GPT-5.6 Terra Pro API pricing
1 provider serves GPT-5.6 Terra Pro. GPT-5.6 Terra Pro is a proprietary API model, up to 1050K context. Prices below are per 1M tokens, cheapest input first.
Refreshed 2026-07-09 · list prices from provider APIs| Provider | Input $/1M | Output $/1M | Cache read $/1M | Context | |
|---|---|---|---|---|---|
| OpenRoutermarketplace quote | $2.50 | $15.00output floor | $0.250 | 1050K | Use |
The cheapest way to run GPT-5.6 Terra Pro
On an illustrative 70M-input / 30M-output monthly workload, today's cheapest listed option is OpenRouter at roughly $625/month. Input-heavy, output-heavy and cache-heavy workloads can produce different winners—use the live mix calculator below rather than combining floors from two different providers. It is API-only, so the table above is your full set of options. Run your own numbers in the breakeven calculator, or read the breakeven math.
Your actual monthly cost
Cache read uses the listed cache rate where available; otherwise it falls back to normal input price. Batch, write-cache, volume and negotiated discounts are excluded.
Related models
| Model | Cheapest in $/1M | Cheapest out $/1M | Providers |
|---|---|---|---|
| GPT-OSS 120B | $0.050 | $0.250 | 20 |
| GPT-OSS 20B | $0.015 | $0.070 | 14 |
| GPT-5 | $1.25 | $10.00 | 8 |
| GPT-5 Mini | $0.250 | $1.20 | 7 |
| GPT-5 Nano | $0.050 | $0.400 | 7 |
| GPT-4o | $2.50 | $10.00 | 6 |
FAQ
What is the cheapest API for GPT-5.6 Terra Pro?
As of 2026-07-09, the lowest input price for GPT-5.6 Terra Pro is OpenRouter at $2.50 per 1M input tokens. The lowest output price is OpenRouter at $15.00 per 1M output tokens. The cheapest provider for a real workload depends on its input/output mix.
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