20X plan was measured directly: about 43 minutes of work moved the weekly usage meter by 3%, working out to roughly $34 of API-equivalent activity for that slice, which was then projected (not confirmed) to a much larger monthly figure.
- Claude Code’s Pro plan ($20/month) showed about 13 cents of API-equivalent usage per 4% move on the five-hour meter, scaling to an estimated $3.35 per full session allowance in the sample tested.
- These dollar projections are illustrative, not measured monthly limits. Only the base tiers (Codex Pro 20X and Claude Pro) were actually tested; the higher tiers were scaled using each provider’s advertised usage multipliers, not independently verified.
- Caching matters a lot. The Codex sample ran at about 94% cached input and Claude’s at about 79%, and a hypothetical 98%-reuse scenario would let the same allowance cover roughly 25% more tokens on Codex versus about 9.3% more on Claude, mostly because Claude’s usage skewed toward output tokens, which caching doesn’t discount.
- GLM’s coding plans (roughly $18, $80, and $168 a month, discounts sometimes available) weren’t run through the same dollar math, but the $18 tier’s usage limits make it worth considering before jumping to a $100 or $200 plan from OpenAI or Anthropic.
- Both Codex and Claude Code offer the same “5x for 5x price, 20x for 10x price” multiplier structure on their $100 and $200 tiers, meaning the top tier advertises twice the usage-per-dollar of the base plan, at least on paper.
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How do Codex’s pricing tiers work?
Codex has a limited free allowance, unlikely to sustain any real coding workflow. Paid tiers run through ChatGPT: Plus at $20/month, Pro 5X at $100, and Pro 20X at $200. The naming reflects advertised usage multipliers relative to Plus, not a literal dollar-for-dollar scaling.
The flagship coding model, referred to in testing as Astra, is rolling out to Plus as well, so reaching a capable model no longer strictly requires the $100 tier. Codex plans also open up other model options depending on rollout, and an “ultra mode” that can delegate parts of a task to additional agents in some plans.
In direct testing on the $200 tier, roughly 43 minutes of research and development work moved the weekly usage meter from 0% to 3%. Auditing that activity against API pricing put it at about $34 of equivalent usage. Dividing that across the full weekly allowance and extending to 30 days produced a projected figure near $4,900 for the $200 tier, with proportionally smaller figures for the $100 and $20 tiers based on advertised ratios. That $4,900 number is a projection built on a single small sample, not a confirmed monthly ceiling, and a follow-up attempt to validate the meter’s responsiveness with another batch of requests produced inconsistent, hard-to-interpret readings.
OpenAI has also been offering some users banked resets, which are one-time saved refills usable before they expire. A full reset restores both the 5-hour and weekly Codex limits and shifts the weekly reset date. These are promotional and not guaranteed, and the testing described here didn’t rely on them.
How does Claude Code’s pricing compare?
Claude Code runs on three tiers: Pro at $20/month, Max 5X at $100, and Max 20X at $200. Claude’s free chat tier does not include any Claude Code allowance. Pro includes usage of Opus and Sonnet, while the Fable model requires additional paid credits on that tier. Max plans include Fable access, but only up to half of the weekly allowance can go toward Fable models, meaning that pool depletes faster and using Fable beyond that cap costs extra.
Testing on the Pro tier, covering code review, data analysis, and system design tasks, found about 13 cents of API-equivalent activity per 4-percentage-point move on the five-hour meter. Scaled to a full five-hour session allowance, that comes out to roughly $3.35 in API-equivalent value. Assuming one full five-hour allowance used every day for 30 days produces rough monthly projections of about $101 for Pro, $503 for Max 5X, and just over $2,000 for Max 20X. These numbers depend on an assumed daily schedule, since the weekly usage display didn’t visibly change during testing, so there’s no confirmed weekly ceiling behind them.
Is the dollar-value comparison between Codex and Claude fair?
