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GPT-6.1 Sol vs GPT-6.1 Sol Pro

GPT-6.1 Sol is the cheaper option on input; GPT-6.1 Sol is cheaper on output. Figures below are per million tokens, from vendor pricing cited in our reporting.

 GPT-6.1 SolGPT-6.1 Sol Pro
Input per 1M tokens$2$2
Output per 1M tokens$10$10
Cached input per 1M$0.10$0.10
Context window—1.05M tokens
Parameters——
Licenceproprietary
Benchmark——
VendorOpenAIOpenAI
Released29 Sept 2026—

What the numbers say

Sources

GPT-6.1 Sol specs · GPT-6.1 Sol Pro specs · Full price index