AINewsnow

With Opus 5.5 and Sonnet 5.5 both apparently outperforming Sol and Astra, Anthropic has technically made OpenAI’s Dev Day a lot more interesting. OpenAI is reportedly planning 20+ launches tomorrow, so I’m really curious to see what they have in store now. The timing couldn’t be more interesting. 😅

This story is from 2026-09-29. It is preserved in the archive; the latest stories are on the live feed.

They launched Sonnet 5.5 just day before Dev Day and is almost matching benchmarks of Opus 5.5

Read the full story at r/OpenAI ↗

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  1. 2026-09-29 04:29 · r/OpenAI
    With Opus 5.5 and Sonnet 5.5 both apparently outperforming Sol and Astra, Anthropic has technically made OpenAI’s Dev Day a lot more interesting. OpenAI is reportedly planning 20+ launches tomorrow, so I’m really curious to see what they have in store now. The timing couldn’t be more interesting. 😅

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  2. OpenAI Scraps Debut of Latest Astra Model Over Safety Risks — Bloomberg AI
  3. Heads of OpenAI and Anthropic called to face Senate inquiry after rogue agent incidents — The Guardian AI
  4. Rogue AI accessed federal websites, posted user images online, ChatGPT says — France 24 — Artificial Intelligence
  5. Scoop: Top AI companies probing tens of thousands of security incidents — Axios AI+
  6. Opus 5.5 — r/ClaudeAI
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  8. Bill Gates warns of AI risks, calls for Congress to step in: 'It's not a hoax at all' — Mint AI

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