GPT-6.1 Sol vs GPT-6 Sol Cost
Compare current GPT-6.1 Sol with previous GPT-6 Sol for the same workload. Cached reads cost 50% less; total savings depend on your cache share.
Official OpenAI rates · Last verified September 30, 2026
What changed in Sol pricing?
| Model | Input / 1M | Cached read / 1M | Cache write / 1M | Output / 1M |
|---|---|---|---|---|
| GPT-6.1 Sol | $2.00 | $0.10 | $2.50 | $10.00 |
| GPT-6 Sol · Previous | $2.00 | $0.20 | $2.50 | $10.00 |
Fresh input and output rates are unchanged. Cached reads fell from $0.20 to $0.10 per 1M short-context tokens: a 50% reduction in that rate, not a universal 50% reduction in total cost. Cache writes remain $2.50.
Compare the same workload
For 100K input, 10K output, one Standard short-context request, and no cache writes: at 0% cached reads both cost $0.30. At 50% reads, previous Sol costs $0.210 and 6.1 Sol costs $0.205. At 100% reads, previous Sol costs $0.120 and 6.1 Sol costs $0.110.
Change cache share in the calculator to see the actual savings. The selected processing mode, long-context band and EU regional uplift are applied to both models where available.
Legacy model URLs remain available
GPT-6 Sol cost calculator retains its own canonical URL. GPT-6.1 Sol cost calculator is a separate current-model page.
Frequently asked questions
How much does GPT-6.1 Sol cost?
Standard short-context rates per 1M tokens are $2.00 fresh input, $0.10 cached read, $2.50 cache write and $10.00 output.
When does long-context pricing apply?
Input above 272,000 tokens uses long rates for the full request: $4.00 fresh input, $0.20 cached read, $5.00 cache write and $15.00 output. Exactly 272,000 input tokens remains short context.
Does Fast mode work with EU regional processing?
No. Fast costs 2× Standard with global processing. EU regional processing adds 10% and supports Standard, Flex and Batch; the calculator blocks EU plus Fast.
Is GPT-6.1 Sol always 50% cheaper than GPT-6 Sol?
No. Cached reads cost 50% less. Fresh input, cache writes and output have the same published rates. Total savings depend on the cached-read share and workload.
Official sources
GPT-6.1 Sol model documentation · OpenAI API pricing · Pricing methodology