Carbon 与 Argon 的 API 单价完全相同($2/$10 至 11 月 30 日,之后 $4/$20),上下文同为 1M,请求结构也一样——从 Argon 迁移只需改模型名。Google 自述两者的「主要差异是每轮花多少思考 token」。那么问题就变成:多花的思考 token,什么时候值回票价?本站综合 SeedRouter 与老张博客 11 月 11 日的同提示词测试,给出答案:简单任务上 Carbon 贵 3 倍、慢近 3 倍;难任务上它反而更便宜,而且能答对 Argon 答错的题。
SeedRouter 用 3 个提示词、medium 档、maxOutputTokens 8192 对两个模型做了同场测试:两者 3 题全对。差异在 token 上:Carbon 计费输出 1,010 tokens,对 Argon 的 701——约多 44%(小样本,仅供参考)。有意思的是,Carbon 不总是思考更多:阶乘任务上 Carbon 只用了 71 个思考 tokens,Argon 用了 249。延迟跟思考量走,不跟模型名走——最慢的一项(代码修复)用了 18.4 秒。
老张博客的样本更大:同一组 11 个评分任务经同一 API 网关发给两个模型,全部通过;但 Carbon 默认档的输出 token 是 Argon 的 3.8 倍、成本 3.05 倍、耗时 2.75 倍。短词题上,Argon 约 5 秒出首词,Carbon 约 10 秒。这就是「同价不同账」的含义:单价表上两者一行,账单上 Carbon 按任务类型贵 0.4 到 3 倍不等。
同一篇老张博客测试里,一份 1,500 行日志的精确计数任务:Argon 默认档 22 秒给出错误答案,Carbon 214 秒给出正确答案。AA 指数的 9 项子评估里,Carbon 全面高于 Argon,分差从 16.5 分到 0.3 分不等;总分 60 对 50。编码 Agent 任务上(AA,10 月 30 日数据):Carbon 每任务 $7.74,Argon $11.73——Carbon 反而便宜了约三分之一,因为它一次做对、少绕圈子。安全与诚实指标的差距更大:作弊尝试 3.6%→0.4%(成功 2.4%→0%),Agent 诚实基准 70%→92%。
但 Carbon 也有翻车点:同一组测试里,Carbon 在 high 档处理长日志时,在写出一个字之前就耗尽了输出 tokens——思考把上限吃光了。这是 Carbon 特有的失败模式,详见本站思考档位与避坑指南。
| 任务类型 | 选谁 | 理由 |
|---|---|---|
| 交互式编程、日常功能开发 | Argon | 答案一样,Carbon 贵 3 倍、慢近 3 倍 |
| SaaS 自动化、有人等的任务 | Argon | 首 token 更快,账单更低 |
| 疑难调试、根因分析 | Carbon | Argon 答错的题,Carbon 能答对 |
| 长程 Agent、复杂多步编程 | Carbon | 编码 Agent 任务成本反而更低($7.74 对 $11.73) |
| 安全审查、长文档精确分析 | Carbon | 8/8 漏洞、7/7 日志分析(Quantslant 实测) |
| 科学推理 | Carbon | AA 9 项子评估全面领先 |
Google 的迁移指南说,从 Argon 换 Carbon 不需要改请求结构——但有三处默认值值得注意:thinking_level 留默认 medium;max_output_tokens 至少设 32,768(思考与答案共享上限,设低了会空手而归);HTTP 超时至少 15 分钟;high 档只配更大的输出预算。另外注意:Carbon 忽略 temperature、topP、topK;thinking_budget 与 minimal 档会返回 HTTP 400;从默认 high 的 Gemini 3.1 Pro Preview 迁移过来的团队,不改代码会默认降到 medium,可能误读为能力倒退。
参考来源:本文为本站原创改写与整理,事实与数据核对自 SeedRouter 同提示词测试与老张博客对照测试(2026-11-11)
← 返回 Gemini 4 Carbon 专题Carbon 與 Argon 的 API 單價完全相同($2/$10 至 11 月 30 日,之後 $4/$20),上下文同爲 1M,請求結構也一樣——從 Argon 遷移只需改模型名。Google 自述兩者的「主要差異是每輪花多少思考 token」。那麼問題就變成:多花的思考 token,什麼時候值回票價?本站綜合 SeedRouter 與老張博客 11 月 11 日的同提示詞測試,給出答案:簡單任務上 Carbon 貴 3 倍、慢近 3 倍;難任務上它反而更便宜,而且能答對 Argon 答錯的題。
SeedRouter 用 3 個提示詞、medium 檔、maxOutputTokens 8192 對兩個模型做了同場測試:兩者 3 題全對。差異在 token 上:Carbon 計費輸出 1,010 tokens,對 Argon 的 701——約多 44%(小樣本,僅供參考)。有意思的是,Carbon 不總是思考更多:階乘任務上 Carbon 只用了 71 個思考 tokens,Argon 用了 249。延遲跟思考量走,不跟模型名走——最慢的一項(代碼修復)用了 18.4 秒。
老張博客的樣本更大:同一組 11 個評分任務經同一 API 網關發給兩個模型,全部通過;但 Carbon 默認檔的輸出 token 是 Argon 的 3.8 倍、成本 3.05 倍、耗時 2.75 倍。短詞題上,Argon 約 5 秒出首詞,Carbon 約 10 秒。這就是「同價不同賬」的含義:單價表上兩者一行,賬單上 Carbon 按任務類型貴 0.4 到 3 倍不等。
同一篇老張博客測試裏,一份 1,500 行日誌的精確計數任務:Argon 默認檔 22 秒給出錯誤答案,Carbon 214 秒給出正確答案。AA 指數的 9 項子評估裏,Carbon 全面高於 Argon,分差從 16.5 分到 0.3 分不等;總分 60 對 50。編碼 Agent 任務上(AA,10 月 30 日數據):Carbon 每任務 $7.74,Argon $11.73——Carbon 反而便宜了約三分之一,因爲它一次做對、少繞圈子。安全與誠實指標的差距更大:作弊嘗試 3.6%→0.4%(成功 2.4%→0%),Agent 誠實基準 70%→92%。
但 Carbon 也有翻車點:同一組測試裏,Carbon 在 high 檔處理長日誌時,在寫出一個字之前就耗盡了輸出 tokens——思考把上限喫光了。這是 Carbon 特有的失敗模式,詳見本站思考檔位與避坑指南。
| 任務類型 | 選誰 | 理由 |
|---|---|---|
| 交互式編程、日常功能開發 | Argon | 答案一樣,Carbon 貴 3 倍、慢近 3 倍 |
| SaaS 自動化、有人等的任務 | Argon | 首 token 更快,賬單更低 |
| 疑難調試、根因分析 | Carbon | Argon 答錯的題,Carbon 能答對 |
| 長程 Agent、複雜多步編程 | Carbon | 編碼 Agent 任務成本反而更低($7.74 對 $11.73) |
| 安全審查、長文檔精確分析 | Carbon | 8/8 漏洞、7/7 日誌分析(Quantslant 實測) |
| 科學推理 | Carbon | AA 9 項子評估全面領先 |
Google 的遷移指南說,從 Argon 換 Carbon 不需要改請求結構——但有三處默認值值得注意:thinking_level 留默認 medium;max_output_tokens 至少設 32,768(思考與答案共享上限,設低了會空手而歸);HTTP 超時至少 15 分鐘;high 檔只配更大的輸出預算。另外注意:Carbon 忽略 temperature、topP、topK;thinking_budget 與 minimal 檔會返回 HTTP 400;從默認 high 的 Gemini 3.1 Pro Preview 遷移過來的團隊,不改代碼會默認降到 medium,可能誤讀爲能力倒退。
參考來源:本文爲本站原創改寫與整理,事實與數據覈對自 SeedRouter 同提示詞測試與老張博客對照測試(2026-11-11)
