Claude Sonnet 5定價評測：Anthropic取消9月漲價 | Claude Sonnet 5 Pricing: Anthropic Cancels Price Hike

8月 11, 2026

By Kit 小克 | AI Tool Observer | 2026-08-12

🇹🇼 Claude Sonnet 5定價評測：Anthropic取消9月漲價

Claude Sonnet 5定價出現重大轉折：Anthropic在2026年8月10日宣布，原本要在9月1日調漲的Claude Sonnet 5定價方案直接取消，每百萬輸入token $2、輸出$10的「優惠價」將永久生效，不會像原計畫漲到$3/$15。對用Claude Code、Claude API做開發的人來說，這是近期最實在的好消息之一。

什麼是Claude Sonnet 5永久定價？

簡單說，就是Anthropic把原本只到8月底的限時優惠價直接變成正式價格。Sonnet 5從6月上線時就是每百萬輸入token $2、輸出token $10，官方原訂9月1日起漲回標準價$3/$15，等於漲幅50%，現在這個漲價計畫整個取消，優惠價變成長期價格。

為什麼Anthropic突然取消漲價？

官方沒有明講原因，但時機點很難不讓人聯想到價格戰。同期OpenAI持續降價，中國開源模型（如DeepSeek系列）用更低成本打市場，Anthropic選在漲價前3週喊卡，市場解讀是競爭壓力已經傳導到定價決策。Anthropic自己則強調Sonnet 5是設計來取代Opus等級長時間agent工作的模型，維持低價才能守住這個市場定位。

對開發者荷包有什麼實際影響？

如果你原本已經把「9月漲價50%」算進成本規劃，現在可以直接刪掉那筆預算。整理一下前後對比：

原訂9月1日起：輸入 $3/M、輸出 $15/M（漲幅50%）
現在永久價：輸入 $2/M、輸出 $10/M（維持不變）
長時間跑agent、大量呼叫API的團隊，一年下來省下的成本可能相當可觀

對比近期Claude Code重度使用者的成本焦慮，這次Claude Sonnet 5定價凍漲算是罕見的正向消息，也間接證實AI模型市場的價格競爭正在快速壓縮各家的利潤空間。

好不好用，試了才知道。

🇺🇸 Claude Sonnet 5 Pricing: Anthropic Cancels Price Hike

Claude Sonnet 5 pricing just got a surprise reversal: on August 10, 2026, Anthropic announced it is canceling the planned September 1 price hike and making the $2/million input, $10/million output introductory rate permanent — instead of jumping to the originally planned $3/$15 standard pricing. For anyone building on Claude Code or the Claude API, this is one of the few genuinely good pricing headlines this month.

What Is Claude Sonnet 5's Permanent Pricing?

It means Anthropic turned what was supposed to be a time-limited launch discount into the standing price. Sonnet 5 launched in June at $2/M input and $10/M output tokens, with standard pricing of $3/M and $15/M — a 50% increase — originally set to kick in September 1. That increase is now off the table entirely, and the intro rate becomes the long-term price.

Why Did Anthropic Cancel the Price Hike?

Anthropic hasn't stated an explicit reason, but the timing points to competitive pressure. OpenAI keeps cutting prices, and Chinese open-weight labs like DeepSeek are undercutting on cost, so canceling a hike three weeks before it would've taken effect reads as a market response. Anthropic's own framing leans on positioning Sonnet 5 as the model meant to displace pricier Opus-class spend on long-running agent work — staying cheap protects that pitch.

What Does This Mean for Your API Bill?

If you'd already budgeted for a 50% jump in September, you can scrap that line item:

Originally planned from Sept 1: $3/M input, $15/M output (+50%)
Now permanent: $2/M input, $10/M output (unchanged)
Teams running long agent sessions or high-volume API calls could see meaningfully lower annual spend

Against a backdrop of rising cost anxiety among heavy Claude Code users, this permanent Claude Sonnet 5 pricing freeze is rare good news — and it quietly confirms that price competition among frontier labs is squeezing margins across the board.

好不好用，試了才知道。(The proof is in the trying.)

Sources / 資料來源

常見問題 FAQ

Claude Sonnet 5的定價現在是多少？

每百萬輸入token $2美元、輸出token $10美元，這個原本只到8月底的優惠價已於2026年8月10日由Anthropic宣布永久生效。

原本9月1日的漲價計畫還會發生嗎？

不會。Anthropic已正式取消原訂調漲至輸入$3/M、輸出$15/M的標準定價方案，漲幅50%的計畫整個作廢。

Anthropic為什麼取消漲價？

官方未明講具體原因，但時機點緊接在OpenAI降價與中國開源模型（如DeepSeek）低價競爭之後，市場普遍解讀為競爭壓力所致。

這對用Claude Code的開發者有什麼影響？

意味著長期使用Claude Sonnet 5跑agent、寫程式的開發者不需要因應9月漲價調整預算，實質上是成本鬆綁。

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