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GPT 5.4

GPT 5.4 is the standard tier of the GPT-5.4 model family, extending the agentic and reasoning capabilities of GPT-5.3 Codex to all domains including knowledge work, multi-step workflows, and analysis.

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Input and output price
Prices from: Input $2.50, Output $15, Per 1M tokens
24h uptime
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import { streamText } from 'ai'
const result = streamText({
model: 'openai/gpt-5.4',
prompt: 'Why is the sky blue?'
})
Read docs

Copy link to headingPlayground

Try out GPT 5.4 by OpenAI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.

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GPT 5.4

Copy link to headingProviders

Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.

Provider
Context
Max Output
Latency
Throughput
Input
Output
Cache
Web Search
Capabilities
ZDR
No Training
Regional Inference
Free Tier
Release Date
1.1M128K2.2 s86 tps
$2.50/M+4 more
$15/M+4 more
Read$0.25/M
$10/K
+4
US
03/05/2026
1M128K0.6 s85 tps
$2.50/M+1 more
$15/M+1 more
Read$0.25/M
$14/K
+3
03/05/2026

Copy link to headingUptime

Direct request success rate on AI Gateway and per-provider. Visit the docs for more info.

Copy link to headingThroughput

P50 throughput on live AI Gateway traffic, in tokens per second (TPS). Visit the docs for more info.

Copy link to headingLatency

P50 time to first token (TTFT) on live AI Gateway traffic, in milliseconds. View the docs for more info.

Getting started

Call GPT 5.4 through AI Gateway with the AI SDK generateText and streamText functions, or through the OpenAI Chat Completions, OpenAI Responses, and Anthropic Messages APIs by changing the base URL. AI Gateway authenticates the request and routes it to an available provider.

Install the AI SDK (pnpm add ai dotenv), create an API key from the API Keys page, and set it as AI_GATEWAY_API_KEY in your environment. Full setup is covered in the text generation quickstart.

index.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
prompt: 'Why is the sky blue?',
});
console.log(result.text);
}
main().catch(console.error);

Top-level parameters

The same GPT 5.4 request in each API format AI Gateway supports.

top-level-params.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
system: 'You are a concise technical assistant.',
prompt: 'Summarize the tradeoffs between static generation and SSR.',
maxOutputTokens: 1024,
});
console.log(result.text);
}
main().catch(console.error);

Standard parameters like prompt, messages, temperature, and tools work as documented in the AI SDK docs. These are the parameters with model-specific behavior.

ParameterTypeRequiredDescription
modelstringYesModel ID in the form creator/model, e.g. openai/gpt-5.4. AI Gateway routes the request to an available provider.
maxOutputTokensnumberNoHard cap on generated tokens. GPT 5.4 supports up to 128,000 output tokens. Reasoning tokens count toward this limit.
reasoning'provider-default' | 'none' | 'minimal' | 'low' | 'medium' | 'high' | 'xhigh'NoProvider-agnostic reasoning effort, available in AI SDK 7 or later. Maps to the provider’s native reasoning configuration; reasoning settings under providerOptions take precedence when both are set. See the Reasoning section below.
providerOptionsRecord<string, JSONValue>NoAI Gateway routing options under gateway, plus any provider-native options under the provider’s own namespace — see the table below.

Input limits

InputFormatsSourcesMax countMax sizeLimits
TextPrompt and response share the 1.1M-token context window
ImageURL, base64, Uint8ArraySent as image parts in messages; counts as input tokens
PDFURL, base64, Uint8ArraySent as file parts in messages; counts as input tokens

Provider options

Set AI Gateway routing options under providerOptions.gateway. For provider-specific options, pass them under the provider’s namespace as documented by the AI SDK.

Learn more in the AI SDK openai provider docs.

provider-options.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
prompt: 'Why is the sky blue?',
providerOptions: {
gateway: {
only: ['openai', 'azure'],
},
},
});
console.log(result.text);
}
main().catch(console.error);

These AI Gateway routing options apply to every model. Provider-specific options pass through under the provider’s own namespace (for example providerOptions.anthropic) exactly as documented by the AI SDK.

ParameterTypeRequiredDescription
providerOptions.gateway.onlystring[]NoRestrict routing to these provider slugs. Requests fail over only within the listed providers.
providerOptions.gateway.orderstring[]NoPreferred provider order. Listed providers are tried first; unlisted providers remain available as fallbacks.
providerOptions.gateway.sort'cost' | 'ttft' | 'tps'NoRank candidate providers by price, time to first token, or tokens per second instead of the default routing order.
providerOptions.gateway.zeroDataRetentionbooleanNoRoute only to providers with a zero-data-retention policy for this model.

Routing across providers

AI Gateway serves the same model through multiple providers and fails over automatically. order expresses a preference while keeping every provider eligible; only is a hard allowlist — if none of the listed providers are available the request fails instead of falling back.

Options under a provider's own namespace (for example providerOptions.anthropic) are forwarded to that provider with the request. Providers ignore option namespaces that don't apply to them, so it is safe to set provider options alongside gateway routing options.

Reasoning

AI Gateway bridges reasoning across every API format. The AI SDK exposes a provider-agnostic top-level reasoning level (none, minimal, low, medium, high, or xhigh); the Chat Completions and Responses formats take the same effort under reasoning.effort; and the Anthropic Messages format uses a native thinking token budget. Whichever you send, the gateway maps it to the target model’s native configuration, converting between effort levels and token budgets as needed. Reasoning-related settings under providerOptions take full precedence over the top-level reasoning value and are never merged. Reasoning tokens typically count toward your output-token usage, though how they’re reported and billed varies by provider.

