Next-gen model names surface: Opus 5.5, Fable 5.1, GPT-6 Astra — labs said to be ~2 months ahead internally
haider1 · x · 2026-09-24
A roundup of rumored next-gen model names — Anthropic's Opus 5.5, xAI's Fable 5.1, and OpenAI's GPT-6 Astra — with the claim that both OpenAI and Anthropic have more advanced internal models. OpenAI reportedly showed internal-model performance graphs around its Navier-Stokes work, suggesting internal versions are roughly two months ahead of public releases. Unconfirmed speculation.
More from Models
- Opus 5.5 usage quota holds up well, user says it never ran out before reset — dotey · 2026-09-24
- Why GPT-6's rumored recurrent-depth architecture could change inference economics — panic_in_the_galaxy · 2026-09-24
- Jev, a No-Text Model Claiming 200x Faster Decisions, Sparks 'Is a Well-Formatted Wrong Answer Still a Hallucination?' — jamesbrooksco · 2026-09-24
- Hands-on: Jev Beats Gemini Flash on Accuracy, Latency, and Cost — cantrell · 2026-09-24
- User cancels switch to Codex after Opus 5.5's 40% price cut wins him back — ayushtweetshere · 2026-09-24
- Codex completes steps Claude refuses twice in one day, dev reports — ChanceKelch · 2026-09-24