CURRENT SAME-PROVIDER CANDIDATE
gpt-5-nano
Lowest priced current option clearing the historical ECI screen.
GPT-3.5 Turbo (June 2023) is retired.
What replaces GPT-3.5 Turbo (June 2023)?
For a direct OpenAI API replacement for GPT-3.5 Turbo (June 2023), compare gpt-5-nano first. As of 2026-11-02, its verified Standard blended price is $0.1375 per 1M tokens at a 75% input / 25% output mix. Among current same-provider models, it is the lowest-priced option whose ECI lower bound clears the retired model's lower bound. ECI is an estimated general-capability measure; this is not a task-performance guarantee.
Historical ECI 113.3 · Current direct API price unavailable
REPLACEMENT DECISION
Replace GPT-3.5 Turbo (June 2023) today.
Direct API prices at 75% input / 25% output. ECI is estimated general capability, not task success.
The provider's announced successor has no verified current tariff for its exact ID; the current choice is screened against historical ECI without a context-equivalence claim. ECI intervals can overlap; no choice guarantees task results or API compatibility.
Replacement questions
Which replacement did OpenAI announce for GPT-3.5 Turbo (June 2023)?
OpenAI announced gpt-3.5-turbo. We have no verified current direct API price for that exact ID. Provider notice.
Is the replacement for GPT-3.5 Turbo (June 2023) API compatible?
API compatibility has not been verified. Check the provider's migration guidance and test your integration before switching.
Prices verified 2026-11-02; ECI snapshot 2026-11-01. Retirement applies to the OpenAI direct API; seller routes need separate evidence. Retirement notice · ECI data · Browse current models.