🔍 Read the full analysis: Reading AI Subscription Prices Through The 5X Subsidy on ThorstenMeyerAI.com
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TL;DR
SemiAnalysis compared the token allowances of major AI subscriptions with the cost of buying equivalent usage at API list prices. Its analysis estimates that Claude’s mid-tier plans provide roughly 5.4 to 5.6 times the API-priced value of comparable ChatGPT plans, while recent model price cuts and limit changes have altered the value of both services.
SemiAnalysis has measured usage limits across major AI subscriptions and estimates that Claude plans deliver about five to six times the API-priced usage of comparable ChatGPT plans on the models it tested. The report also finds that recent price cuts and allowance changes have reduced the calculated value of some plans, making the headline ratio a snapshot rather than a fixed measure of what subscribers will receive.
The analysis compares how provider usage bars move when different token types are consumed, then prices the resulting allowances at each company’s first-party API list rates. For a coding-agent workload, it estimates that a $20 Claude Pro plan carries $1,178 in API-equivalent Opus 5.5 usage, against $211 for ChatGPT Plus using GPT-6.1 Sol. At the $100 level, its estimates are $5,725 for Claude Max 5x and $1,055 for ChatGPT Pro 100. At $200, they are $11,726 for Claude Max 20x and $2,084 for ChatGPT Pro 200.
Those figures produce a reported ratio of about 5.4 to 5.6 times in Claude’s favor for the tested mid-tier models and workload. SemiAnalysis says the gap remains large when usage is compared in tokens rather than dollars, since GPT-6.1 Sol has a lower price per token than Opus 5.5. The report estimates that each lab’s subscription tiers return roughly the same API-equivalent value per subscription dollar within that lab: about 10.5 times the fee for OpenAI plans and about 58 times for Anthropic plans.
The report describes OpenAI as having halved allowances on its $200 plan, with the lower limits applying immediately to new purchases. Existing subscribers keep their previous limits until October 29. OpenAI also introduced a $500 tier. According to SemiAnalysis, it offers about 21% more Astra usage than the former $200 plan, but less Sol-class API-equivalent value, partly because the API price of Sol fell. The report identifies 300 tokens per second in Ultrafast mode as the new tier’s main distinction and says that feature is still being tested.
The 5x is a subsidy, not a price
SemiAnalysis metered the meters — every major AI subscription, token type by token type, converted to API list value. On the mid-tier models both labs call the daily driver, a Claude plan returns ~5–6× the API value of the matching ChatGPT plan. Real — and the least durable number in the report.
…and the plan is fully exhausted. One pool for every model.
…and the plan is only half used — Fable is capped at 50% of the limit, leaving the rest for Opus/Sonnet. That’s where the mid-tier gap compounds.
- $200 plan halved — Sol-class value down >50% (6.1 Sol cache price cut compounds it)
- Old limits kept until 29 October; new buyers cut immediately
- New $500 tier: only +21% Astra vs the old $200 — real draw is 300 TPS Ultrafast
- Ladder flattened: Pro 100/200/500 now identical per dollar; multipliers removed from pricing page
- In OpenAI’s favour: no 5-hour window on Pro plans — easier to use the full allowance
- Flat per-dollar value across all tiers, before and after
- New premium models placed at lower relative limits (Fable capped at 50%)
- Opus allowances raised ~20% (Max) / ~50% (Pro) with the 5.5 price cut — not enough to fully offset it
- Repeatedly walked back planned cuts earlier this year under pressure from OpenAI’s generosity
- Twelve months ago, OpenAI was the generous option. Positions swap.
Gross margin per plan, assuming 92% API gross margins. The subsidy lives almost entirely in Opus and Sonnet usage — Anthropic would already be near software-like subscription margins if everyone used only Fable. Subscriptions matter even more for OpenAI, where they’re a larger share of revenue.
Three identical subscriptions; one had ~20% lower limits. The provider (unnamed) confirmed an “extremely tiny” A/B test on limit balancing. Two lessons: limits can change silently, per account, at any time — and you won’t know without instrumentation. The usage bar is a percentage, not a contract.
If you’re choosing a plan this month for agentic coding on a mid-tier model, the report settles it: a Claude plan returns ~5–6× the API value of the matching ChatGPT plan. But a plan returning 58× its fee on a model served at a steeply negative margin for heavy users is a marketing budget with a usage meter. Value moves silently, gets A/B tested per account, and twelve months ago ran the other way. Use the subsidy while it exists — it’s genuinely large. Don’t build a cost model on it. Price workloads at API rates, keep a router between you and any one vendor, and benchmark open weights on your own hardware for steady volume. A deal you can’t verify isn’t a price. It’s weather.
