Home › Providers › openai › OpenAI: GPT-5.6 Terra Pro
OpenAI: GPT-5.6 Terra Pro API Pricing
GPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
How much does OpenAI: GPT-5.6 Terra Pro cost for a real workload?
At 10M input + 2M output tokens per month, OpenAI: GPT-5.6 Terra Pro costs about $44 ($20 input + $24 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to OpenAI: GPT-5.6 Terra Pro?
- MoonshotAI: Kimi K3 (batch) — $2.28 in / $11.4 out per 1M
- Xiaomi: MiMo-V2.6-Pro-UltraSpeed — $4.35 in / $8.7 out per 1M
- OpenAI: GPT Audio — $2.5 in / $10 out per 1M
- Cohere: Command A — $2.5 in / $10 out per 1M
- OpenAI: GPT-4o (2024-11-20) — $2.5 in / $10 out per 1M
- Cohere: Command R+ (08-2024) — $2.5 in / $10 out per 1M
Compare OpenAI: GPT-5.6 Terra Pro with other models
OpenAI: GPT-5.6 Terra Pro vs OpenAI: gpt-oss-20bOpenAI: GPT-5.6 Terra Pro vs OpenAI: gpt-oss-20b (batch)OpenAI: GPT-5.6 Terra Pro vs OpenAI: gpt-oss-120b (batch)OpenAI: GPT-5.6 Terra Pro vs OpenAI: GPT-5 Nano (batch)OpenAI: GPT-5.6 Terra Pro vs OpenAI: GPT-4.1 Nano (batch)OpenAI: GPT-5.6 Terra Pro vs OpenAI: GPT-6 Luna Pro (batch)
Frequently asked questions
How much does OpenAI: GPT-5.6 Terra Pro cost?
OpenAI: GPT-5.6 Terra Pro costs $2 per 1M input tokens and $12 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $44.
What is the context window of OpenAI: GPT-5.6 Terra Pro?
OpenAI: GPT-5.6 Terra Pro has a context window of 1,050,000 tokens and can return up to 128,000 output tokens per response.
What are cheaper alternatives to OpenAI: GPT-5.6 Terra Pro?
Cheaper models include MoonshotAI: Kimi K3 (batch) ($2.28 in / $11.4 out), Xiaomi: MiMo-V2.6-Pro-UltraSpeed ($4.35 in / $8.7 out), OpenAI: GPT Audio ($2.5 in / $10 out). See the full list on this page.
Is OpenAI: GPT-5.6 Terra Pro free to use?
No. OpenAI: GPT-5.6 Terra Pro is a paid model at $2 input / $12 output per 1M tokens. 20 free models are listed on the free models page.
Provider: openai · Model ID: openai/gpt-5.6-terra-pro · Modality: text+image+file->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices