GPT-5.6 Sol API pricing and agent cost
| Provider | OpenAI |
|---|---|
| Input | $4.0 / 1M tokens |
| Output | $20.0 / 1M tokens |
| Cached input | $0.4 / 1M tokens |
Promotional pricing, available at least through November 21, 2026 (per OpenAI). Cache read $0.40, 30-minute cache write $5.00 (default), 12-hour cache write $10.00 per 1M tokens. Long context (>272K input tokens): $8 input / $0.80 cached / $10 cache write / $30 output. Batch $2/$10, Fast mode $8/$40.
Source: https://developers.openai.com/api/docs/pricing (checked 2026-10-25)
Example agent cost
An agent making 5 tool calls per task, with 3,000 input and 800 output tokens per call, running 100 tasks a day costs about $0.1400 per task, $14.00 per day, and $420.00 per month on GPT-5.6 Sol.
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