GPT-5.6 Terra Pro
openai/gpt-5.6-terra-pro- OpenAI
- Family · GPT-5 Terra Pro
- File · Image · Text → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Not on OSMEXO yet
Spec & list price
Context1M
Max output128K
Input / 1M$2.00
Output / 1M$12.006× input
Usage
Tokens / day560.5M▼ 39% 7d
Usage rank#224
Requests / day4.2K
Tool calls / req0.27
Per request · 30 days
Avg input66.3K4.5× median
Avg output1.9K2.7× median
Cache hit68%about median
Reasoning share45%0.8× median
Tool-call failures0.5%0.3× median
Consumption
Peak 3.1B 27 SepLow 127.2M 24 OctRank today #224
News & trends
News · latest from OpenAI
- GPT-6.1 Terra vs. Claude Opus 5.5: Cheaper and faster in three tests at maxthenewstack.io · 2 Nov
- Chinese labs now target OpenAI's GPT-6 Astra for distillationfork.zone · 1 Nov
- GPT-6.1 Terrasimonwillison.net · 31 Oct
- GPT-5.6 Sol can beat Factorio on peaceful moderyanmadden.net · 31 Oct
Speed
Output speed#110/33481 tok/s1.3× faster than median
Fastest provider114 tok/sbest of 3 providers
First token#3033.9 s3.6× longer than median
Technical details
- Reasoning
- on · medium
- Tokenizer
- GPT
- Knowledge cutoff
- 2026-02-16
- Moderation
- moderated
Reasoning effort
- max
- xhigh
- high
- medium · default
- low
- none
Request parameters 11
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_tokens
- max_completion_tokens
- seed
+1 more
- verbosity
When to use
Best for
- Hardest reasoning with adjustable effort levels
- Very long document and codebase analysis
- Tool-calling agents on complex tasks
- Quality-first analysis with image and file inputs
Think twice for
- Quick low-cost chat replies
- High-volume simple classification
- Self-hosting (closed weights)
Same family
GPT-5 Terra ProWant GPT-5.6 Terra Pro on OSMEXO?
Sign in to request it. Requests are reviewed; a request does not guarantee availability.