OpenAI: GPT-5

openai/gpt-5

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.

by OpenAI

Input type
Output type
Publish time
2025-08-07

Recent activity on GPT-5

Tokens processed per day

Throughput

(tokens/s)

Providers	Min (tokens/s)	Max (tokens/s)	Avg (tokens/s)
Azure	8.77	72.52	49.16

First Token Latency

(ms)

Providers	Min (ms)	Max (ms)	Avg (ms)
Azure	1735	29689	9452.07
OpenAI	590	590	590.00

Uptime stats for GPT-5

Uptime stats for GPT-5 across all providers

Providers	Uptime (Percent)
Azure	100.00
OpenAI	100.00

Pricing

Item	Price
Input	$ 1.25/ M tokens
Output	$ 10/ M tokens
Cache read	$ 0.125/ M tokens
Web search	$ 0.01/ counts

Model limitation

Limitation	Value
Context	400.00K
Max output	128.00K

Sample code and API for GPT-5

ZenMux normalizes requests and responses across providers for you.

from openai import OpenAI

client = OpenAI(
  base_url="https://zenmux.ai/api/v1",
  api_key="<ZENMUX_API_KEY>",
)

# Chat Completion
completion = client.chat.completions.create(
  model="openai/gpt-5",
  messages=[
    {
      "role": "user",
      "content": "What is the meaning of life?"
    }
  ]
)
print(completion.choices[0].message.content)

# Responses API
responses = client.responses.create(
  model="openai/gpt-5",
  input="What is the meaning of life?"
)
print(responses)