GPT-5.6 Terra Pro

OpenAI · Mid · Multimodal

GPT-5.6 Terra with reasoning mode set to "pro" for higher-quality outputs on complex reasoning tasks.

Strengths: Delivers more thorough and accurate reasoning on difficult problems by allocating additional computational resources to the reasoning process.
Best for: Multi-step problem solving, complex analysis, and tasks requiring detailed logical chains where response quality is prioritized over latency.
Limitations: Slower response times compared to standard reasoning modes due to extended computation; may be overkill for straightforward queries or tasks with tight latency requirements.

Input / 1M

$2.50

Output / 1M

$15.00

Cached input / 1M

$0.25

Context window

1.05M

Also billed

Flagship prices over time

Every provider's most-powerful model, priced at launch, charted on one log axis.

Effective	Input	Output	Cached in	Note	Source
10 Jul 2026	$2.50	$15.00	$0.25	Imported from OpenRouter	openrouter.ai

GPT-5.6 Luna Pro

Mid

in $1.00 · out $6.00

GPT-5.6 Luna

Mid

in $1.00 · out $6.00

GPT-5.6 Terra

Mid

in $2.50 · out $15.00

GPT-5.6 Sol Pro

Mid

in $5.00 · out $30.00

Data updated Jul 10, 2026 Report a problem