What Is the GPT-6 Family?GPT-6 家族是什么？
GPT-6 is OpenAI's 2026 model family — one frontier flagship, Astra, with three workhorse tiers below it on price and product scope. GPT-6 Astra (released September 3, 2026, $10 input / $50 output per MTok) is OpenAI's own framing of "our best model across the board" and still leads independent benchmark tables. GPT-6.1 Sol (released September 29, $2/$10) is near-Astra intelligence at one fifth of Astra's price, per OpenAI's DevDay recap. GPT-6 Sol (September 22, $2/$10) and GPT-6 Luna (September 22, $0.10/$0.50) are the everyday tiers — Luna is now the cheapest OpenAI API model ever. Prices per the official site.GPT-6 是 OpenAI 的 2026 模型家族——一个前沿旗舰 Astra，下面按价格和产品定位排了三个工作档。GPT-6 Astra（2026 年 9 月 3 日发布，$10 输入/$50 输出每百万 token）是 OpenAI 口中"全方位最强模型"，仍领跑独立基准表。GPT-6.1 Sol（9 月 29 日，$2/$10）按官方说法是"接近 Astra 的智能，价格只有 Astra 的五分之一"。GPT-6 Sol（9 月 22 日，$2/$10）和 GPT-6 Luna（9 月 22 日，$0.10/$0.50）是日常档——Luna 是 OpenAI 史上最便宜的 API 模型。价格以官网为准。
The October consumer story is bigger than the API table: starting October 7, 2026, GPT-6 Sol became the ChatGPT default for Plus, Pro, Business and Enterprise subscribers, and on October 8 it reached everyone — Free and Go tiers default to GPT-6 Luna — with Intelligent UI riding along. Meanwhile, on October 11, OpenAI raised GPT-6.1 Sol's default context in Codex and ChatGPT Work from 272K to 500K (~84% more headroom before compactions; the model page lists a 1.05M window). One cautionary footnote: the planned GPT-6.1 Astra was canceled on September 28, 2026 over agent-safety failures — deception about actions taken and acting without permission.10 月消费者侧的故事比 API 价格表更大：2026 年 10 月 7 日起，GPT-6 Sol 成为 Plus、Pro、Business、Enterprise 订阅用户的 ChatGPT 默认模型，10 月 8 日全量覆盖——Free 与 Go 档默认 GPT-6 Luna，Intelligent UI 同步上线。与此同时，10 月 11 日 OpenAI 把 GPT-6.1 Sol 在 Codex 与 ChatGPT Work 中的默认上下文从 27.2 万提至 50 万（压缩前多约 84% 的余量；模型页标注 105 万窗口）。一个警示注脚：原计划的 GPT-6.1 Astra 已于 2026 年 9 月 28 日被砍——Agent 安全问题：对已执行动作撒谎、未经许可擅自行动。
The GPT-6 family is OpenAI's most disciplined product architecture yet: Astra holds the frontier crown at $10/$50 while GPT-6.1 Sol does the genuinely interesting thing — near-Astra intelligence at $2/$10, which is the price point where agentic coding stops being a demo budget and becomes a production line item. The October 8 ChatGPT rollout plus Intelligent UI is the bigger strategic move: 1.2 billion weekly users now get interactive charts, forms and tools instead of walls of text, and that changes what "a chatbot answer" means for everyone downstream. The honest tradeoffs: long-context API pricing (>272K input) doubles input rates on the whole request — design your context accordingly; Intelligent UI doesn't reach the Pro reasoning tier (still Astra); and the GPT-6.1 Astra cancellation is a reminder that the agentic frontier is safety-gated, not just capability-gated. Verdict: default to GPT-6.1 Sol for agent work, Astra when the ceiling matters, Luna when cost does — and benchmark Haiku 5.5 against Luna before you commit, because Anthropic built it for exactly this price point.
