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Favicon for openai

OpenAI: GPT-5.4

openai/gpt-5.4

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GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling high-context reasoning, coding, and multimodal analysis within the same workflow.

The model delivers improved performance in coding, document understanding, tool use, and instruction following. It is designed as a strong default for both general-purpose tasks and software engineering, capable of generating production-quality code, synthesizing information across multiple sources, and executing complex multi-step workflows with fewer iterations and greater token efficiency.

Modalities
In / Out Price
$2.50 / $15per 1M
Context
1.1M
Released
Mar 5, 2026
Compare
ProvidersPricingPerformanceUptimeBenchmarksAppsActivityDocumentationFAQExplore

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), Floor (cheapest), or Exacto (highest tool-calling accuracy).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for OpenAI: GPT-5.4 (Artificial Analysis and Design Arena)
SourceBenchmarkScore
Artificial AnalysisGPT-5.4 (low) GPQA Diamond87.1%
Artificial AnalysisGPT-5.4 (low) HLE30.8%
Artificial AnalysisGPT-5.4 (low) IFBench65.9%
Artificial AnalysisGPT-5.4 (low) τ²-Bench Telecom74.6%
Artificial AnalysisGPT-5.4 (low) AA-LCR76.7%
Artificial AnalysisGPT-5.4 (low) CritPt7.4%
Artificial AnalysisGPT-5.4 (low) Terminal-Bench Hard43.2%
Artificial AnalysisGPT-5.4 (low) AA-Omniscience Accuracy47.8%
Artificial AnalysisGPT-5.4 (low) AA-Omniscience Non-Hallucination Rate17.4%
Artificial AnalysisGPT-5.4 (xhigh) Coding Index71.1
Artificial AnalysisGPT-5.4 (xhigh) GPQA Diamond92.0%
Artificial AnalysisGPT-5.4 (xhigh) HLE43.7%
Artificial AnalysisGPT-5.4 (xhigh) IFBench73.9%
Artificial AnalysisGPT-5.4 (xhigh) τ²-Bench Telecom87.1%
Artificial AnalysisGPT-5.4 (xhigh) AA-LCR82.0%
Artificial AnalysisGPT-5.4 (xhigh) GDPval-AA36.6%
Artificial AnalysisGPT-5.4 (xhigh) CritPt23.4%
Artificial AnalysisGPT-5.4 (xhigh) Terminal-Bench Hard57.6%
Artificial AnalysisGPT-5.4 (xhigh) AA-Omniscience Accuracy50.8%
Artificial AnalysisGPT-5.4 (xhigh) AA-Omniscience Non-Hallucination Rate8.3%
Artificial AnalysisGPT-5.4 (Non-reasoning) GPQA Diamond74.8%
Artificial AnalysisGPT-5.4 (Non-reasoning) HLE11.3%
Artificial AnalysisGPT-5.4 (Non-reasoning) IFBench48.4%
Artificial AnalysisGPT-5.4 (Non-reasoning) τ²-Bench Telecom36.0%
Artificial AnalysisGPT-5.4 (Non-reasoning) AA-LCR58.3%
Artificial AnalysisGPT-5.4 (Non-reasoning) CritPt0.6%
Artificial AnalysisGPT-5.4 (Non-reasoning) Terminal-Bench Hard37.9%
Artificial AnalysisGPT-5.4 (Non-reasoning) AA-Omniscience Accuracy37.4%
Artificial AnalysisGPT-5.4 (Non-reasoning) AA-Omniscience Non-Hallucination Rate15.3%
Design ArenaGPT-5.4 (Medium) Models Arena 3D Elo1120
Design ArenaGPT-5.4 (Medium) Models Arena Asciiart Elo1210
Design ArenaGPT-5.4 (Medium) Models Arena Code Categories Elo1219
Design ArenaGPT-5.4 (Medium) Models Arena Data Visualization Elo1244
Design ArenaGPT-5.4 (Medium) Models Arena Game Development Elo1252
Design ArenaGPT-5.4 (Medium) Models Arena SVG Elo1193
Design ArenaGPT-5.4 (Medium) Models Arena UI Component Elo1250
Design ArenaGPT-5.4 (Medium) Models Arena Website Elo1223

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Documentation

Guides, cookbooks, and tools for building with OpenAI: GPT-5.4 on OpenRouter.

  • GPT-5.4 Migration GuideCookbook

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$2.50$15.00$0.2501.74s36 tps
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100.00%
Not used in Standard routing:Why these endpoints are not used
Flex
$1.25$7.50$0.12512.14s15 tps
85.30%
$2.75$16.50$0.275----
100.00%
$2.75$16.50$0.2750.63s19 tps
100.00%
$2.75$16.50$0.2751.50s38 tps
--
Fast
$5.00$30.00$0.5001.65s94 tps
100.00%
Throughput
94tok/s

P50, best across providers

Latency
0.63s

P50, best provider

AutoExacto benchmarks
GPQA DiamondTAU-Benchauto-routing90.2%75.3%Azure (EU)89.7%74.7%Amazon Bedrock90.4%73.3%Azure90.1%73.3%OpenAI90.7%71.3%Azure (US)90.4%71.3%
Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.88%

Availability over the last 3 days

Last 72 hours
Availability 99.88%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.89%
Without Routing
98.55%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

1.
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Hermes Agent
Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.
10.4Btokens
2.
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Codex
A coding agent that helps you build and ship with AI
6.46Btokens
3.
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Lumea CRM
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5.53Btokens
4.
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OpenClaw
OpenClaw is an open-source AI agent that connects to your messaging apps and takes real actions on your behalf, from running commands and browsing the web to managing files and sending emails.
4.86Btokens
5.
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CoChat
new
3.6Btokens

Frequently asked questions

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling high-context reasoning, coding, and multimodal analysis within the same workflow.

The GPT-5.4 documentation on OpenRouter includes the GPT-5.4 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

GPT-5.4 costs $2.50/M input tokens and $15.00/M output tokens, with separate rates for Cache Read at $0.25/M tokens.

GPT-5.4 has a 1,050,000 token context window. It supports up to 128,000 completion tokens.

Yes. GPT-5.4 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

GPT-5.4 accepts text, images, and files such as PDFs as input and returns text.

GPT-5.4 is served by 3 providers on OpenRouter: OpenAI, Azure, and Amazon Bedrock. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

GPT-5.4 was released on March 5, 2026.

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