🔍 Read the full analysis: What’s Behind The 5X In AI Subscriptions? on ThorstenMeyerAI.com
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TL;DR
SemiAnalysis measured how much usage major AI subscriptions provide and compared it with the same usage at API list prices. In its agentic-workload comparison, Claude plans provide about five to six times the API-equivalent value of similarly priced ChatGPT plans, but usage limits, model mix and changing prices affect what subscribers actually get.
SemiAnalysis estimates that Claude subscriptions provide roughly five to six times the API-equivalent value of similarly priced ChatGPT plans on a selected agentic workload. The comparison matters as OpenAI and Anthropic change model prices and usage limits, which can alter subscription value even when the monthly fee stays the same.
The report compares how much each subscription’s usage allowance would cost at the provider’s API list prices. For a workload dominated by cached input, SemiAnalysis puts a $20 Claude Pro plan at $1,178 in API-equivalent usage, compared with $211 for ChatGPT Plus. At $100, it estimates $5,725 for Claude Max 5x and $1,055 for ChatGPT Pro 100; at $200, $11,726 for Claude Max 20x and $2,084 for ChatGPT Pro 200.
Those figures describe the value of the full monthly allowance under the report’s assumptions; they are not cash payouts or a guarantee that every subscriber can use the full amount. SemiAnalysis says each provider’s plans return a broadly consistent amount per subscription dollar within the tiers it tested: about 10.5 times the fee for OpenAI and about 58 times for Anthropic. It also says the gap remains large when measured in raw tokens, despite Opus costing more per token than GPT-6.1 Sol.
OpenAI recently cut usage allowances on its $200 plan, according to SemiAnalysis’s tracking, and introduced a $500 tier. Existing subscribers retain their previous limits until 29 October; new purchases receive the lower limits immediately. The report says the new tier provides about 21% more Astra usage than the former $200 plan, while its principal advertised distinction is a 300-token-per-second “Ultrafast” mode that SemiAnalysis was 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 Value Meets Compute Costs
The value gap has business consequences because subscribers can use far more inference compute than their fees would cover at API prices. SemiAnalysis estimates subscriptions account for about 10% of Anthropic’s revenue while consuming more than 40% of its inference compute. It estimates that this lowers the company’s blended revenue per megawatt by roughly $36 million. The report says subscriptions make up a larger share of OpenAI’s revenue, though it does not give a comparable figure here.
Those estimates help explain why generous allowances may change as models and prices change. Under SemiAnalysis’s assumptions, a subscriber who uses the full Opus 5.5 allowance would produce an estimated gross margin of about negative 369% for Anthropic on that plan; at 20% average use, its estimate rises to about 6%. The results depend on the report’s model costs, API prices and utilization assumptions, and should not be read as companies’ audited subscription margins.
For customers, a plan’s headline allowance is only one part of its practical value. Model access, usage windows, the mix of cached and fresh input, and whether a subscriber hits a cap all affect how much work a monthly fee covers. A subscription that looks generous at API list prices may be expensive for the provider to serve when heavily used.
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Recent Price Cuts Changed the Math
The report compares multiple models and providers, including Claude, ChatGPT, Meta, SpaceXAI, Cursor, Cognition, Z.ai, MiniMax and Moonshot. Its headline comparison uses an agentic workload that is mostly cached input: SemiAnalysis gives the mix as roughly 96.6% cached input, 2.6% cache writes, 0.4% fresh input and 0.3% output. Because API prices differ by token type, that workload mix affects the dollar-equivalent result.
Model price cuts have also changed the comparison. SemiAnalysis says GPT-6.1 Sol’s cached-input price fell without a corresponding usage-limit increase, reducing the $200 plan’s API-equivalent value by about 30%. It says Anthropic cut cache-read prices for Fable 5.1 by 75% compared with Fable 5, without raising Fable’s limits. Opus 5.5’s input and output prices fell 20% and cache reads 60% compared with Opus 5; the report says allowances rose about 20% on Max and 50% on Pro, so the allowance increases did not fully offset the price cuts.
At the frontier tier, the comparison is closer. SemiAnalysis says a $200 plan’s Astra allowance would represent about $2,897 at API prices, while the Fable 5.1 allowance uses about half of a Claude plan’s limit and represents $2,485. The remaining Claude allowance can be used on Opus or Sonnet, so comparing one model alone does not capture the whole subscription.
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Limits of the Value Comparison
The API-equivalent totals depend on the workload mix, model prices and assumption that a subscriber uses the full monthly allowance. The report’s agentic workload is heavily weighted toward cached input, so a user with a different balance of fresh input, cache writes and output could get a different comparison. Actual usage also varies: SemiAnalysis’s own estimates show markedly different margins at full utilization and at 20% average use.
Some practical details remain unsettled. The report says it was still testing OpenAI’s Ultrafast mode, and the supplied findings do not establish how often subscribers reach plan limits or how provider usage rules may change later. The comparison also does not establish that every Claude plan or workload delivers a fivefold advantage over ChatGPT; the ratio applies to the specified tiers and workload.
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Plan Terms Will Shape Future Value
For existing ChatGPT Pro subscribers on the $200 plan, the stated transition date for the reduced allowance is 29 October; new purchases already receive the lower limits, according to SemiAnalysis. The report is continuing to test the $500 tier’s Ultrafast mode. Further changes to model prices or subscription allowances could shift the API-equivalent calculations, so the comparison will depend on the terms in effect when customers use their plans.
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Key Questions
What does “five to six times the API-equivalent value” mean?
SemiAnalysis priced the full subscription allowance at the provider’s API list rates for a selected agentic workload. It estimates about $1,178 of API-priced usage for Claude Pro at $20, compared with $211 for ChatGPT Plus at the same monthly fee.
Does that mean Claude subscribers receive five times as much usable capacity?
Not necessarily. The ratio reflects the tested workload and API prices, including a high share of cached input. Model access, usage caps and individual usage patterns affect practical value.
What changed in OpenAI’s $200 plan?
SemiAnalysis says OpenAI roughly halved the token allowances per model tier. Existing subscribers keep their former limits until 29 October, while new purchases receive the lower limits immediately.
Why can an AI subscription cost providers more than it earns?
Heavy users can consume substantial inference compute. SemiAnalysis estimates that Anthropic subscriptions account for about 10% of its revenue but more than 40% of its inference compute; those are the report’s estimates, not audited company figures.
Source: ThorstenMeyerAI.com
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