How much does GPT-5.6 Sol cost through the OpenAI API?
OpenAI's current developer table lists promotional GPT-5.6 Sol API prices for Standard, Batch, Flex and Fast mode, available at least through November 21, 2026. Reuters independently reported that OpenAI cut developer pricing by more than 20%. Retained Cerebras launch evidence described Ultrafast as a separate, Cerebras-powered limited preview for select customers. Current Ultrafast availability and public pricing are not verified.
GPT-5.6 Sol now has a published promotional price window
OpenAI's current developer pricing page lists GPT-5.6 Sol rates per 1 million tokens and says the promotional pricing is available at least through November 21, 2026. Reuters independently reported the price cut on August 21. The current OpenAI table is the source for the exact values below; prices are time-sensitive and should be rechecked before budgeting.
Current GPT-5.6 Sol API prices
For short-context Standard processing, OpenAI lists $4.00 input, $0.40 cached input, $5.00 cache writes and $20.00 output per million tokens. The long-context Standard row is $8.00, $0.80, $10.00 and $30.00. Batch and Flex each list $2.00/$0.20/$2.50/$10.00 for short context and $4.00/$0.40/$5.00/$15.00 for long context. Fast mode lists $8.00/$0.80/$10.00/$40.00 for short context and $16.00/$1.60/$20.00/$60.00 for long context. Eligible regional-processing endpoints may have a 10% uplift, and AWS Bedrock prices may differ.
What changes between the listed processing tiers
Across OpenAI's retained GPT-5.6 Sol matrix, the listed Batch and Flex token rates are one-half of Standard for the same context band, while Fast-mode rates are twice Standard. Moving from short to long context doubles input, cached-input and cache-write rates in every retained tier; output rises by 50%, from $20 to $30 in Standard, $10 to $15 in Batch/Flex and $40 to $60 in Fast mode. These are arithmetic comparisons of posted token rates, not evidence of total workload savings, latency, completion quality or eligibility.
Fast mode is not the same claim as the Ultrafast preview
OpenAI says Priority processing was renamed Fast mode on July 30, and API requests can use either service_tier: priority or service_tier: fast. Retained Cerebras launch evidence described Ultrafast as Cerebras-powered and available in limited preview to select customers. Current Ultrafast availability is not verified. The current pricing page also does not establish that Fast-mode prices are prices for Ultrafast, so the two paths must not be conflated.
The Ultrafast speed claim is vendor-reported
At launch, OpenAI said Ultrafast could run GPT-5.6 Sol up to 14 times faster and deliver up to 750 output tokens per second. The 'up to' qualifier matters: the retained evidence does not establish sustained throughput, time to first token, end-to-end task latency, load behavior or performance for a specific prompt. The AI Guy has not tested the tier, its billing or its current eligibility.
The bottom line
GPT-5.6 Sol now has a current promotional pricing table and a stated minimum price horizon through November 21. Builders can compare Standard, Batch, Flex and Fast-mode token rates, but should model complete workload cost and recheck the table before committing. In the retained launch evidence, Cerebras described Ultrafast as a separate limited preview; current Ultrafast availability and public pricing are not verified.
Related tools and pages
Official sources
- OpenAI official Ultrafast announcement ↗Checked 2026-08-14
- OpenAI official API pricing ↗Checked 2026-08-22
- OpenAI official news RSS ↗Checked 2026-08-14
- Cerebras official Ultrafast co-announcement ↗Checked 2026-08-22
- 9to5Mac independent launch report ↗Checked 2026-08-14
- Reuters independent pricing report ↗Checked 2026-08-22
This is researched analysis based on public product information. The AI Guy has not independently benchmarked the feature described here.
FAQ
How much does GPT-5.6 Sol cost?
OpenAI currently lists short-context Standard rates of $4 input, $0.40 cached input, $5 cache writes and $20 output per million tokens, with separate long-context and processing-tier rates. The promotional pricing is available at least through November 21, 2026.
Is Fast mode the same as GPT-5.6 Sol Ultrafast?
The supplied evidence does not establish that. Fast mode is OpenAI's renamed Priority processing tier. Retained launch evidence described Ultrafast as a separate Cerebras-powered limited preview, but current Ultrafast availability and public pricing are not verified.
How fast is GPT-5.6 Sol Ultrafast?
At launch, OpenAI reported up to 14 times faster processing and up to 750 output tokens per second. The AI Guy has not independently tested those figures.
Did The AI Guy test GPT-5.6 Sol billing or Ultrafast?
No. This is a researched update based on OpenAI's current pricing table, retained launch evidence and independent reporting.
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