Official-source comparison

GPT-5.6 Sol vs GPT-5.6 Terra

OpenAI vs OpenAI. Estimate the cost change between two OpenAI offerings.

USD token-only estimates using each offering’s published default tier. 1M tokens are an aggregate workload, not a single request. Cache savings, batch discounts, long-context surcharges, tools, taxes and negotiated rates are excluded. Tokenizers and capabilities may differ; lower price does not establish equivalent quality.

Current cost comparison is paused because one or both quotes are not verified. The rates below are historical references, not current offers.

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Historical prices and specifications; current estimates paused
MetricGPT-5.6 SolOpenAIGPT-5.6 TerraOpenAI
Input / 1M tokens$4.00$2.00
Output / 1M tokens$20.00$12.00
Cached input / 1M$0.40$0.20
Context window1,050,0001,050,000
Maximum output128,000128,000
1M input + 1M outputPausedPaused
Default pricing basisstandardstandard
Last verified (UTC)2026-09-09T01:36:53.730Z2026-09-09T01:36:54.046Z

Official sources and pricing scope