RETIRED DIRECT API · 2026-10-23

o1 is retired.

In the latest registry snapshot, gpt-6.1-sol has a higher ECI estimate and a lower direct API price than the originally announced replacement.

REPLACEMENT DECISION

Choose what matters now.

Current direct API prices, per 1M tokens at 75% input / 25% output. Higher ECI means higher estimated general capability.

ModelBlended priceECI estimateContext

RETIREDo1Unavailable141.8139.9–143.0Unverified

CURRENT UPGRADE · SAME PROVIDERgpt-6.1-sol$4.0050% less than announced167.8164.3–172.5 · +5.3 vs announced922,000

LOW-COST OPTION · SAME PROVIDERgpt-6-luna$0.2098% less than announced156.8154.0–159.4 · -5.8 vs announced922,000

ORIGINALLY ANNOUNCED REPLACEMENTgpt-5.6-sol$8.00per 1M tokens162.6159.6–166.2922,000

The announced replacement is historical provider guidance, not an evergreen recommendation. Current upgrades require at least 10% lower price, 2 more ECI points and no less published context. ECI ranges may overlap; neither ECI nor context proves task success or API compatibility. The low-cost option also clears the retired model's ECI lower bound.

Prices verified 2026-11-02; current ECI snapshot 2026-11-01. The retired model has no verified current price or context here. Retirement applies to the OpenAI direct API; seller routes need separate evidence. Retirement notice · ECI data · Browse current models.