Today's price · per 1M tokens
Input
$10.00
per 1M tokens
Output
$50.00
per 1M tokens
Blended
$20.00
blended $/1M — 3:1 weighted input:output
Cached input
$1.00
10% of input — prompt caching
How this price is scoped: OpenAI's rate card prices this model by context length: the tracked figure is the short-context tier, and prompts over 272K input tokens bill at the long-context tier of $20 input / $2 cached input / $25 cache write / $75 output per 1M tokens — 2x input and cache rates and 1.5x output, applied to the full request. Cache writes bill at 1.25x the uncached input rate. Batch and Flex are 50% of Standard; Fast mode is 2x the applicable rate, and Fast is unavailable with EU data residency.
Price receipt
We read OpenAI's own pricing page on and found gpt-6-astra 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 d636906eb6.
Overview
OpenAI's most capable model, released 2026-09-03 and positioned above the GPT-5.6 Sol/Terra/Luna tiers for the hardest end-to-end work: complex reasoning, coding, computer use, research and document creation. 1.05M context window, 922K max input, 128K max output, text + image input, text output, April 2026 knowledge cutoff. $10/$50 per 1M tokens (cached input $1.00). Supports reasoning effort levels low through max, but not the none level, and does not accept custom temperature, top_p or logprobs. Tool calling requires the Responses API.
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 52.7 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA-Omniscience Index: 43.4 (−100–100)
- GDPval-AA v2: 1572.8 ELO (Real-world work tasks, human baseline = 1000)
- LMSYS Chatbot Arena: 1477.3 ELO (Human preference)
- Ranks #5 of 101 benchmarked models by average score
- Ranks #6 of 195 comparably-measured models by percentile score, across 8 independent measurements
- Ranks #186 of 195 comparably-tested models by normalized performance per dollar
- Strongest at ARC-AGI 2 — 95%, #1 of 44
Source: Vellum LLM Leaderboard · updated · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 1M tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Current
- Last updated
- Tags
Availability verified: — listed on OpenAI's own page