GPT 6 Astra edited Stockfish’s NNUE weights and search. The experimental build scored 131–125 against official Stockfish in 256 local games (~+8 Elo, wide 95% interval −15 to +31). Still testing whether there’s a real gain.

GPT-6.2: Coming this week OpenAI appears to be quietly A/B testing its next flagship, GPT-6.2 Astra. • The picker still says GPT-6 Astra, but some Codex usage analytics now list "gpt-6.2-astra" separately • Multiple users are seeing it, suggesting a gray rollout with some traffic already being routed to 6.2 • "gpt-6.2-astra" has also reportedly surfaced in an API response For context, GPT-6 Astra only launched on Sept 3 at $10/M input and $50/M output. A 6.2 just two months later shows how fast OpenAI is moving. Astra scored 57.9% on Terminal-Bench 4.0 vs 55.8% for Fable 5.1, and with a new Fable coming, that lead is too small to sit on. Efficiency is also worth watching. Codex users have complained that Astra burns through usage limits too quickly. My prediction: GPT-6.2 Astra drops this week to go head-to-head with Fable 5.5. Fable 5.5 is also expected soon: "claude-fable-5-5" surfaced in Azure’s catalog marked “Generally Available,” partners reportedly have access, and both previous Fable launches landed on a Tuesday. Anthropic’s IPO is also approaching, with its S-1 public and ANT lined up as its Nasdaq ticker. GPT-6.2 Astra vs Fable 5.5 drop happen in a few day time which means 1 thing, This week could get crazy.