GPT-5.6 Sol pricing

Flagship LLM from OpenAI —$4.00 input and$20.00 output per 1M tokens.

GAFlagshipLong-context tierIntro price until 2026-11-21Promo available

Input /1M: $4.00
Output /1M: $20.00
Cached /1M: $0.40
Blended: $12.00
Context: 1.05M
Max output: 128K

API model id: gpt-5.6-sol

Full price matrix

Price matrix for GPT-5.6 Sol, USD per 1M tokens
Rate	Input /1M	Output /1M	Notes
Standard	$4.00	$20.00
Cached input (read)	$0.40	—	Prompt-cache hit
Batch API	$2.00	$10.00	Async, 50% off
Long context (> 272,000 tokens)	$8.00	$30.00	Input ×2, output ×1.5
Standard (after 2026-11-21)	$5.00	$30.00	Intro pricing ends

List prices, USD, directional. Rates are provider list prices per 1M tokens and are meant for comparison, not billing. Batch rates shown as 50% off are derived where a provider offers batch but does not publish a separate figure. Preview, promo, intro, peak/off-peak, long-context, and third-party-host prices are labeled where they apply. Token counts vary by tokenizer, so per-token price is not always a like-for-like cost. Always confirm with the provider before relying on a number. Prices as of 2026-08-25.
Source: https://developers.openai.com/api/docs/pricing

Pricing notes

Long-context pricing: above 272,000 tokens, input is billed at ×2 ($8.00) and output at ×1.5 ($30.00). See long-context pricing.
Intro pricing: the $4.00/$20.00 rate is introductory until 2026-11-21; the standard rate afterwards is $5.00 input / $30.00 output.
Promotion: Promotional pricing ($4 input / $20 output, cached input $0.40) available at least through 2026-11-21; reverts to the standard $5 / $30 (cached $0.50) after. Verify with OpenAI..
Once a prompt reaches the ~272K-token long-context threshold the whole request bills long-context rates: $8 input / $30 output, cached input $0.80 (promotional).

Compare GPT-5.6 Sol head-to-head

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