Is GPT-6 Astra or GPT-5.6 Sol cheaper?

GPT-5.6 Sol is cheaper for a typical request of 1,000 input and 500 output tokens: $0.02 versus $0.035 for GPT-6 Astra, about 43% less.

What are the per-token prices of GPT-6 Astra and GPT-5.6 Sol?

GPT-6 Astra costs $10.00 input and $50.00 output per million tokens. GPT-5.6 Sol costs $5.00 input and $30.00 output per million tokens.

Which has the larger context window, GPT-6 Astra or GPT-5.6 Sol?

Both accept 1.05M tokens of context.

OpenAI vs OpenAI

GPT-6 Astra vs GPT-5.6 Sol: pricing comparison

GPT-5.6 Sol costs 43% less than GPT-6 Astra for a typical 1,000-input, 500-output request. Here is how the two compare on price, context and discounts.

Prices last updated: September 25, 2026

	GPT-6 Astra	GPT-5.6 Sol
Provider	OpenAI	OpenAI
Input per 1M tokens	$10.00	$5.00
Output per 1M tokens	$50.00	$30.00
Context window	1.05M	1.05M
Batch discount	50% off	50% off
Typical request (1,000 in / 500 out)	$0.035	$0.02
Monthly at 1,000 requests/day	$1,050.00	$600.00

GPT-6 Astra: OpenAI's flagship model, released September 2026.

GPT-5.6 Sol: Inputs above 272K tokens are billed at a higher long-context rate ($10 / $45).

Compare with your own numbers

Input tokens

Output tokens

Requests / day

GPT-6 Astra per request: $0.035
Per month: $1,050.00

GPT-5.6 Sol per request: $0.02
Per month: $600.00

Cost by task

Cost per 1,000 requests at standard prices.
Task	Tokens (in / out)	GPT-6 Astra	GPT-5.6 Sol
Short chat reply	500 / 300	$20.00	$11.50
RAG answer	6,000 / 600	$90.00	$48.00
Summarize a long document	12,000 / 1,000	$170.00	$90.00
Output-heavy generation	1,000 / 4,000	$210.00	$125.00

Output tokens usually dominate the bill — see input vs output token cost.

Frequently asked questions

Is GPT-6 Astra or GPT-5.6 Sol cheaper?: GPT-5.6 Sol is cheaper for a typical request of 1,000 input and 500 output tokens: $0.02 versus $0.035 for GPT-6 Astra, about 43% less.
What are the per-token prices of GPT-6 Astra and GPT-5.6 Sol?: GPT-6 Astra costs $10.00 input and $50.00 output per million tokens. GPT-5.6 Sol costs $5.00 input and $30.00 output per million tokens.
Which has the larger context window, GPT-6 Astra or GPT-5.6 Sol?: Both accept 1.05M tokens of context.

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