OpenAI: GPT-5

openai/gpt-5

Released Aug 7, 2025400,000 context

$1.25/M input tokens$10/M output tokens$10/K web search

GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy in high-stakes use cases. It supports test-time routing features and advanced prompt understanding, including user-specified intent like "think hard about this." Improvements include reductions in hallucination, sycophancy, and better performance in coding, writing, and health-related tasks.

Providers for GPT-5

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for GPT-5

Compare different providers across OpenRouter

Effective Pricing for GPT-5

Actual cost per million tokens across providers over the past hour

Apps using GPT-5

Top public apps this month

Recent activity on GPT-5

Total usage per day on OpenRouter

Prompt

1.09B

Reasoning

182M

Completion

51.6M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for GPT-5

Uptime stats for GPT-5 across all providers

Sample code and API for GPT-5

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

GPT-5 - API Pricing & Providers | OpenRouter