Learn more in the AI Gateway reasoning guide.

reasoning.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
prompt: 'Explain the Monty Hall problem step by step.',
reasoning: 'high',
});
console.log(result.text);
}
main().catch(console.error);

Image input

Send images alongside text as message parts. Images count as input tokens.

image-input.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
messages: [
{
role: 'user',
content: [
{ type: 'text', text: 'Describe this image.' },
{ type: 'image', image: 'https://example.com/photo.jpg' },
],
},
],
});
console.log(result.text);
}
main().catch(console.error);

PDF input

Attach PDFs as file parts. Their contents count as input tokens.

pdf-input.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
messages: [
{
role: 'user',
content: [
{ type: 'text', text: 'Summarize this document.' },
{
type: 'file',
mediaType: 'application/pdf',
data: 'https://example.com/document.pdf',
},
],
},
],
});
console.log(result.text);
}
main().catch(console.error);

Tool calling

Expose tools the model can call. Define each tool’s inputs with a Zod schema.

tool-calling.ts
import { generateText, tool } from 'ai';
import { z } from 'zod';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4',
prompt: 'What is the weather in San Francisco?',
tools: {
getWeather: tool({
description: 'Get the current weather for a location',
inputSchema: z.object({ location: z.string() }),
execute: async ({ location }) => ({ location, temperatureC: 18 }),
}),
},
});
console.log(result.text);
}
main().catch(console.error);

Fast mode

GPT 5.4 can run in fast mode for lower latency by appending -fast to the model ID.

fast-mode.ts
import { generateText } from 'ai';
import 'dotenv/config';
async function main() {
const result = await generateText({
model: 'openai/gpt-5.4-fast',
prompt: 'Why is the sky blue?',
});
console.log(result.text);
}
main().catch(console.error);

Copy link to headingMore models by OpenAI

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GPT 5.4 became available on March 5, 2026 on AI Gateway as the standard tier of the GPT-5.4 model family. It extends the agentic and reasoning leaps introduced in GPT-5.3 Codex to all domains, including knowledge work like reports, spreadsheets, presentations, and analysis.

The model handles complex multi-step workflows more reliably than previous generations, including tasks that involve tools, research, and pulling from multiple sources. It's faster and more token-efficient than GPT-5.2, delivering better results at lower cost per task.

With the context window of 1.1M tokens and the full API feature set, GPT 5.4 supports text, image, and mixed-modality inputs. If you're starting a new project or upgrading from an earlier GPT-5.x model, it's the default starting point for general-purpose work.

Copy link to headingWhat To Consider When Choosing a Provider

  • Configuration: GPT 5.4 brings the agentic and reasoning leaps from GPT-5.3 Codex into all domains, not just coding.
  • Configuration: It's faster and more token-efficient than GPT-5.2, meaning lower costs and shorter latencies on comparable tasks.
  • Zero Data Retention: Zero Data Retention is available for this model. It is offered on a per-provider and model basis. See the documentation for details.
  • Authentication: AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.

Copy link to headingWhen to Use GPT 5.4

Best for

  • Complex multi-step workflows: Tasks involving tools, research, and pulling from multiple sources
  • Knowledge work: Reports, spreadsheets, presentations, and analysis across business domains
  • Advanced code generation: Strong coding performance with GPT-5.4 generation reasoning improvements
  • Agentic applications: Autonomous agents that coordinate tools, research, and multi-source workflows
  • General-purpose AI: New projects that benefit from GPT-5.4 generation capability

Consider alternatives when

  • Cost optimization: GPT-5.4 mini for production workloads where cost efficiency matters
  • High-volume lightweight tasks: GPT-5.4 nano for classification, routing, and sub-agent workflows
  • Extended reasoning: GPT-5.4 pro for maximum performance on the most complex tasks
  • Pure chain-of-thought: O3 for mathematical and scientific reasoning tasks

GPT 5.4 brings agentic reasoning to all domains with improved speed and efficiency over GPT-5.2, available through AI Gateway. It is the standard tier of the GPT-5.4 family.

Copy link to headingFrequently Asked Questions

  • How does GPT 5.4 improve over GPT-5.2?

    It extends the agentic and reasoning leaps from GPT-5.3 Codex to all domains. It's also faster and more token-efficient, reducing cost per task.

  • What context window does GPT 5.4 support?

    1.1M tokens, supporting extensive document and codebase processing.

  • What types of workflows does GPT 5.4 handle well?

    Complex multi-step workflows involving tools, research, and pulling from multiple sources. It also handles knowledge work like reports, presentations, and analysis.

  • Does GPT 5.4 support function calling and structured outputs?

    Yes. It supports the full API feature set including function calling, structured outputs, vision, and system messages.

  • Should I migrate from GPT-5.2?

    If your application benefits from improved agentic reasoning and you want better speed and token efficiency, yes. Test with your specific workloads to confirm the improvement.

  • How does AI Gateway handle authentication for GPT 5.4?

    AI Gateway accepts a single API key or OIDC token for all requests. You don't embed OpenAI credentials in your application; AI Gateway routes and authenticates on your behalf.

  • What are typical latency characteristics?

    This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic.

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