The Cost of Heavy AI Use
The estimates matter most to people who use a large share of their subscription allowance, especially for coding and other agentic work that can generate substantial cached input. SemiAnalysis estimates that subscriptions account for about 10% of Anthropic revenue while consuming more than 40% of its inference compute. It says the resulting mix lowers revenue per megawatt by roughly $36 million. The report describes subscriptions as a larger share of OpenAI’s revenue, though the provided figures do not quantify that share.
SemiAnalysis’s margin estimates show why the headline value may not last. Assuming a subscriber uses the full allowance and API gross margins are 92%, the report estimates gross margins of about minus 369% for Opus 5.5 and about 1% for Fable 5.1. At 20% average utilization, its estimates rise to about 6% and 80%, respectively. These are modeled results, not disclosed company accounts, and depend on assumptions about usage and costs. They suggest that generous limits can act as a costly way to attract and retain users, particularly when subscribers choose the most expensive models.
For subscribers, a lower API price does not automatically mean more included usage. If an allowance stays fixed while a model’s list price falls, the API-equivalent dollar value of that allowance falls too. Limits and model prices move separately, so a plan’s value can change without a change to its monthly fee.
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How Model Prices Shifted
The comparison covers Claude, ChatGPT, and offerings from Meta, SpaceXAI, Cursor, Cognition, Z.ai, MiniMax and Moonshot. Its central estimates use an agentic workload with roughly 96.6% cached input, 2.6% cache writes, 0.4% fresh input and 0.3% output. Those proportions matter: a workload with a different mix of cached input, fresh input and output could produce different results.
SemiAnalysis says Anthropic cut cache-read prices by 75% for Fable 5.1 compared with Fable 5, without increasing Fable’s token limits. It says Opus 5.5 prices for input and output fell 20%, and cache reads fell 60%, compared with Opus 5. The report estimates that Opus allowances rose about 20% on Max and 50% on Pro, but not enough to offset the price reductions. For OpenAI, it reports no increase in Sol limits when version 6.1 shipped and estimates a roughly 30% fall in API-equivalent value on the $200 plan.
For frontier models, the report describes a narrower comparison. It estimates that a $200 ChatGPT plan would be exhausted after about $2,897 of GPT-6 Astra usage. A Claude plan would be half-used after about $2,485 of Fable 5.1 usage; the other half remains available for Opus or Sonnet. OpenAI plans also lack the five-hour usage window that applies to Claude plans, a difference SemiAnalysis says can help users with bursty workloads.
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Limits Behind the Estimates
The figures are API-equivalent estimates, not cash refunds, guaranteed usage, or audited measurements of each company’s serving costs. The source material does not provide the full testing method, sample sizes, or uncertainty ranges for every subscription, so readers cannot assess how representative each measurement is from the supplied figures alone. Actual value also depends on model choice, workload mix, and how much of an allowance a subscriber uses.
SemiAnalysis says the ratio remains large when expressed in tokens, but the detailed token totals and comparison calculations are not included in the supplied material. The report’s profitability estimates also rely on assumptions, including a 92% API gross margin and specified utilization levels; company-level subscription costs and margins have not been provided here. OpenAI’s Ultrafast mode remains under testing, and the material does not explain how its performance or availability will compare with the stated speed.
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Upcoming Plan Changes to Watch
For current subscribers, the clearest near-term date in the report is October 29, when the old limits for existing $200 ChatGPT Pro customers are due to end. New buyers already receive the lower allowance described by SemiAnalysis. The report does not say whether OpenAI will make further changes after that date.
Further comparisons will depend on whether the companies adjust subscription limits as they change model prices, and on the results of testing for OpenAI’s Ultrafast mode. SemiAnalysis’s figures describe a particular workload and a particular point in those changes. Subscribers weighing plans can use them as a reference, while checking current limits and model prices before making a decision.
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Key Questions
What does API-equivalent value mean?
It is the estimated cost of buying the plan’s measured token allowance at the provider’s first-party API list prices. It does not mean subscribers receive that amount of cash or can convert unused allowance into API credit.
Does Claude always provide five times as much usage as ChatGPT?
No. The report estimates a 5.4 to 5.6 times difference for specified mid-tier models and an agentic workload. Different models, token mixes, usage limits or subscription changes can alter the comparison.
What changes did the report identify for ChatGPT Pro?
SemiAnalysis says OpenAI cut the allowance on its $200 plan, with the new limits applying to new purchases. Existing subscribers keep their former limits until October 29, according to the source material. OpenAI also added a $500 tier.
Why can an API price cut lower subscription value?
If the included token limit stays the same while the API price per token falls, the allowance costs less when priced at API rates. That reduces its API-equivalent dollar value unless the provider also raises the limit.
Source: ThorstenMeyerAI.com
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