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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. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
At a glance
- Context window
- 1.1Mtokens
- Max output
- 128Ktokens
- Knowledge to
- 2026-02-16
- Released
- 2026
Capabilities
CapabilitiesReasoningVisionToolsStructured output
InputFileImageText
OutputText
ReasoningSupportedmaxxhighhighmediumlownone
Performance
Reference uptime
100%
Aug 18Sep 16
Median latency
9,434 ms
Aug 18Sep 16
Throughput
85.3 tok/s
Aug 18Sep 16
IranRouter uptime comes from our own automated probes; the reference figures are daily measurements of this model's upstream routes. Each card shows a 30-day average, and a day without data stays empty.
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Parameters this model accepts; anything else is ignored.
Quick start
from openai import OpenAI
client = OpenAI(
api_key="ir-...",
base_url="https://iranrouter.com/v1",
)
resp = client.chat.completions.create(
model="openai/gpt-5.6-terra-pro",
messages=[{"role": "user", "content": "سلام!"}],
)
print(resp.choices[0].message.content)Only base_url and the key change; the rest of your code stays as it is.