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OpenAI

GPT-5.4 Nano

GPT-5.4 Nano is a OpenAI model with 400K context, $0.20 in / $1.25 out per million tokens, last verified October 25, 2026. Open weights: no. Status: Superseded since October 1, 2026; the current pick is GPT-6 Luna. Public-board scores are linked to the publisher; vendor-only figures stay in the watch-out, not on the board.

OpenAI’s GPT-5.4 small tier for classification, extraction, ranking and subagents, at $0.20/$1.25 per million tokens.

Recorded profile verification October 25, 2026Individual provider fields may changeAccess: deprecated — Deprecated October 1, 2026; scheduled API shutdown April 1, 2027 for both gpt-5.4-nano and gpt-5.4-nano-2026-03-17. Recommended replacement gpt-6-luna.

AI model specification details
SpecificationGPT-5.4 Nano
ProviderOpenAI
TierBudget
Context window400K
Max output128K
Input / 1M tokens$0.20
Output / 1M tokens$1.25
WeightsClosed
ParametersNot verifiedUnverified
Reasoning levelsnone, low, medium, high, xhigh
Modalitiestext, image
API model idgpt-5.4-nano
ReleasedMarch 17, 2026

Pricing tiers: All amounts are USD per MTok. Standard: input/output $0.20/$1.25, cached input $0.02. Batch: input/output $0.10/$0.625, cached input $0.01. Flex: input/output $0.10/$0.625, cached input $0.01. Regional processing and FedRAMP add 10% where the model and route are eligible; region eligibility is separate from a quoted tariff. Server-side tools and their tokens can add charges.

Best for

  • Classification
  • Summarisation
  • High-volume chat

Watch out

Deprecated October 1, 2026; migrate to GPT-6 Luna before the announced April 1, 2027 API shutdown. The current card still lists 400K context and 128K output, with no computer use or tool search. Do not transfer successor benchmark results or infer that the old API ID already routes elsewhere.

History

GPT-5.4 Nano timeline

Release and status events for this model that passed two-source verification — dated, sourced, and linked.

  • GPT-5.4 Nano API deprecationStatus updateOctober 1, 2026

    OpenAI deprecates gpt-5.4-nano and its March 17 snapshot, scheduling API removal for April 1, 2027.

    OpenAI API deprecations

Source receipts

Catalog figures for this model were checked against the following sources.

Common questions

GPT-5.4 Nano

Answered from the verified figures on this page rather than general guidance.

How much does GPT-5.4 Nano cost per million tokens?
GPT-5.4 Nano lists base rates of $0.20 per million input tokens and $1.25 per million output tokens. Estimate both input and output token volume and any additional charges for your workload. All amounts are USD per MTok. Standard: input/output $0.20/$1.25, cached input $0.02. Batch: input/output $0.10/$0.625, cached input $0.01. Flex: input/output $0.10/$0.625, cached input $0.01. Regional processing and FedRAMP add 10% where the model and route are eligible; region eligibility is separate from a quoted tariff. Server-side tools and their tokens can add charges.
What is GPT-5.4 Nano's context window?
GPT-5.4 Nano accepts about 400K tokens of context. That only matters if you routinely send very long documents, large codebases, or multi-turn histories that approach that limit.
What is GPT-5.4 Nano best for?
GPT-5.4 Nano is a budget tier from OpenAI. It suits classification, summarisation, high-volume chat. Deprecated October 1, 2026; migrate to GPT-6 Luna before the announced April 1, 2027 API shutdown. The current card still lists 400K context and 128K output, with no computer use or tool search. Do not transfer successor benchmark results or infer that the old API ID already routes elsewhere.
Model comparison catalogBenchmark library