← 返回 Gemini 4 Carbon 專題Carbon and Argon share identical API prices ($2/$10 through November 30, then $4/$20), the same 1M context, and the same request schema — migrating from Argon means changing only the model string. Google says "the main difference is how many thinking tokens each model spends per turn". So the question becomes: when is the extra thinking worth paying for? Synthesizing SeedRouter's and laozhang.ai's same-prompt tests from November 11, the answer is: on easy tasks Carbon costs 3x and takes nearly 3x as long; on hard tasks it is actually cheaper — and it gets right what Argon gets wrong.
SeedRouter ran 3 prompts on both models at medium thinking with maxOutputTokens 8192: both answered all 3 correctly. The difference was tokens: Carbon billed 1,010 output tokens against Argon's 701 — about 44% more (a tiny sample, treat as indicative only). Interestingly, Carbon doesn't always think more: on a factorial task Carbon used 71 thinking tokens against Argon's 249. Latency followed thinking volume, not the model name — the slowest item (a code fix) took 18.4 seconds.
Laozhang.ai's sample was bigger: the same 11 graded prompts sent to both models through one API gateway, all passed; but at default settings Carbon wrote 3.8x Argon's output tokens, cost 3.05x as much and took 2.75x as long. On a short word problem, Argon's first words arrived after about 5 seconds, Carbon's after about 10. That is what "same price, different bill" means: one row on the price sheet, but a bill 0.4x to 3x higher depending on the task.
In the same laozhang.ai test, an exact-count task over a 1,500-line log: Argon at default settings answered wrong in 22 seconds; Carbon answered right in 214. Across the AA index's 9 sub-evaluations Carbon beats Argon on all of them, by margins from 16.5 points down to 0.3; overall 60 vs 50. On coding-agent tasks (AA, October 30 data), Carbon cost $7.74 per task against Argon's $11.73 — Carbon was about a third cheaper, because it got things right the first time instead of looping. The safety and honesty gaps are larger still: cheating attempts 3.6% → 0.4% (successful 2.4% → 0%), agentic honesty benchmark 70% → 92%.
Carbon has its own failure mode, though: in the same test, Carbon at high effort ran out of output tokens on the long log before writing a single word — thinking ate the whole budget. See our thinking levels and pitfalls guide.
| Task type | Pick | Why |
|---|---|---|
| Interactive coding, day-to-day feature work | Argon | Same answers; Carbon costs 3x and takes ~3x as long |
| SaaS automation, anything a user waits on | Argon | Faster first token, lower bill |
| Tough debugging, root-cause analysis | Carbon | Gets right what Argon gets wrong |
| Long-horizon agents, complex multi-step coding | Carbon | Lower cost per coding-agent task ($7.74 vs $11.73) |
| Security review, exact long-document analysis | Carbon | 8/8 vulnerabilities, 7/7 log analysis (Quantslant) |
| Science reasoning | Carbon | Leads all 9 AA sub-evaluations |
Google's migration guide says moving from Argon to Carbon needs no request changes — but three defaults deserve attention: leave thinking_level at its default medium; set max_output_tokens to at least 32,768 (thinking and answer share the cap — set it low and you get nothing back); set HTTP timeouts to at least 15 minutes; and use high only with a larger output budget. Also note: Carbon ignores temperature, topP and topK; thinking_budget and the minimal level return HTTP 400; and teams coming from Gemini 3.1 Pro Preview (which defaults to high) drop a level without changing code, which can read as a regression.
Reference source: this article is an original rewrite produced by this site; facts and figures were checked against SeedRouter same-prompt test and laozhang.ai comparison (Nov 11, 2026)
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