GPT-5.6 and Grok 4.5 Lead AI Model Race; Data Privacy Concerns Emerge

Key Takeaways

1. Sam Altman announces GPT-5.6 with halved price and doubled token efficiency, agentic product usage grew 2.5x last week, and Codex+ChatGPT Work now has 7M active users.
2. Elon Musk claims Grok 4.5 ranks #1 on Long-Horizon Terminal-Bench, citing speed as key advantage; also addresses SpaceXAI data retention concerns.
3. Open-source model share in gateway tokens jumped from 11% to 29% since April, per Guillermo Rauch.
4. Privacy issues surface: SpaceXAI accused of uploading user code to cloud; Amjad Masad warns Grok Build CLI uploads entire Git repos to Google Cloud bucket with secrets.
5. Nikita Bier's tweet visibility tweak boosts replies by 3.15% and original posts by 1.8% with negligible time spent loss.
6. Patrick Collison notes UK startup data likely underestimated, highlighting measurement challenges in the AI era.

1. AI Models and Infrastructure

1. Sam Altman unveils GPT-5.6 sol with half the price and roughly double token efficiency, enabling the same task at a quarter of the cost. — via 1 2
2. Elon Musk announces Grok 4.5 ranks first on Long-Horizon Terminal-Bench, emphasizing its speed advantage for maintaining flow state. — via 1 2
3. Guillermo Rauch reports open-source model usage in gateway tokens rose from 11% to 29% since April, reflecting growing adoption. — via 1
4. Aravind Srinivas highlights NVIDIA Vera Rubin NVL72 with NVLink 6 delivering 10x performance-per-watt improvement. — via 1

2. AI Safety and Data Privacy

1. Sam Altman expresses concern over SpaceXAI being accused of uploading user code to the cloud. — via 1
2. Elon Musk clarifies SpaceXAI's Zero Data Retention policy, stating CLI does not retain data and the /privacy command deletes synced data; Grok Build data retention is off by default. — via 1 2 3 4
3. Amjad Masad warns that Grok Build CLI uploads entire Git repositories to Google Cloud bucket, potentially exposing private code and secrets. — via 1

3. Product Updates and Growth Metrics

1. Sam Altman reports Codex and ChatGPT Work now have 7 million active users, and agentic product usage grew 2.5x in the past week. — via 1
2. Yohei launches RunAnywhere app with full local inference, device-aware model recommendations, tool calling, and real-time camera analysis on iOS and Android. — via 1
3. Nikita Bier rolls out a tweet visibility tweak that boosts replies by 3.15%, original posts by 1.8%, and small account reach by 1.19%, with negligible time spent loss. — via 1 2
4. tobi lutke announces DoorDash is now available on the Shopify App Store, enabling local on-demand delivery. — via 1

4. Economic and Startup Insights

1. Patrick Collison notes that UK official startup data may be significantly underestimated, based on Stripe's analysis; this measurement challenge will become more critical in the AI era. — via 1
2. Paul Graham advises that startup initial ideas should be precise and small, clearly defining first users, rather than grand and vague. — via 1