🔍 Read the full analysis: AI Subscriptions: Looking Beyond The 5X Price Label on ThorstenMeyerAI.com
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TL;DR
SemiAnalysis estimates that, on a coding-agent workload, Claude subscriptions provide roughly five to six times the API-equivalent value of comparable ChatGPT plans on mid-tier models. The report also tracks recent limit and API-price changes at OpenAI and Anthropic, and argues that heavy use of premium models can make subscription economics difficult to sustain. Its estimates depend on usage patterns, plan limits and API list prices.
SemiAnalysis has compared the usage limits of major AI subscriptions by model and token type, estimating what the same usage would cost at API list prices. In its coding-agent workload comparison, Claude plans return roughly five to six times the API-equivalent value of comparable ChatGPT plans on mid-tier models, a finding shaped by the providers’ limits, model prices and recent plan changes.
The report compares GPT-6.1 Sol with Claude Opus 5.5 on a workload dominated by cached input. SemiAnalysis says about 96.6% of the tokens in that workload are cached input, with roughly 0.4% fresh input, 2.6% cache writes and 0.3% output. It calculates “API value” by pricing a plan’s full monthly usage limit at the providers’ first-party API list rates.
At the $20 tier, SemiAnalysis estimates $211 in API-equivalent usage for ChatGPT Plus and $1,178 for Claude Pro, or about 5.6 times as much for Claude. At $100, it estimates $1,055 for ChatGPT Pro 100 and $5,725 for Claude Max 5x, a ratio of about 5.4. At $200, the estimates are $2,084 for ChatGPT Pro 200 and $11,726 for Claude Max 20x, about 5.6 times as much. These are estimates at list prices, not cash savings or guarantees that every subscriber can use the full allowance.
The comparison is narrower at the frontier tier. The report says a $200 OpenAI plan allowance would be exhausted after about $2,897 of GPT-6 Astra use at API prices. A Claude plan would be half-used after about $2,485 of Claude Fable 5.1 use, because Fable can consume only half its limit; the remaining usage is available for other models, including Opus and Sonnet. SemiAnalysis says the mid-tier gap also remains large when comparing token counts, although Opus’s higher API price contributes to its higher dollar-equivalent estimate.
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.
Subscription Value Depends on Model Use
The estimates matter because a plan’s advertised monthly price does not show how much usage each model permits, or how that allowance changes when API list prices change. Model-specific limits and the subscriber’s workload determine the practical value. A customer who relies heavily on a model with a restricted allowance may see less benefit than the headline comparison suggests.
SemiAnalysis also links subscription limits to the providers’ inference costs. It estimates subscriptions make up about 10% of Anthropic revenue while consuming more than 40% of its inference compute. The report says this lowers blended revenue per megawatt by roughly $36 million. These are the report’s estimates; it does not provide a company filing confirming those figures in the supplied material.
Using its assumptions, including 92% API gross margins, SemiAnalysis estimates that a subscriber maxing out Opus 5.5 could imply a gross margin of roughly negative 369% for the plan. At full Fable 5.1 use, its estimate is about 1%. At 20% average utilization, those estimates change to about 6% for Opus and 80% for Fable. The gap illustrates why average utilization and model mix matter to subscription economics, while also making clear that the calculations depend on assumed usage and costs.
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Recent Plan and API Price Changes
The report’s comparison reflects an OpenAI plan change made the previous week. SemiAnalysis says OpenAI roughly halved the token allowances across model tiers on its $200 plan. For Sol-class models, it estimates API-equivalent value fell by more than half because OpenAI also reduced GPT-6.1 Sol’s cached-input API price. Existing $200 subscribers keep their earlier limits until October 29, while new purchases receive the lower limits immediately, according to the report.
OpenAI also introduced a $500 tier. SemiAnalysis estimates it provides about 21% more Astra usage than the old $200 plan, and less Sol-class API value, with a 300-token-per-second “Ultrafast” mode as a key advertised feature. The report says it is still testing that mode. It also finds that the Pro 100, 200 and 500 tiers now provide the same tokens per dollar, and says OpenAI removed “5x more usage” and “20x more usage” comparisons from its pricing page. One practical distinction remains in the report: OpenAI Pro plans do not have a five-hour usage window, which may help users with concentrated bursts of work.
Anthropic’s API price changes also affect the comparison. SemiAnalysis says Fable 5.1 cut cache-read prices by 75% from Fable 5, while Opus 5.5 cut input and output prices by 20% and cache reads by 60% from Opus 5. It reports that Fable 5.1 launched without higher token limits; Opus allowances rose by about 20% on Max and 50% on Pro. The report says those increases did not fully offset the API price cuts. It also says OpenAI did not raise Sol limits when GPT-6.1 shipped, contributing to a roughly 30% drop in API-equivalent value on the $200 plan.
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Usage and Cost Estimates Remain Conditional
The comparison is tied to one agentic workload, with a particularly high share of cached input. The supplied material does not establish that the same ratio applies to other tasks, such as ordinary chat, research or workloads with more fresh input and output. Nor does it show how many subscribers reach their plan limits in practice.
The estimates also rely on API list prices and on the assumption that the plan’s full monthly allowance is consumed. The provided source material does not include the complete report methodology, independent verification of the utilization assumptions, or company disclosures confirming the revenue and compute figures. SemiAnalysis says it is still testing the new Ultrafast mode; its performance and value are not established here. Actual subscriber access may also depend on changing limits and plan terms.
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Watch Limits and Ultrafast Testing
The next dated change identified in the report is October 29, when existing subscribers to OpenAI’s $200 plan are due to move from their grandfathered limits to the new allowance, according to SemiAnalysis. The report does not state whether OpenAI will make further changes before then.
SemiAnalysis says its assessment of the 300-token-per-second Ultrafast mode is still in progress. Further testing could clarify whether that feature changes the practical appeal of OpenAI’s $500 plan. Subscribers and prospective buyers can also watch for updates to plan limits, model access and API list prices: those changes can shift an API-equivalent comparison even when the monthly subscription fee stays the same.
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Key Questions
What does the reported five-to-six-times gap measure?
It compares the estimated API list-price value of each plan’s full monthly usage limit for GPT-6.1 Sol and Claude Opus 5.5 on SemiAnalysis’s coding-agent workload. It is not a claim that every subscriber saves that amount.
Which subscriptions did SemiAnalysis compare?
The supplied report details ChatGPT Plus and Pro plans alongside Claude Pro and Max tiers. It also says the wider study tested subscriptions from several other providers, including Meta, SpaceXAI, Cursor, Cognition, Z.ai, MiniMax and Moonshot.
Why can an API price cut reduce a subscription’s estimated value?
The report prices subscription allowances at current API list rates. If the API price for a token falls and the plan allowance does not rise enough to compensate, the same included usage has a lower API-equivalent dollar value.
Do the estimates show what an average subscriber will use?
No. The figures price the plan’s full stated monthly allowance. The report also models a 20% utilization scenario, but the supplied material does not establish actual average usage across subscribers.
Source: ThorstenMeyerAI.com
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