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GPT-5 Codex (high)
New in 2026
Developed by
OpenAI
API Pricing (per 1M tokens)
Input
$1.25
Output
$10.00
Intelligence Benchmarks
MMLU Pro
86.5%
GPQA
83.7%
Intelligence Index
44.5
Livebench
N/A
Technical Specifications
Context Window
400K Tokens
Vision Support
Yes
Tokens per Second
305
Time to First Token (s)
12.34
Modalities
text
image
file->text
GPT-5 Codex (high) Pricing, Context Window, and Benchmarks 2026