GPT-5.6 Terra Pro (batch)
OPENAI Developer Architecture Profile
Intelligence (ELO)1506Chatbot Arena Verified
Max Context Limit1,050,000Max Out: 128,000 tokens
Prompt Caching90% OFF$0.10 / 1M cached
Standard API / 1M$7.00🧠 Deep Reasoner
Model Capabilities & Contract SLAs
- Coding & Logic
- Fictional
- Reasoning
- Agentic
- 📋 Strict JSON Schema
- 🛠️ Native Tool Calling
- 🧠 Extended Test-Time Reasoning
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...
Granular Pricing Matrix
Input Tokens (Standard Prompt)$1.00 / 1M
⚡ Cached Input (Prompt Cache Read)90% OFF$0.10 / 1M
Output Tokens (Completion)$6.00 / 1M
Pricing data via OpenRouter. Sync: 10/2/2026
Evaluate Competitors
VS Engine MatchupGPT-5.6 Terra Pro (batch) vs Google: Gemini 3.8 Flash (batch)VS Engine MatchupGPT-5.6 Terra Pro (batch) vs Google: Nano Banana 2 (Gemini 3.1 Flash Image)VS Engine MatchupGPT-5.6 Terra Pro (batch) vs OpenAI: GPT-5.3-CodexVS Engine MatchupGPT-5.6 Terra Pro (batch) vs OpenAI: GPT-5.2-CodexVS Engine MatchupGPT-5.6 Terra Pro (batch) vs OpenAI: GPT-5.1-Codex-MaxVS Engine MatchupGPT-5.6 Terra Pro (batch) vs OpenAI: GPT Astra Latest