API pricing per million tokens
- Input
- $2
- per 1M, list
- Output
- $12
- per 1M tokens
- Cached input
- $0.2
- batch $1 / $6
- Context
- 1.05M
- 128K max output
Price history
List price since Jul 17, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
| Seen | Model | Old price | New price | Change |
|---|---|---|---|---|
| Aug 21, 2026 |  GPT-5.6 Terra ProInput $1 to $2, Output $6 to $12, Cached input $0.1 to $0.2 | Input $1Output $6Cached input $0.1 | Input $2Output $12Cached input $0.2 | +100% |
| Jul 31, 2026 | GPT-5.6 Terra ProInput $1.25 to $1, Output $7.5 to $6, Cached input $0.125 to $0.1 | Input $1.25Output $7.5Cached input $0.125 | Input $1Output $6Cached input $0.1 | -20% |
| Jul 28, 2026 | GPT-5.6 Terra ProInput $2.5 to $1.25, Output $15 to $7.5, Cached input $0.25 to $0.125 | Input $2.5Output $15Cached input $0.25 | Input $1.25Output $7.5Cached input $0.125 | -50% |
Through a gateway
Your own numbers100M input and 20M output tokens a month: $440.00 direct.
Helicone$440.00+0%
Kong AI Gateway$440.00+0%
LiteLLM$440.00+0%
Vercel AI Gateway$440.00+0%
AWS Bedrock$440.00+0%
Azure AI Foundry$440.00+0%
Google Vertex AI$440.00+0%
Databricks Mosaic AI$440.00+0%
Hugging Face Inference$440.00+0%
Cloudflare AI Gateway$462.00+5%
Requesty$462.00+5%
Eden AI$464.20+5.5%
OpenRouter$464.20+5.5%
Snowflake Cortex AI$528.00+20%
Martian Gatewayn/a
Portkeyn/a
TrueFoundry AI Gatewayn/a
IBM watsonx.ain/a
OCI Generative AIn/a
NVIDIA NIMn/a
Related models
Claude Opus 5Anthropic · 1M$5 / $25in / out per 1M$5$25$0.51MJul 24, 2026
About GPT-5.6 Terra Pro
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.
Takes files, image, text in and returns text. First listed Jul 17, 2026. Blended price $4.5 per 1M tokens at 3 input to 1 output.
Questions
How much does GPT-5.6 Terra Pro cost?
$2 per million input tokens and $12 per million output tokens, with cached input at $0.2, or $1 and $6 through the Batch API.
What is the context window of GPT-5.6 Terra Pro?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-5.6 Terra Pro cheapest?
Of 5 routes tracked, OpenAI is cheapest at $1 input and $6 output per million tokens.
Has GPT-5.6 Terra Pro's price changed?
Yes. The output price went from $6 to $12, first seen Aug 21, 2026.
List prices from providers' pages on the date shown; your contract may differ. Logos via logo.dev; trademarks belong to their owners.