OpenAI's Decisions API Falls Short of TypeSafe's Jev in Benchmarks

OpenAI launched a beta Decisions API returning probabilities for options, but benchmarks by developers show it trails TypeSafe's Jev by 5-10% while costing twice as much, and it simply copies market prices when they appear in context.

2026-10-07 ~ 2026-10-08 · 4 related posts

• Benchmark: OpenAI Decisions API costs 2x more, 5-10% worse than Jev — xeophon · 2026-10-07
• OpenAI and Cloudflare launch decision APIs — tested at 355 decisions, TypeSafe's Jev still decides more — PawelHuryn · 2026-10-08
• Dev pits OpenAI Decisions API against Jev, Clef and Polymarket — models just copy the market — Physical_Pepper6294 · 2026-10-08

1 near-duplicate retellings: Physical_Pepper6294