🔍 Read the full analysis: The 5X Pricing Puzzle Inside AI Subscriptions on ThorstenMeyerAI.com
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TL;DR
SemiAnalysis measured usage limits across major AI subscriptions and estimated that Claude plans offer about 5.4–5.6 times the API-equivalent value of comparable ChatGPT plans on the tested mid-tier models. The report also finds that recent price cuts and allowance changes have reduced subscription value, while heavy use of premium models can make the plans costly for providers to serve.
SemiAnalysis has compared usage limits across major AI subscriptions, estimating that Claude plans deliver about 5.4 to 5.6 times the API-equivalent value of comparable ChatGPT plans on the tested mid-tier models. The report comes after OpenAI cut allowances on its $200 plan and added a $500 tier, changes that make subscription value and the cost of serving heavy users a current question for both companies.
The comparison estimates the API list-price value of each plan’s full monthly usage limit for an agentic coding workload. That workload is mostly cached input, with the report specifying roughly 96.6% cached input, 2.6% cache writes, 0.4% fresh input and 0.3% output. At $20 a month, SemiAnalysis estimates ChatGPT Plus at about $211 in API-equivalent usage and Claude Pro at about $1,178. At the $200 tier, it estimates $2,084 for ChatGPT Pro and $11,726 for Claude Max 20x.
These figures are the report’s estimates, not cash rebates or guarantees that every subscriber can consume the full allowance. The comparison also depends on model and usage mix. SemiAnalysis says the gap remains substantial when comparing raw tokens, even though the tested GPT-6.1 Sol model costs less per token than Claude Opus 5.5 at API list prices. At the frontier tier, the report finds the plans more closely matched: a $200 OpenAI plan’s Astra allowance corresponds to about $2,897 at list prices, while Fable 5.1 usage can consume about half of a Claude plan’s limit at an estimated $2,485.
SemiAnalysis says OpenAI’s recent change roughly halved allowances by model tier on the $200 plan. Existing subscribers keep their earlier limits until October 29; new purchases receive the lower limits. The report estimates that a new $500 tier offers about 21% more Astra usage than the former $200 plan, and less Sol-class API-equivalent value, while promoting an Ultrafast mode rated at 300 tokens per second. SemiAnalysis says it is still testing that mode. OpenAI also removed “5x more usage” and “20x more usage” multipliers from its pricing page, according to the report.
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 Meets Compute Cost
The headline gap matters to subscribers weighing plans, but the report’s cost estimates show why the terms may keep changing. SemiAnalysis estimates that subscriptions account for about 10% of Anthropic revenue while using more than 40% of its inference compute. It estimates that this mix lowers blended revenue per megawatt by roughly $36 million. The report says subscriptions make up a larger share of OpenAI revenue, though it does not provide a corresponding figure here.
Using its assumptions, the report estimates that a subscriber who fully uses an Opus 5.5 allowance could produce a gross margin of about negative 369% for Anthropic; fully using a Fable 5.1 allowance would yield about 1%. At 20% average utilization, its estimates rise to about 6% for Opus and 80% for Fable. These are modeled outcomes, not reported company results, and depend on assumptions including a 92% API gross margin. They suggest that model choice and how much subscribers use their plans can shape the economics more than the subscription price alone.
For customers, the practical value depends on which models they use, their workload and any time-based usage restrictions. The report says OpenAI Pro plans have no five-hour usage window, which may help users who need to use more of their monthly allowance in bursts. That feature narrows some practical differences, but does not erase the report’s estimated value gap for the specified mid-tier comparison.
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Price Cuts Can Reduce Plan Value
API-equivalent value is an estimate that prices the usage allowance at each provider’s first-party API rates. It changes when either the allowance or the model’s API price changes. A lower API price can reduce the calculated dollar value of a subscription even if the number of tokens included stays the same. That makes the metric useful for comparing estimated usage, but it does not by itself show a plan’s real-world value to a customer.
SemiAnalysis reports that Anthropic cut Fable 5.1 cache-read prices by 75% compared with Fable 5, and Opus 5.5 input and output prices by 20% and cache-read prices by 60% compared with Opus 5. It says Fable 5.1 launched without higher token limits, while Opus allowances rose about 20% on Max and 50% on Pro. The report says those increases did not fully offset the price cuts. It also estimates that OpenAI’s Sol-class API-equivalent value fell about 30% on the $200 plan after GPT-6.1 Sol’s cached-input price fell without a corresponding limit increase.
Before OpenAI’s changes, SemiAnalysis says the higher Pro tiers offered progressively more Astra value per dollar. It now estimates that Pro 100, 200 and 500 return the same tokens per dollar. Its comparison covers Claude, ChatGPT, Meta, SpaceXAI, Cursor, Cognition, Z.ai, MiniMax and Moonshot, but the fivefold headline specifically refers to the selected Claude Opus 5.5 and GPT-6.1 Sol comparison.
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Limits Beyond the Published Estimates
The figures depend on SemiAnalysis’s measured allowances, the selected models, API list prices and a particular coding-agent usage mix. The supplied material does not explain how all results vary across different tasks, model combinations or subscribers’ actual usage. A plan’s calculated API-equivalent value should not be read as the amount every customer will receive or as a direct measure of customer savings.
The report’s margin estimates are also modeled from stated assumptions, including full usage or 20% average utilization and a 92% API gross margin. The material does not provide audited subscription-level costs or detailed company data to independently verify those estimates. SemiAnalysis says it is still testing OpenAI’s 300-token-per-second Ultrafast mode, so its performance and practical value remain unsettled.
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Tracking Limits and Ultrafast Testing
The next dated change in the supplied material is October 29, when the previous limits for existing $200 OpenAI subscribers are due to end. New buyers already receive the reduced allowances, according to SemiAnalysis. Further comparisons will depend on whether providers change token limits alongside API prices and how OpenAI’s Ultrafast mode performs in testing. The report gives no confirmed schedule for additional plan changes.
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Key Questions
What does the reported 5.4–5.6× gap measure?
It compares the estimated API list-price value of the full monthly allowances for selected mid-tier Claude and ChatGPT plans on a specified coding-agent workload. It does not mean Claude subscribers receive a cash benefit or that all workloads have the same ratio.
Which plans did the report compare?
At $20 a month, it compared Claude Pro with ChatGPT Plus. At $100 and $200, it compared Claude Max tiers with ChatGPT Pro tiers, using Claude Opus 5.5 and GPT-6.1 Sol for its central mid-tier comparison.
What changed for existing $200 ChatGPT subscribers?
SemiAnalysis says existing subscribers retain their earlier usage limits until October 29. New purchases receive the reduced allowances immediately.
Does a lower API price increase a subscription’s estimated value?
Not necessarily. If the token allowance stays fixed, a lower API list price reduces the dollar value assigned to that usage. The report says some allowance increases on Anthropic’s Opus plans did not fully offset recent price cuts.
Are the subscription margin figures confirmed company results?
No. They are SemiAnalysis estimates based on stated assumptions about usage and API gross margins. The supplied material does not provide audited subscription-level costs.
Source: ThorstenMeyerAI.com
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