OpenAI: GPT-5

Text input File input Image input Text output
Author's Description

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. Note that BYOK is required for this model. Set up here: https://openrouter.ai/settings/integrations

Key Specifications
Cost
$$$$$
Context
400K
Released
Aug 07, 2025
Supported Parameters

This model supports the following parameters:

Tool Choice Include Reasoning Reasoning Response Format Structured Outputs Tools Seed Max Tokens
Features

This model supports the following features:

Tools Reasoning Structured Outputs Response Format
Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $1.25
Completion $10
Input Cache Read $0.125

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
OpenAI
OpenAI | openai/gpt-5-2025-08-07 400K $1.25 / 1M tokens $10 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Free Executions Accuracy Cost Duration
Other Models by openai