🔍 Read the full analysis: Why AI Subscription Pricing Can Look Like A 5X Subsidy on ThorstenMeyerAI.com
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TL;DR
SemiAnalysis measured the usage limits of major AI subscriptions and priced the included tokens at each provider’s API rates. Its comparison found that Claude’s mid-tier plans offered roughly five to six times the API-equivalent value of comparable ChatGPT plans on a coding-agent workload. The report also estimates that subscriptions can consume far more inference compute than their share of revenue suggests, while providers’ price and limit changes can reduce subscriber value.
SemiAnalysis has compared AI subscription limits with the cost of buying the same measured usage at API list prices, reporting that Claude’s mid-tier plans provide roughly five to six times the API-equivalent value of comparable ChatGPT plans on a coding-agent workload. The result gives subscribers a way to compare allowances, while raising questions about the cost of serving heavy users and how long providers will maintain current limits.
For its main comparison, SemiAnalysis tested token usage across subscription services and tracked how each provider’s usage meter moved per million tokens. It then priced that usage at the providers’ first-party API list rates. On the tested workload, which was dominated by cached input, a $20 Claude Pro plan was valued at about $1,178 in API usage, compared with $211 for ChatGPT Plus. At $100, the report put Claude Max 5x at $5,725 and ChatGPT Pro 100 at $1,055. At $200, it estimated $11,726 for Claude Max 20x and $2,084 for ChatGPT Pro 200.
Those figures represent the API price of the plan’s full measured usage allowance, not cash paid to subscribers or a guaranteed amount every customer will use. SemiAnalysis says the difference remains large when measured in raw tokens, which addresses the objection that Opus 5.5’s higher API prices make its dollar value look larger than GPT-6.1 Sol’s. At the frontier tier, the report describes limits for GPT-6 Astra and Claude Fable 5.1 as broadly similar. Fable can use only half of a Claude plan’s limit, leaving the rest available for Opus or Sonnet.
The figures also reflect recent changes. SemiAnalysis says OpenAI roughly halved token allowances on its $200 plan; new subscribers receive the lower limits, while existing subscribers keep their previous limits until October 29. OpenAI also introduced a $500 plan, which the report says provides about 21% more Astra than the former $200 plan but less Sol-class API value. Its distinguishing feature is a stated 300 tokens-per-second Ultrafast mode, which SemiAnalysis says it is still testing.
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 Limits Meet Inference Costs
The comparison matters because a plan’s advertised price does not show what its allowance costs to serve. SemiAnalysis estimates subscriptions account for about 10% of Anthropic revenue while consuming more than 40% of its inference compute. On those rough estimates, subscriptions lower blended revenue per megawatt by about $36 million. The report says subscriptions are a larger share of OpenAI revenue, though the supplied figures do not quantify the same comparison for OpenAI.
Costs vary sharply with model choice and use. Assuming a subscriber exhausts the full allowance and API gross margins are 92%, the report estimates a gross margin near −369% for maxed-out Opus 5.5 use, compared with about 1% for maxed-out Fable 5.1 use. At 20% average utilization, its estimates rise to about 6% and 80%, respectively. These are modeled scenarios, not audited results or a description of every subscriber. They illustrate why a generous allowance may work as a customer-acquisition tool while still creating high costs for people who use premium models heavily.
For customers, the practical value depends on more than the headline ratio. Model quality, the mix of fresh and cached input, usage caps, and whether a subscriber can use the full allowance all affect the comparison. OpenAI’s Pro plans have no five-hour usage window, according to the report, which may benefit people who use a large share of their monthly allocation in bursts. SemiAnalysis says this narrows the practical difference for some users but does not erase the estimated API-value gap.
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Price Cuts Can Shrink Plan Value
API prices and subscription limits have changed across both providers. SemiAnalysis says Fable 5.1 cut cache-read prices by 75% compared with Fable 5, while Opus 5.5 cut input and output prices by 20% and cache reads by 60% compared with Opus 5. It reports no corresponding increase in Fable 5.1 token limits. Opus allowances rose by about 20% on Max and 50% on Pro, but the report says those increases did not fully offset the model’s lower API prices.
The report describes a similar effect for OpenAI’s GPT-6.1 Sol: its API price fell without a change to the limits, reducing the $200 plan’s API-equivalent value by about 30%. A lower API price can thus make the same subscription allowance worth less at list rates. SemiAnalysis says OpenAI’s recent reductions also flattened the per-dollar value of its Pro 100, Pro 200 and Pro 500 tiers, and the company removed “5x more usage” and “20x more usage” multipliers from its pricing page.
These comparisons depend on the measurement method. SemiAnalysis tested particular models and token types, then applied API list prices to the measured allowances. The main coding-agent workload consisted of about 96.6% cached input, 2.6% cache writes, 0.4% fresh input and 0.3% output. Other workloads with different token mixes or model choices may produce different API-equivalent totals.
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How Long Limits Will Hold
The report’s estimates do not establish how much each provider spends on every subscriber, or how typical the modeled utilization levels are. The supplied material does not provide a subscriber-by-subscriber usage distribution, audited subscription margins, or a complete cost breakdown by model. Its margin calculations rely on stated assumptions, including API gross margins of 92%, and should be read as estimates.
It is also unclear whether providers will keep current allowances as model prices fall, or how often limits may change. SemiAnalysis says OpenAI’s Ultrafast mode remains under testing, so the final experience and value of the new $500 tier are not settled in this account. The article’s figures cover specified models and a coding-agent token mix; they do not show how the comparison changes for every customer’s tasks or model preferences.
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Watch Limits and Ultrafast Testing
The immediate date for affected OpenAI customers is October 29, when the report says existing $200 subscribers’ older limits are set to expire. New purchases already receive the lower allowances. Subscribers considering a plan can compare the current limits for the models they use, check any time-based restrictions, and revisit the calculation when providers change prices or allowances.
SemiAnalysis says it is still testing OpenAI’s 300 tokens-per-second Ultrafast mode. Further details about that feature could clarify whether the $500 tier’s speed offering changes its practical value. Future allowance changes, model pricing and usage data will also determine whether the current gap persists; the supplied material does not establish when providers will make their next changes.
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Key Questions
What does the reported five-to-sixfold difference measure?
It compares the API list-price value of measured monthly subscription allowances for Claude and ChatGPT on SemiAnalysis’s coding-agent workload. It is not a claim that every subscriber gets that much practical benefit.
Why can a plan’s API-equivalent value fall after an API price cut?
If token limits stay the same while the API price per token falls, pricing those included tokens at the new rate produces a lower dollar total. SemiAnalysis says limits did not rise for Fable 5.1 or GPT-6.1 Sol when their API prices fell.
When do existing $200 ChatGPT Pro subscribers get the reduced limits?
SemiAnalysis says existing subscribers keep their previous limits until October 29. New purchases receive the lower limits immediately, according to the report.
Are the reported subscription margins actual company results?
No. They are SemiAnalysis estimates based on assumptions about full or partial plan use and API gross margins. The supplied material does not describe them as audited financial results.
Source: ThorstenMeyerAI.com
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