OpenAI00:00Feature UpdatesOfficial Docs
OpenAI ships a new GPT-5.4 API snapshot
Pin a snapshot to reduce behavior drift in production.
Key Points
- 1New snapshot: gpt-5.4-2026-03-05
- 2Reasoning effort is configurable in tiers
- 3Extra pricing multipliers for very long inputs
OpenAI published a new GPT-5.4 snapshot (gpt-5.4-2026-03-05). It clarifies reasoning effort controls and long-input pricing behavior. Using snapshots helps keep production behavior stable.