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RETIRED DIRECT API · 2026-10-23

GPT-4.1 nano is retired.

gpt-5.6-luna is its 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
RETIREDGPT-4.1 nanoUnavailable129.6124.5–131.8Unverified
LOW-COST OPTION · SAME PROVIDEROpenAI logogpt-6-luna$0.2056% less than announced156.8154.0–159.4 · +0.1 vs announced922,000
ORIGINALLY ANNOUNCED REPLACEMENTOpenAI logogpt-5.6-luna$0.45per 1M tokens156.7154.2–159.3922,000

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.