Today's price · per 1M tokens
Input
$1.75
per 1M tokens
Output
$14.00
per 1M tokens
Blended
$7.88
avg of input & output $/1M
Cached input
$0.175
10% of input — prompt caching
Overview
Chat-tuned GPT-5.3 for conversational and general-purpose use. 128K context, multimodal input.
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is betterWe hold no per-benchmark accuracy scores for this model yet, so it has no accuracy average. That is a gap in our coverage, not a sign the model is untested — independent evaluators often publish a composite index for a new model long before releasing its per-benchmark numbers. The percentile above is its standing across the independent composites below.
- LMSYS Chatbot Arena: 1448.7 ELO (Human preference)
- Ranks #30 of 133 comparably-measured models by percentile score, across 1 independent measurement
- Ranks #105 of 133 comparably-tested models by normalized performance per dollar
Source: LMSYS Chatbot Arena (UC Berkeley) · updated Jul 18, 2026 · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 128K tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Mar 3, 2026
- Status
- Current
- Last updated
- Jul 3, 2026
- Tags
Availability verified: Jul 3, 2026 — listed on OpenAI's own page