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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....
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Blended
$3.44
per 1M tokens
Cheaper than 18% of models. Median price is $0.56/1M tokens.
Daily
$3.44
Monthly
$103.13
170
tokens/sec
Faster than 85% of models
4.47
seconds
Faster than 17% of models
4.47
seconds
Faster than 46% of models
Market Median
86 tok/s
97% faster
Median TTFT
1.07s
317% slower
Throughput/Dollar
49
tok/s per $/1M
Speed Comparison
Context Window
400K
tokens
Larger than 79% of models
Max Output
128K
tokens
32% of context
Quality Index
43.1
52nd of 507
Top 10%
Coding Index
36.6
68th of 417
Top 16%
Math Index
95.7
7th of 269
Top 3%
Price/1M
$3.44
513th cheapest
514% above median
Top 82%
Speed
170 tok/s
Top 15%
TTFT
4.47s
Context Window
400K
68th largest
Top 21%