Models / OpenAI
GPT-5.1-Codex
by OpenAI ·
openai/gpt-5.1-codexGPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
reasoningtool-usevisionreleased 2025-11-13
Legal score · raw
-
not yet benchmarked
Context
400K
max output 128K
Input
$1.56
per 1M tokens
Output
$12.50
per 1M tokens
Suite cost
-
no run recorded
Prompt caching
Grounded answers re-send the same retrieved authority every turn, so a cached read is what a long matter actually costs. Prices are per 1M tokens, from the provider’s own catalog.
Cache read
$0.16
9.6x cheaper than uncached
Uncached input
$1.56
per 1M tokens
Capabilities
Modalities
in textimage
out text
Request parameters it accepts
include_reasoningmax_completion_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity
Benchmark results
This model has not been run through the suite yet. See Humanity's Last Lawsuit for the benchmark models are ranked on.