OpenAI: GPT-5.1-Codex-Max

Pricing, context window and lifecycle for openai/gpt-5.1-codex-max, tracked from what the vendor publishes.

2026-07-23 - its vendor retired this model on that date, and the catalogue still lists it. Anything still calling it is running on borrowed time.

To find every place that calls it:

curl -sO https://neosignal-ai.vercel.app/check.py
python check.py .

It names every model your repository calls that is already gone, and exits non-zero so the next one fails the build instead of production.

Price per million tokens

Facts

Supported parameters

include_reasoning, max_completion_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools

Other OpenAI models

• openai/gpt-3.5-turbo $0.500 in / $1.50 out
• openai/gpt-3.5-turbo-0613 $1.00 in / $2.00 out
• openai/gpt-3.5-turbo-16k $3.00 in / $4.00 out
• openai/gpt-3.5-turbo-instruct $1.50 in / $2.00 out
• openai/gpt-4 $30.00 in / $60.00 out
• openai/gpt-4-turbo $10.00 in / $30.00 out
• openai/gpt-4-turbo-preview $10.00 in / $30.00 out
• openai/gpt-4.1 $2.00 in / $8.00 out
• openai/gpt-4.1-mini $0.400 in / $1.60 out
• openai/gpt-4.1-nano $0.100 in / $0.400 out

Change history

Every change we have observed since tracking began.