ModelPricing.aiGPT-5.6 Terra API Pricing
GPT-5.6 Terra costs $2.00 per million input tokens and $12.00 per million output tokens on the OpenAI API. Prices are tracked from the official OpenAI pricing table and used by the ModelPricing.ai estimation API, so this page and the API always quote the same numbers. See all OpenAI model pricing or the full LLM pricing comparison.
GPT-5.6 Terra Pricing Per Million Tokens
| Tier | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M |
|---|---|---|---|---|
| Up to 272K input tokens | $2.00 | $12.00 | $0.200 | $2.50 |
| Above 272K input tokens | $4.00 | $18.00 | $0.400 | $5.00 |
What GPT-5.6 Terra Costs In Practice
Monthly cost at three representative workloads, using the standard text rate in effect today.
| Workload | Monthly cost |
|---|---|
| Light — 1M in / 200K out | $4.40 |
| Moderate — 10M in / 2M out | $44.00 |
| Heavy — 100M in / 20M out | $440.00 |
Need your own numbers? Use the LLM cost calculator or call the estimation API directly.
Compare GPT-5.6 Terra With Other Models
Looking for something cheaper from OpenAI? GPT-5 Nano is the lowest-priced option on input tokens.
GPT-5.6 Terra Pricing FAQ
How much does GPT-5.6 Terra cost per token?
GPT-5.6 Terra costs $2.00 per million input tokens and $12.00 per million output tokens on the OpenAI API. That works out to $0.0020 per thousand input tokens.
How much does it cost to run GPT-5.6 Terra per month?
At 1M in / 200K out per month, GPT-5.6 Terra costs about $4.40. A heavier workload of 100M input and 20M output tokens costs about $440.00.
Does GPT-5.6 Terra charge more for long context?
Yes. GPT-5.6 Terra uses breakpoint pricing: requests above 272K input tokens move to a higher rate of $4.00 per million input tokens, up from $2.00 below the threshold.
Does GPT-5.6 Terra support prompt caching?
Yes. Cached input tokens are billed at $0.200 per million on GPT-5.6 Terra, compared with $2.00 per million for uncached input.
Estimate GPT-5.6 Terra costs programmatically
POST a token count to /v1/estimate with model gpt-5.6-terra and get a priced breakdown back, promotions
already applied.