Not entirely, and that’s worth being explicit about. Codex’s projection is built from a weekly allowance figure; Claude’s is built from an assumed daily schedule extended across a month, because the weekly meter never moved during testing. The two providers also count usage differently and the models themselves aren’t interchangeable in output quality. So while the raw projected dollar figures make Codex’s higher tiers look dramatically larger in equivalent value, that gap says more about differing allowance structures and untested assumptions than about one company delivering some fixed multiple more value than the other.
Caching adds another wrinkle. About 94% of the Codex sample’s input came from cache, versus about 79% for the Claude sample. Modeling a hypothetical 98% cache-hit scenario showed the Codex allowance could stretch to cover about 25% more processed tokens, while Claude’s would stretch by roughly 9.3%. That’s because the Claude sample spent more of its API value on output tokens, which caching doesn’t discount, not because Claude’s caching implementation is worse.
For scale, in that caching scenario, the $200 Codex projection moved from about 2.8 billion to 3.6 billion processed tokens, and the $200 Claude projection moved from about 466 million to 510 million. These are token-volume estimates carrying every earlier assumption forward, not a measure of completed work or new code produced.
Where does GLM fit into this comparison?
GLM’s coding plans list at roughly $18, $80, and $168 a month at standard pricing, with discounted offers sometimes available, so it’s worth checking the billing period before comparing across providers. The associated coding tool (Z code / GLM’s coding client) is free to download, and new users get a trial quota to test it before subscribing.
No API-equivalent dollar figure was calculated for GLM in this comparison, so it can’t be placed precisely on the same scale as Codex or Claude Code. But based on practical testing, the $18 tier offers enough usage room, browser automation for checking work against a live interface, and the ability to keep working toward a longer task goal, that it holds up well against far pricier plans. For anyone whose main frustration is running out of allowance rather than needing a specific frontier model, GLM is worth trying before paying $100 or $200 elsewhere.
Which plan should you actually buy?
Start with the smallest plan that covers your workload, then upgrade once you’re actually exhausting it. The larger tiers look compelling in a spreadsheet of projected API-equivalent dollars, but paying for headroom you never use doesn’t get anything built. If a particular model consistently wins on your hardest tasks, and you’re comfortable working from a terminal, Claude Code’s Max tier can be the right call despite its smaller advertised value. If you want a capable model plus a more complete desktop experience, including image generation and in-app browser control bundled into the same task, Codex currently has the edge. And if your budget is the binding constraint, GLM’s cheapest tier deserves a real look before spending $100 or more anywhere else.
Frequently Asked Questions
Is Codex or Claude Code better for coding in 2026?
It depends on workflow. Codex was found to have a more generous practical allowance and a stronger desktop app with built-in image generation and browser/computer use. Claude Code’s terminal (CLI) experience was preferred by comparison, and its Fable model performed better on front-end and debugging tasks, but that model’s usage is capped at half the weekly Max allowance.
How much does Claude Code’s Max plan cost?
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Claude Code runs $20/month for Pro, $100/month for Max 5X, and $200/month for Max 20X. Pro includes Opus and Sonnet usage; Fable access requires the Max tiers, with only half of the weekly allowance usable on Fable models.
What is API-equivalent value in this context?
It refers to what a subscription’s measured token activity (input, cached input, and output) would cost if purchased directly through the provider’s API, based on published API rates. It does not mean the subscription funds an API account or that API-generated results would match the assistant’s output exactly.
Is GLM a good cheaper alternative to Codex or Claude Code?
Based on its usage limits and feature set (browser automation, sustained task-following, an $18 entry tier), GLM is a reasonable option for anyone on a tight budget, though no direct API-equivalent dollar comparison against Codex or Claude Code was calculated.
Are the projected dollar values for the $200 plans reliable?
No, they should be treated as illustrative projections from small, single-session samples, not confirmed monthly limits. Only the base tiers were tested directly; higher tiers were scaled using each provider’s advertised usage multipliers.