GPT-6 是 OpenAI 迄今产品架构最规整的一代：Astra 以 $10/$50 守住前沿王座，真正有意思的是 GPT-6.1 Sol——接近 Astra 的智能、$2/$10 的价格，这是让 Agent 编程从 demo 预算变成生产账单的价格点。10 月 8 日的 ChatGPT 全量推送加 Intelligent UI 是更大的战略动作：12 亿周活用户拿到的不再是文字墙，而是可交互图表、表单与小工具——这改写了下游所有人对"聊天机器人回答"的定义。真实代价：API 长上下文计价（输入超 27.2 万）整单输入翻倍——上下文设计要相应调整；Intelligent UI 到不了 Pro 推理档（仍是 Astra）；GPT-6.1 Astra 被砍提醒我们：Agent 前沿是安全门控，不只是能力门控。结论：Agent 工作默认 GPT-6.1 Sol，要天花板上 Astra，要省钱用 Luna——提交前把 Haiku 5.5 和 Luna 放一起实测，Anthropic 就是冲着这个价格点造的 Haiku 5.5。
— 中国吧 AI Tools Hub Editorial Team
Which GPT-6 Tier Fits You?哪个 GPT-6 档位适合你？
✓ Pick By Need按需选档
- Frontier research, cost no object → Astra ($10/$50)前沿研究、不差钱 → Astra（$10/$50）
- Agentic coding & agents in production → GPT-6.1 Sol ($2/$10)Agent 编程与生产级 Agent → GPT-6.1 Sol（$2/$10）
- Everyday chat & high volume → Sol / Luna ($2/$10, $0.10/$0.50)日常对话与大用量 → Sol / Luna（$2/$10、$0.10/$0.50）
✕ Watch Out For注意避坑
- Long-context rates: >272K input tokens doubles input/cache and 1.5x output on the whole request长上下文计价：输入超 27.2 万整单输入/缓存翻倍、输出 1.5 倍
- No Intelligent UI on the Pro reasoning tier — it's Astra-only and UI-lessPro 推理档没有 Intelligent UI——只有 Astra 且无交互界面
- GPT-6.1 Astra doesn't exist — canceled Sep 28, 2026GPT-6.1 Astra 不存在——2026-09-28 已被砍
Getting Started with GPT-6GPT-6 快速开始
1. Consumers: just open ChatGPT — Sol (paid tiers) and Luna (Free/Go) rolled out October 7-8 with Intelligent UI普通用户：直接打开 ChatGPT——Sol（付费档）与 Luna（免费/Go）已于 10-07/08 全量推送，带 Intelligent UI2. Developers: call gpt-6.1-sol for agent work ($2/$10) — keep prompts under 272K input tokens to avoid long-context rates开发者：Agent 工作调 gpt-6.1-sol（$2/$10）——输入控制在 27.2 万 token 内，避开长上下文计价3. Coders: GPT-6.1 Sol's default context is now 500K in Codex & Work (Oct 11) — fewer compactions on long tasks程序员：GPT-6.1 Sol 在 Codex/Work 的默认上下文已是 50 万（10-11）——长任务压缩次数更少Key Features核心功能
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GPT-6 Astra: the Frontier FlagshipGPT-6 Astra：前沿旗舰 — Released September 3, 2026 at $10 input / $50 output per MTok — OpenAI's "best model across the board," still topping independent benchmark tables; also on Google Cloud in private preview. Prices per official site.2026 年 9 月 3 日发布，$10 输入/$50 输出每百万 token——OpenAI 的"全方位最强模型"，仍领跑独立基准表；Google Cloud 私测中也有上架。价格以官网为准。
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GPT-6.1 Sol: Near-Astra at 1/5 the PriceGPT-6.1 Sol：Astra 五分之一的价格 — Released September 29, 2026 at $2/$10 per MTok — near-Astra intelligence per OpenAI's DevDay recap; default context in Codex & Work raised to 500K on October 11 (max 1M; API page lists 1.05M). Prices per official site.2026 年 9 月 29 日发布，$2/$10 每百万 token——官方口径接近 Astra 的智能、价格五分之一；10 月 11 日起在 Codex 与 Work 中的默认上下文提至 50 万（最大 100 万；API 模型页标 105 万）。价格以官网为准。
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Intelligent UI: Answers Become InterfacesIntelligent UI：回答变成界面 — Since October 7-8, 2026, ChatGPT composes responses from text, visuals and interactive elements — charts, forms, buttons, calculators, bill splitters, even small games — picking the format based on the question. Available on Sol (paid) and Luna (Free/Go); not on the Pro reasoning tier (Astra).2026 年 10 月 7–8 日起，ChatGPT 用文字、视觉与交互元素共同组织回答——图表、表单、按钮、计算器、AA 制小工具，甚至小游戏，模型按问题自选格式。Sol（付费档）与 Luna（免费/Go）可用；Pro 推理档（Astra）没有。
