Model Details
Released
Nov 2025
Status
Active
Context Length
400K
Max Output
128K
Provider
OpenAI
Where is gpt-5.1-codex a perfect fit?
Where is GPT-5.1 Codex a perfect fit?
- Long-running, autonomous coding agents and workflows
- Continuous code review and refactoring in large repositories
- Automated test generation, CI/CD integration, and pull-request suggestions
- Interactive development in terminal or IDE via Codex CLI or extension
- Coding tasks where the model needs to think deeply, plan, and iterate over hours
- Long-running, autonomous coding agents and workflows
- Continuous code review and refactoring in large repositories
- Automated test generation, CI/CD integration, and pull-request suggestions
- Interactive development in terminal or IDE via Codex CLI or extension
- Coding tasks where the model needs to think deeply, plan, and iterate over hours
Quick Model Estimate
Your GPT-5 Cost Estimate
💰 Total Cost
USD 3.00
for 1000 input + 1000 output tokens
📥 Input (1000 × $2.500000)
USD 1.5000
📤 Output (1000 × $20.000000)
USD 1.5000
Cost Breakdown
📥 Input 50%
📤 Output 50%
Prices updated daily from official provider data.
Pricing
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 OpenAI
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Text | $2.5000 | $20.0000 | 400,000 tokens | 2025-12-03 | → |
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OpenAI
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Text | $1.2500 | $10.0000 | 400,000 tokens | 2025-11-18 | → |