Home Models OpenAI GPT-5 (400k)

OpenAI GPT-5 (400k)

OpenAI 400K context Released: 2025-08

Previous flagship GPT model for coding, reasoning, and agentic tasks. OpenAI recommends GPT-5.1/5.2 for newest improvements.

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Pricing Information

Input Pricing

Standard: $1.2500
Per 1,000 tokens
Cached: $0.1250
Per 1,000 tokens (cached requests)

Output Pricing

Standard: $10.0000
Per 1,000 tokens

Example Costs

Short Conversation
1K input + 500 output tokens
$6.2500
Book Analysis
50K input + 2K output tokens
$82.50

Token Calculator

Tokens: 0
Words: 0
Characters: 0
Input Cost: $0.00
Estimated based on current token count as input
Use our main calculator for more detailed estimates including input/output combinations.

Key Features

  • Text & vision
  • 400K token context window (128K max output)
  • Built-in minimal/variable reasoning
  • Strong tool use (search, code, images)

Common Use Cases

  • General AI assistants
  • Full-stack & frontend generation
  • Documentation & long-context QA
  • Data analysis & report writing

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Frequently Asked Questions

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