OpenAI

GPT-6 Astra

OpenAI's most capable flagship for complex reasoning, coding, computer use, research, and document creation. 1.05M context with tiered pricing above 272K input tokens; reasoning.effort supports low through max.

ActiveReleased September 3, 2026Knowledge cutoff April 30, 2026
Tool callingCan invoke external tools and APIs (function calling) mid-response.Structured outputCan return JSON or schema-constrained responses instead of free text.ReasoningUses extended thinking / chain-of-thought for harder multi-step problems.Effort controlLets you dial thinking depth (low / medium / high) to trade cost for quality.Fine-tuningSupports training a custom variant on your own data (vendor fine-tune API or self-hosted open weights).

Source: OpenAI GPT-6 Astra model page, OpenAI model guidance, OpenAI pricing, Prompt caching (1,024 minimum, 30m TTL), ChatGPT release notes (2026-09-03)

Price per 1M tokens
$10 in / $50 out
Context window1,050,000
Max output128,000
Cache read$1 / M
Min cache prefix1,024 tokens
Cache lifetime30 min
Batch discount-50%
Input
  • Text
  • Image
Output
  • Text

Pricing

Every billing leg from the live catalog, in USD per 1M tokens.

Billing legStandardLong contextBatch
Input$10 / M$20 / M$5 / M
Output$50 / M$75 / M$25 / M
Cache read$1 / M$2 / M$0.5 / M
Cache write$12.5 / M$25 / M$6.25 / M

Long-context rates apply above 272,000 input tokens.

Cost calculator

Billing-grade math over the rate card above, including the thinking tokens most estimates miss.

Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.

Estimated monthly cost
$5.0K
at current list prices
Fresh input$2.0K
Cached input$0.00
Output incl. thinking$3.0K
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Provider

Where this model runs, and what it charges.

PlatformInput / MOutput / MCache read / MBatchAccess
OpenAI
$10$50$1✓First-party API

Price history

Has this model gotten cheaper or more expensive?

No changePriced at $10 / $50 per 1M since September 3, 2026.

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Rates are generated from SuperPenguin's live pricing catalog.