Thread · 3 stories · Feb 12 – Jun 16 · concluded
The reasoning-model launch that defined early 2025: o3 with Operator and Deep Research at $200/month, then o3 and o4-mini, then o3-pro at 80% less.
Jump to timeline ↓OpenAI opened 2025 by putting o3 behind a $200-a-month Pro tier alongside Operator and Deep Research — the first time frontier reasoning was priced as a professional subscription.
By April o3 shipped properly with o4-mini beneath it, posting 87.7% on GPQA Diamond and 71.7% on SWE-Bench Verified. In June o3-pro matched o3's ARC results at 80% lower cost, closing the cycle where it began: on price.
