GPT 5

gpt-5 · OpenAI

GPT-5 is OpenAI’s most advanced general-purpose model, delivering major improvements in reasoning, code quality, and overall user experience. It is optimized for complex tasks that require step-by-step reasoning, precise instruction following, and high accuracy in high-stakes scenarios. The model supports test-time routing and advanced prompt understanding, including user-specified intent such as “think hard about this,” while significantly reducing hallucination and sycophancy and improving performance in coding, writing, and health-related tasks.

API Pricing

Input$1.25 / 1M tokens
Output$10 / 1M tokens
Cache read$0.125 / 1M tokens

Specifications

Context400K tokens
Modalitiestext, image
CapabilitiesThinking, Streaming, Tool calling, Web search, Code interpreter, File search, Structured outputs, Prompt caching

Frequently asked questions

What is GPT 5?

GPT-5 is OpenAI’s most advanced general-purpose model, delivering major improvements in reasoning, code quality, and overall user experience. It is optimized for complex tasks that require step-by-step reasoning, precise instruction following, and high accuracy in high-stakes scenarios. The model supports test-time routing and advanced prompt understanding, including user-specified intent such as “think hard about this,” while significantly reducing hallucination and sycophancy and improving performance in coding, writing, and health-related tasks.

What is the context length of GPT 5?

GPT 5 has a 400,000 token context window.

How much does GPT 5 cost?

On AIHubMix, GPT 5 costs $1.25 per million input tokens and $10 per million output tokens. Cached input reads are billed at $0.125 per million tokens.

What modalities does GPT 5 support?

GPT 5 accepts text and image input.

What capabilities does GPT 5 support?

GPT 5 supports thinking, tool calling, function calling and structured outputs. Per-protocol parameter support is listed in the capability table on this page.

How do I call GPT 5 via API?

GPT 5 is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to gpt-5 — no other code changes needed.

Who created GPT 5?

GPT 5 is developed by OpenAI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.

When was GPT 5 released?

GPT 5 was released on August 7, 2025 by OpenAI.

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Use GPT 5 via the AIHubMix unified API — one interface for every major LLM.