GPT 5.1 Codex Mini
GPT 5.1 Codex Mini is the lightweight, fast variant in the GPT-5.1 codex family, optimized for routine coding tasks like bug fixes, feature scaffolding, and test generation at a cost that scales to high-frequency CI and development workflows. Your use is subject to OpenAI's Terms & Privacy Policies.
File InputImplicit CachingReasoningTool UseVision (Image)Web Search
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-codex-mini', prompt: 'Why is the sky blue?'})Copy link to headingMore models by OpenAI
| Model |
|---|
| 1.1M | 1.9s | 173tps | $0.20/MFast $0.40/M+1 more | $1.20/MFast $2.40/M+1 more | Read: $0.02/M+1 more Write: $0.25/M+1 more | $10/K + input costs | +4 |    | 07/09/2026 | |||||
| 1.1M | 2.3s | 139tps | $4/M$2/M Fast $4/M+1 more | $20/M$10/M Fast $20/M+1 more | Read: $0.40/M$0.20/M+1 more Write: $5/M$2.50/M+1 more | $10/K + input costs | +4 | | 07/09/2026 | |||||
| 1.1M | 2.2s | 118tps | $2/MFast $4/M+1 more | $12/MFast $24/M+1 more | Read: $0.20/M+1 more Write: $2.50/M+1 more | $10/K + input costs | +4 | | 07/09/2026 | |||||
| 1M | 0.5s | 102tps | $5/MFast $12.50/M+1 more | $30/MFast $75/M+1 more | Read: $0.50/M+1 more Write: — | $10/K + input costs | +4 | | 04/24/2026 | |||||
| 400K | 1.2s | 216tps | $0.75/MFast $1.50/M | $4.50/MFast $9/M | Read:$0.08/M Write:— | $10/K + input costs | +4 | | 03/17/2026 | |||||
| 400K | 4.2s | 236tps | $0.05/M | $0.40/M | Read:$0.005/M Write:— | $14/K + input costs | +3 | | 08/07/2025 |