About
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Related Models
Pricing
Input
$1.75
per 1M tokens
Output
$14.00
per 1M tokens
Blended
$4.81
per 1M tokens
Cheaper than 11% of models. Median price is $0.54/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$4.81
Monthly
$144.38
vs. Similar Models
DeepSeek: DeepSeek V4 ProQ:0.0
$0.54-89%
MiniMax: MiniMax M3Q:+0.1
$0.52-89%
Claude Opus 4.6 (Adaptive Reasoning, Max Effort)Q:-0.6
$10.00+108%
GPT-5.5 (low)Q:-0.8
$11.25+134%
Performance
100
tokens/sec
Faster than 53% of models
52.10
seconds
Faster than 2% of models
52.10
seconds
Faster than 6% of models
Market Median
94 tok/s
6% faster
Median TTFT
1.11s
4581% slower
Throughput/Dollar
21
tok/s per $/1M
Speed Comparison
OpenAI: GPT-5
99 tok/s-1%
Meta: Llama 4 Maverick
100 tok/s+1%
GPT-5 mini (minimal)
101 tok/s+2%
Context Window
400K
tokens
Larger than 76% of models
Max Output
128K
tokens
32% of context
Benchmarks
MMLU-ProNot evaluated
GPQA Diamond
91.5%
HLE
39.9%
LiveCodeBenchNot evaluated
SciCode
53.2%
TerminalBench Hard
53.0%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025Not evaluated
IFBench
75.4%
Long Context Recall
74.0%
Tau2
86.0%
Market AverageTop Score