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GPT-6 Astra

OpenAI · released 5 Sep 2026 · proprietary API

OpenAI's most capable model: complex reasoning, coding, computer use, research, and document creation.

Context window

1.05M

1,050,000 tokens

Input price

$10

per 1M tokens

Output price

$50

per 1M tokens

Blended

$20

3:1 in:out mix

Weights

Proprietary

API only

Released

5 Sep 2026

OpenAI

Long-context / tier pricing — >272K input reprices the FULL request at 2x input / 1.5x output ($20 in / $75 out per 1M); cached input $1/1M and cache writes $12.50/1M (1.25x uncached input); Batch and Flex 50% of standard, Fast mode 2x; max input is 922K of the 1,050K window. Listed prices are the base rate for prompts up to ~200K tokens.

Where it ranks

Of 27 models tracked.

Cost to run

#25(tied)

of 27

Input price

#25(tied)

of 27

Context window

#1(tied)

of 27

See the full Frontier Index →

Compare with

The nearest models by blended cost to run.

Put it to work

Specs from BitByteCore's hand-verified Frontier Ledger (v2026-09-05), this row verified 5 Sep 2026 against OpenAI's official pricing ↗. Model pricing moves fast, so confirm with OpenAI before you rely on a figure.