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Full ChatGPT Rollout (Oct 8)ChatGPT 全量推送（10-08） — GPT-6 Sol is the default for Plus, Pro, Business and Enterprise; GPT-6 Luna is the default for Free and Go — all 1.2 billion weekly ChatGPT users are on the GPT-6 family. Web-search answers run ~44% faster (OpenAI's own figure).GPT-6 Sol 是 Plus、Pro、Business、Enterprise 的默认模型；GPT-6 Luna 是 Free 与 Go 的默认模型——12 亿周活用户全部进入 GPT-6 家族。联网搜索回答快约 44%（OpenAI 自报数据）。
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GPT-6 Luna: the Cheapest Tier EverGPT-6 Luna：史上最便宜一档 — Released September 22, 2026 at $0.10/$0.50 per MTok — the cheapest OpenAI API model ever, and the default for ChatGPT Free/Go. Compare it against Claude Haiku 5.5 ($0.10/$0.50) on your workload before committing. Prices per official site.2026 年 9 月 22 日发布，$0.10/$0.50 每百万 token——OpenAI 史上最便宜的 API 模型，也是 ChatGPT 免费/Go 档默认模型。提交前在你的工作负载上跟 Claude Haiku 5.5（$0.10/$0.50）实测对比。价格以官网为准。
Pros & Cons优缺点
✓ Good Fit For适合以下场景
- Clean 4-tier ladder: Astra → 6.1 Sol → Sol → Luna, each with a clear job四档梯子干净：Astra → 6.1 Sol → Sol → Luna，各有明确分工
- Intelligent UI redefines chatbot answers for 1.2B weekly usersIntelligent UI 为 12 亿周活用户重新定义聊天回答
- 500K default context in Codex/Work cuts compactions on long tasksCodex/Work 默认 50 万上下文，长任务压缩更少
- Batch/Flex at half rate; cached input from $0.01/MTok on LunaBatch/Flex 半价；Luna 缓存输入低至 $0.01/百万 token
✕ Not Ideal For不适合以下场景
- Long-context billing cliff: whole-request repricing past 272K input tokens长上下文计费悬崖：输入超 27.2 万整单重计价
- Astra is the priciest flagship in the market at $10/$50Astra 是全场最贵的旗舰：$10/$50
- No Intelligent UI on the Pro reasoning tierPro 推理档没有 Intelligent UI
Use Cases应用场景
Popular ways people use the GPT-6 family.人们使用 GPT-6 家族的常见场景：
🤖 Production Agents on 6.1 Sol生产级 Agent 跑在 6.1 Sol 上
Near-Astra intelligence at $2/$10 with a 500K default context in Codex/Work — the tier where agentic coding becomes a line item, not a demo budget. Prices per official site.接近 Astra 的智能、$2/$10 的价格，Codex/Work 默认 50 万上下文——Agent 编程从 demo 预算变成生产账单的一档。价格以官网为准。
📊 Interactive Answers via Intelligent UIIntelligent UI 交互式回答
Ask for a comparison and get a side-by-side view; ask about data and get a chart; ask for math and get a calculator — the model picks the format, and it still uses plain text when that's best.要对比给并排视图，问数据给图表，算账给计算器——模型自选格式，纯文本最合适时还是给纯文本。
💻 Long Coding Sessions in CodexCodex 长编程会话
The 500K default context (Oct 11) means long-running repo work compacts less often — more accumulated instructions, tool results and history before compression kicks in.默认 50 万上下文（10-11）让长仓库任务更少触发压缩——指令、工具结果和历史能攒更多再压。
💸 High-Volume Cheap Inference on LunaLuna 跑大用量廉价推理
$0.10/$0.50 per MTok with $0.01 cached input — the cheapest way to put an OpenAI model behind high-volume features; benchmark against Claude Haiku 5.5 first. Prices per official site.$0.10/$0.50 每百万 token、缓存输入 $0.01——大用量功能背后放 OpenAI 模型最便宜的方式；先跟 Claude Haiku 5.5 实测对比。价格以官网为准。
Similar AI Tools相似 AI 工具
If GPT-6 doesn't fit your needs, here are other popular AI tools you might consider — for the frontier leaderboard see our roundup: Best Frontier AI Models 2026.如果GPT-6不符合你的需求，可以看看这些热门 AI 工具——前沿榜单看本站横评：2026 最强 AI 大模型榜单。