🤖 AI Summary
GitHubのCopilotサービスに対する新しい使用量ベースの課金体系が導入され、ユーザーからは大きな反響が寄せられています。4月に発表されたこの新システムでは、以前のリクエスト単位から使用量単位への変更が実施されました。
具体的には、プロ Plan は1ヶ月あたり$15相当（1,500 credits）、プロ+ Plan は$70相当（7,000 credits）、コピilot Max Plan は$200相当（20,000 credits）を提供します。各リクエストの使用量によって必要となるcreditsが異なるため、価格は単純なリクエストから複雑なリクエストまで大きく変わります。
結果として、多くのユーザーは以前の月間使用量が新規制で短時間に使い切られる「ショック」を経験しています。一部のユーザーはわずか1日で全月額分のcreditsを使い果たしたと報告しています。
GitHub Copilotの選択モデルにより、同じリクエストでも異なるコストとなるため注意が必要です。例えば、OpenAIのGPT-5.4 nanoから1,000,000文字の出力は$1.25に抑えられるが、最新のGPT-5.5は30ドルと大きな差が出ます。
この変更はユーザー間で議論を引き出し、新たな課金体系が開発された背景や詳細についての理解が深まるきっかけとなりました。
An anonymous reader quotes a report from Ars Technica: In April, GitHub announced that it was moving subscribers from request-based billing to a usage-based model for its AI-powered Copilot service. As that new pricing model goes into effect today, many GitHub Copilot users are reporting some extreme sticker shock as they realize just how quickly their previous "normal" usage is burning through their newly limited monthly allotment of AI credits. Across social media and forums, many Copilot users are sharing personal statistics showing how just a few hours of AI usage can now account for a large chunk of their new monthly subscription caps. For some users, it reportedly took less than a day to use up a month's usage quota.
That's a big change from previous months, when GitHub Copilot subscribers were allocated a certain number of "requests" and "premium requests" based on their payment tier. GitHub said that the old system meant that "a quick chat question and a multi-hour autonomous coding session [could] cost the user the same amount," forcing Copilot itself to "absorb much of the escalating inference cost behind that usage." [...] Indeed, some Copilot users have been sharing estimates from GitHub's own tool showing that their previous monthly usage would rack up bills in the thousands of dollars under the new pricing plan. Under GitHub's new usage-based pricing system, paid Copilot subscriptions instead grant users a certain number of AI "credits" each month, with one credit corresponding to $0.01 of usage. Subscribers also get bonus credits depending on their subscription level: the $10/month Pro plan includes 1,500 credits ($15 worth); the $39 Pro+ plan includes 7,000 credits ($70 worth); and the $100/month Copilot Max plan includes 20,000 credits ($200 worth).
The precise number of Copilot credits used by a given prompt is determined by the number of input and output tokens used and the rates charged by the underlying large language model. That means pricing is highly dependent not just on the type of request but on the specific model that a user chooses. One million output tokens from OpenAI's GPT-5.4 nano would run just $1.25 on GitHub Copilot, but that same level of output would run $30 on the frontier GPT-5.5 model (Copilot users who rely on "Auto" mode to pick the most appropriate available model for any request should be extremely careful, as some users report it can switch to expensive models for extremely simple queries).
Read more of this story at Slashdot.
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