GPT-5.6 API pricing
OpenAI's current flagship API model (the full-size tier, listed as gpt-5.6-sol).
Input
$5.00
per 1M tokens
Cached input
$0.50
per 1M tokens
Cache write
$6.25
per 1M tokens
Output
$30.00
per 1M tokens
Context window
1M
max output 125K
Prices last synced Aug 20, 2026 from the LiteLLM community price catalog — the same catalog Marginal prices real usage events against, refreshed daily. Hand-checked against the provider's official pricing page on Aug 20, 2026. Spot an error? Tell us.
Pricing notes
- OpenAI's price list names this tier gpt-5.6-sol; the family also bills cache WRITES ($6.25/1M, 1.25x input) — earlier GPT families wrote to the cache free.
- Long-context surcharge: once input exceeds ~272K tokens the whole request bills at $10.00 input / $1.00 cached / $45.00 output per 1M.
- Batch and Flex tiers are 50% off these rates; Fast mode is roughly 2x (varies by model).
What would GPT-5.6 cost you?
Enter your workload — add other models to compare the same traffic across providers.
Your monthly workload
Cache hit rate = share of input tokens served from the provider's prompt cache, billed at the model's cached-input price. Estimates use standard per-token rates — batch discounts, service tiers, and long-context surcharges are not applied.
| Model | Input | Cached input | Output | Per request | Monthly |
|---|---|---|---|---|---|
| GPT-5.6 | $3,000 | $200 | $7,500 | $0.021 | $10,700 |
Compare GPT-5.6
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