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OpenAI GPT-6 Astra breaks long-unsolved Enigma message

A Hacker News post reports that OpenAI's GPT-6 Astra broke an Enigma message that had resisted solution since 2005. The linked page is on cryptocellar.org.

First seen 21 Sep, 12:00 UTC on openai.com12 sourcesLast update 23d ago

How GPT-6 Astra compares

List prices per million tokens, context and Arena's text leaderboard, against OpenAI's other top models and the leading labs' best. The percentages are GPT-6 Astra's price against each.

ModelReleasedInputOutputContextArena
GPT-6 AstraSeptember 2026$10.00$50.001.05M#30 1475
GPT-6 LunaSeptember 2026$0.10 +9900%$0.50 +9900%1.05Mnot ranked yet
GPT-6 SolSeptember 2026$2.00 +400%$10.00 +400%1.05M#57 1456
Claude Opus 5.5September 2026$4.00 +150%$20.00 +150%1M#2 1507
Gemini 4 ArgonOctober 2026$2.00 +400%$10.00 +400%1M#1 1525
Muse WonderOctober 2026$4.00 +150%$20.00 +150%1Mnot ranked yet

Arena ranks the best effort setting of each model among all models on its text leaderboard. Every model and price.

What the sources say

Linked, never rewritten. Official means the lab itself.

Official4

openai.com· 21 Sep, 12:00Higgsfield AI ships new video features in a day with GPT-6 Astraopenai.com· 22 Sep, 12:00Parallel cut research time and cost in half with GPT‑6 Astraopenai.com· 23 Sep, 12:00How invideo improves color grading 3x with GPT‑6 Astraopenai.com· 23 Sep, 12:00Harvey turns legal context into stronger drafts with GPT-6 Astra

Press2

The Decoder· 26 Sep, 09:44OpenAI's GPT-6 Astra can now tell you exactly where you screwed up your IKEA shelfThe Decoder· 27 Sep, 10:59Researchers plug GPT-6 Astra directly into a robot and let it clean up an unfamiliar kitchen

Community6

Hacker News· 22 Sep, 13:52OpenAI GPT, 6 Astra breaks Enigma message that has resisted solution since 2005705 points · 412 commentsr/OpenAI· 23 Sep, 10:58Last October, AIs could automate 2.5% of randomly chosen remote projects. Our latest Remote Labor Index results show that GPT-6 Astra can now automate 20.8%.r/singularity· 23 Sep, 13:00GPT-6 Astra makes a massive leap on ZeroBench (an extremely difficult vision benchmark), surpassing the human baseline across all three metricsHacker News· 23 Sep, 15:14GPT-6 Astra has gained the ability to drive a car5 points · 1 commentsr/singularity· 25 Sep, 15:09C5R built a research facility that is run entirely by GPT-6 Astra - the model designs, executes, and observes experiments end-to-end across biology, chemistry, and materials science - it controls people and instruments aroundr/singularity· 25 Sep, 18:19This is fun. I finally got to follow up on a RemindMe comment. Back on March 25 of this year, six months ago, no model was getting even 1% on ARC-AGI-3. A commenter asked if we could see 75% at $2 cost. Well, the cost is still high ($26.1k), but GPT-6-Astra-Max was able to get 62.7% (no harness!)

How it unfolded

Every source in the order it appeared. Times in UTC.

21 Sep 12:00openai.com Higgsfield AI ships new video features in a day with GPT-6 Astra22 Sep 12:00openai.com Parallel cut research time and cost in half with GPT‑6 Astra22 Sep 13:52Hacker News OpenAI GPT, 6 Astra breaks Enigma message that has resisted solution since 200523 Sep 10:58r/OpenAI Last October, AIs could automate 2.5% of randomly chosen remote projects. Our latest Remote Labor Index results show that GPT-6 Astra can now automate 20.8%.23 Sep 12:00openai.com How invideo improves color grading 3x with GPT‑6 Astra23 Sep 12:00openai.com Harvey turns legal context into stronger drafts with GPT-6 Astra23 Sep 13:00r/singularity GPT-6 Astra makes a massive leap on ZeroBench (an extremely difficult vision benchmark), surpassing the human baseline across all three metrics23 Sep 15:14Hacker News GPT-6 Astra has gained the ability to drive a car25 Sep 15:09r/singularity C5R built a research facility that is run entirely by GPT-6 Astra - the model designs, executes, and observes experiments end-to-end across biology, chemistry, and materials science - it controls people and instruments around25 Sep 18:19r/singularity This is fun. I finally got to follow up on a RemindMe comment. Back on March 25 of this year, six months ago, no model was getting even 1% on ARC-AGI-3. A commenter asked if we could see 75% at $2 cost. Well, the cost is still high ($26.1k), but GPT-6-Astra-Max was able to get 62.7% (no harness!)26 Sep 09:44The Decoder OpenAI's GPT-6 Astra can now tell you exactly where you screwed up your IKEA shelf27 Sep 10:59The Decoder Researchers plug GPT-6 Astra directly into a robot and let it clean up an unfamiliar kitchen

What the numbers did

Signals for OpenAI from two hours before this story to ten days after: leaderboards, app charts, usage, prices and status.

UsageOpenAI's share of OpenRouter spend up 1.3 points in a week, to 27.1%StatusOpenAI reports degraded service: Help Center & Support Chat is downStatusOpenAI's status page is back to normal after 6 hoursStatusOpenAI reports degraded service: Elevated errors in ChatGPT Space PagesUsageOpenAI's share of OpenRouter spend up 1.4 points in a week, to 27.2%UsageOpenAI's share of OpenRouter spend up 1.5 points in a week, to 27.4%

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