OpenAIGPT-5.6 Terra
The balanced GPT-5.6 tier for everyday professional work: competitive with GPT-5.5 at roughly half the price, with the same 1.05M context window.
Source: OpenAI models, OpenAI pricing, Prompt caching (1,024 minimum, 30m TTL)
Pricing
Every billing leg from the live catalog, in USD per 1M tokens.
| Billing leg | Standard | Long context | Batch |
|---|---|---|---|
| Input | $2 / M | $4 / M | $1 / M |
| Output | $12 / M | $18 / M | $6 / M |
| Cache read | $0.2 / M | $0.4 / M | $0.1 / M |
| Cache write | $2.5 / M | $5 / M | $1.25 / M |
Long-context rates apply above 272,000 input tokens.
Cost calculator
Billing-grade math over the rate card above, including the thinking tokens most estimates miss.
Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.
Compare providers
The same model, priced across every platform that serves it. Lowest combined in/out rate is flagged.
| Platform | Input / M | Output / M | Cache read / M | Batch | Access |
|---|---|---|---|---|---|
OpenAILowest | $2 | $12 | $0.2 | ✓ | First-party API |
Cursor | $2 | $12 | $0.2 | — | Direct |
Price history
Has this model gotten cheaper or more expensive?
| Effective | Input / Output | Status |
|---|---|---|
| July 10, 2026 – July 30, 2026 | $2.5 / $15 | past |
| July 30, 2026 | $2 / $12 | current |
More from OpenAI
Other models from the same provider.
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SuperPenguin meters every GPT-5.6 Terra call your team makes, prices it with this exact rate card, and shows spend by feature, customer, and team.
Rates are generated from SuperPenguin's live pricing catalog.