GPT-5.1-Codex
by OpenAItext+image->text1 endpoint
Neura Intelligence Index
69.0/ 100
Rank
#91—
Confidence
lowBenchmarks
1(3% coverage)
Overview
GPT-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....
Capabilities
Text generation
Image understanding
Tool use / Function calling
Structured output
Extended reasoning
Prompt caching
Long context
Deterministic seed
Modalities
Input
TextImage
Output
Text
Technical Specifications
Context Window
400K tokens
Max Output
128K tokens
Tokenizer
GPT
Uptime (24h)
10000.0%
Country
🇺🇸US
Release Date
November 19, 202510mo
Supported Parameters
include_reasoningmax_completion_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Performance Over Time
Pricing
Per 1M tokens
Input$1.25
Output$10.00
Cache read$0.13
Added
November 13, 2025
Last synced 9/16/2026