Models / OpenAI
GPT-5.6 Terra
by OpenAI ·
openai/gpt-5.6-terraGPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
reasoningtool-usevisionreleased 2026-07-09
Legal score · raw
-
not yet benchmarked
Context
1.05M
max output 128K
Input
$2.50
per 1M tokens
Output
$15
per 1M tokens
Suite cost
-
no run recorded
Prompt caching
Grounded answers re-send the same retrieved authority every turn, so a cached read is what a long matter actually costs. Prices are per 1M tokens, from the provider’s own catalog.
Cache read
$0.25
10x cheaper than uncached
Cache write
$3.13
per 1M tokens, charged once
Uncached input
$2.50
per 1M tokens
Capabilities
Modalities
in fileimagetext
out text
Request parameters it accepts
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity
Benchmark results
This model has not been run through the suite yet. See Humanity's Last Lawsuit for the benchmark models are ranked on.