GPT-6.1 Sol Pricing

Standard API prices per OpenAI's launch announcement (Sept 2026). Cached input is where Sol saves the most.

API prices per 1M tokens — OpenAI, Sept 2026
Model	Input / 1M	Output / 1M	Cached input / 1M
GPT-6 Astra	$10	$50	$1
GPT-6.1 Sol	$2	$10	$0.10
GPT-6 Luna	$0.10	$0.50	$0.01

Estimate your monthly cost

Enter your usage — prices per OpenAI’s Sept 2026 announcement. Verify on openai.com before buying. (Cached input only discounts the input side.)

Input tokens / month Output tokens / month Cached share of input: 50%

Sol's cached input is 95% cheaper than standard input and 50% cheaper than GPT-6 Sol's cached input — built for agents that reuse context.
An Ultrafast variant (up to 8× faster generation in Codex) was announced as "coming days" — not yet released as of Sept 30, 2026.
ChatGPT access is through paid Work & Codex tiers (Plus/Pro/Business/Enterprise/Edu) — not free Chat.

Source: OpenAI announcement. Prices change — verify before buying. See also: which model to pick.