gpt-5.1-codex

Name: gpt-5.1-codex API
Brand: openai
Price: 0.875000 USD
Availability: InStock

GPT-5.1 · Per Token

gpt-5.1-codexAvailable⚡Cache 90% off

ChatVisionTool UsePrompt CacheJSON ModeContext Window: 272KMax Output Tokens: 128K

Pricing

	Official Price	LemonData Price
Input	$1.25	$0.875
Output	$10.00	$7.00
Cache Read	$0.125	$0.125

Parameters

Context Window

272K tokens

Max Output Tokens

128K tokens

Best For

Chat

Conversational AI, customer support, and Q&A

Vision

Image understanding, document analysis, and visual reasoning

Cost Calculator

Monthly Input Tokens1M

Monthly Output Tokens0.5M

Estimated Monthly Cost$4.38

API Code Example

POST/v1/responses

API Format:

curl https://api.lemondata.cc/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-xxx" \
  -d '{
    "model": "gpt-5.1-codex",
    "input": "Hello!"
  }'

FAQ

How much does gpt-5.1-codex cost?

On LemonData, gpt-5.1-codex costs $0.8750 per 1M input tokens and $7.0000 per 1M output tokens, which is up to 30% off the official pricing.

What is gpt-5.1-codex best for?

gpt-5.1-codex excels at Chat, Vision, Tool Use. Access it through LemonData's unified API with a single API key.

How to use gpt-5.1-codex API?

Get your API key from LemonData, then call https://api.lemondata.cc/v1/responses using any compatible SDK. See the code examples above for detailed integration.

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