Today's price · per 1M tokens
Input
$1.75
per 1M tokens
Output
$14.00
per 1M tokens
Blended
$4.81
blended $/1M — 3:1 weighted input:output
Cached input
$0.175
10% of input — prompt caching
Price receipt
We read OpenAI's own pricing page on and found GPT-5.3-Codex listed with a price on the same row — that read is where the number above comes from. We keep the page text we read; its content hash is 0486ff521e.
Overview
GPT-5.3 optimized for agentic coding and software engineering. 400K context.
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 44.3 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- LMSYS Chatbot Arena: 1416 ELO (Human preference)
- Ranks #34 of 84 benchmarked models by average score
- Ranks #79 of 181 comparably-measured models by percentile score, across 4 independent measurements
- Ranks #152 of 181 comparably-tested models by normalized performance per dollar
- Strongest at Terminal-Bench 2.1 — 77.3%, #18 of 41
50 tokens/sec output 0.003s latency to first token (TTFT)
Source: Vellum LLM Leaderboard · updated · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 400K tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Current
- Last updated
- Tags
Availability verified: — listed on OpenAI's own page