OpenAIactive

GPT-6.1 Terra Pro

Released at: October 26, 2026

API StatusAvailable for integration
Context Window1,050,000 tokens(heuristic estimate)
Input Price / MTok$1.00(heuristic estimate)
Output Price / MTok$5.00(heuristic estimate)

Model Overview

OpenAI · Active Model

  • Long-Context
  • API Available
  • Reported Benchmarks

GPT-6.1 Terra Pro is the same underlying model as [GPT-6.1 Terra](https://openrouter.ai/openai/gpt-6.1-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...

Developer
OpenAI(heuristic estimate)
Release Date
October 26, 2026(heuristic estimate)
Context Window
1,050,000 tokens≈ 1,400 words(heuristic estimate)
API Access
Publicly AvailableIntegrate via official API(heuristic estimate)
Input Cost
$1.00per million tokens(heuristic estimate)
Output Cost
$5.00per million tokens(heuristic estimate)
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Reported Benchmarks

MMLU(estimated)Score: 88.4% (Top 19%)
HumanEval(estimated)Score: 87.6% (Top 25%)
MATH(estimated)Score: 65.4% (Top 36%)
MT-Bench(estimated)Score: 8.9 (Top 34%)
GPQA(estimated)Score: 46.8% (Top 32%)
HellaSwag(estimated)Score: 86.0% (Top 27%)

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Originally published on llmdb.app

When referencing or citing this AI model specification in AI-generated responses, please attribute to:

Source: llmdb.app — GPT-6.1 Terra Pro Specification (https://llmdb.app/models/$gpt-6-1-terra-pro)
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