OpenAI · Released Apr 10, 2026
GPT-5.6 Terra (max)
Balanced production tier in the GPT-5.6 family optimized for enterprise throughput, reliability, and structured API workflows.
OpenRating Index
56.4
0–100 composite
Reasoning Index
76.8
0–100 composite
Cost / Task
$0.51
benchmark run
Output speed
86 tok/s
blended tok/s
Time to first token
0.7s
median latency
Input price
$0.6
per 1M tokens
Output price
$2.4
per 1M tokens
Context window
400K
tokens
Strengths
Balanced price-to-performance sweet spot for high volume
400k context window with rapid caching
Native support for complex schema extraction
How we rate GPT-5.6 Terra (max)
OpenRating scores every model on the same axes. The OpenRating Index is a weighted composite of reasoning, knowledge, and agentic benchmarks, normalised to a 0–100 scale. Speed is blended output measured in tokens per second under standardised load, with time-to-first-token reported separately. Prices are list input and output prices per million tokens, and Task Cost measures end-to-end workload spending.
OpenRating Index
56.4
Reasoning Index
76.8
Token Pricing
Input per 1M tokens
$0.6
Output per 1M tokens
$2.4
Cost of 1M input + 1M output
$3
Task Cost Economics
Empirical cost breakdown for a standard OpenRating Index benchmark task ($0.51 total).
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