Today's price · per 1M tokens
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Blended
$3.44
blended $/1M — 3:1 weighted input:output
Cached input
$0.125
10% of input — prompt caching
Price receipt
We read OpenAI's own pricing page on and found gpt-5.1 listed with a price on the same row — that read is where the number above comes from, recorded as a new model. We keep the page text we read; its content hash is 0359f17f7e.
Overview
OpenAI's late-2025 flagship for coding and agentic tasks, with configurable reasoning and non-reasoning effort. 400K context window, 128K max output tokens, text + image input, text output, September 2024 knowledge cutoff. Superseded by the GPT-5.2 through GPT-5.6 lines but still sold first-party at its own rate, and the cheapest per-token flagship OpenAI currently lists.
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.
- AA-Omniscience Index: 5.4 (−100–100)
- LMSYS Chatbot Arena: 1439 ELO (Human preference)
- Ranks #52 of 194 comparably-measured models by percentile score, across 2 independent measurements
- Ranks #143 of 194 comparably-tested models by normalized performance per dollar
Source: Artificial Analysis, LMSYS Chatbot Arena (UC Berkeley) · 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