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GPT-5

API OnlyChat & ReasoningtextUpdated July 14, 2026

Model Overview

GPT-5 (gpt-5) is an intelligent reasoning model from OpenAI, officially released on August 7, 2025. It was designed as a unified system replacing previous models like GPT-4o, and offering advanced reasoning, multimodal inputs (text, voice, vision), and task execution. As of July 2026, GPT-5 is no longer the latest frontier model, having been succeeded by the GPT-5.6 series (Sol, Terra, and Luna).

Capabilities

  • Advanced Reasoning: Designed for complex coding, scientific analysis, and agentic tasks.
  • Real-Time Router: Automatically manages query complexity by switching between "Fast" modes for routine tasks and "Thinking" modes for complex, multi-step reasoning.
  • Configurable Intelligence: Features distinct cost tiers including GPT-5 mini (for cost-sensitive workloads), GPT-5 nano (fastest and most cost-efficient), and GPT-5 Pro (for maximum precision and intelligence).

Example Use Cases

  • Agentic Workflows: Autonomous task execution requiring deep reasoning and planning.
  • Software Engineering: Advanced code generation, debugging, and architectural design.
  • Scientific Research: Analyzing complex data and synthesizing information for professional use cases.

Performance & Benchmarks

At its launch, GPT-5 represented a significant leap over the GPT-4 family. While specific benchmark details (like exact parameter count and context window) are not publicly detailed in its metadata, the model was renowned for its adaptive reasoning capabilities.

Intended Use & Limitations

  • Intended Use: Targeted at professional, agentic work where deep reasoning and high intelligence are required.
  • Limitations: It is no longer the state-of-the-art model; users seeking the most current capabilities for frontier-level performance are now directed by OpenAI to the GPT-5.6 series.

About OpenAI

OpenAI is an AI research and deployment company dedicated to ensuring that artificial general intelligence benefits all of humanity.

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Verified Sources

Model Specs

api-only

Parameters

Unknown

Context Window

Unknown

License

Proprietary

Deployment

api-only

Cost Tiers

GPT-5 mini
GPT-5 nano
GPT-5 Pro

Resources & Links

Lineage

Model Family

Part of the gpt-5 family

Curator Notes

Bulk imported from OpenAI developer docs.

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