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OpenAI: GPT-5.6 Terra Pro

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

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Overview

Model specifications

Context
1,050,000 tokens
Maximum output
128,000 tokens
Architecture
text+image+file->text
Tokenizer
GPT
Knowledge cutoff
2026-02-16
Moderated
Yes
Capabilities

Input → Output

Input
fileimagetext
Output
text
Reasoning

Yes · max · xhigh · high · medium · low · none

API

Supported API parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Available providers

5 providers

OpenAI

unknown
Context
1.1M
Maximum output
128K
Input
$1.00
Output
$6.00
Cache read
$0.100
Cache write
$1.25

Azure

unknown
Context
1.1M
Maximum output
128K
Input
$2.00
Output
$12.00
Cache read
$0.200
Cache write
$2.50

OpenAI

unknown
Context
1.1M
Maximum output
128K
Input
$2.00
Output
$12.00
Cache read
$0.200
Cache write
$2.50

Azure

unknown
Context
1.1M
Maximum output
128K
Input
$2.20
Output
$13.20
Cache read
$0.220
Cache write
$2.75

OpenAI

unknown
Context
1.1M
Maximum output
128K
Input
$4.00
Output
$24.00
Cache read
$0.400
Cache write
$5.00
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models

All models
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OpenAI: GPT Transcribe

GPT Transcribe is a high-accuracy speech-to-text model from OpenAI. It is suited for recorded audio, streamed file transcription, and committed Realtime turns, with free-form context, keyword hints, and multiple language...

Context
Not provided
Input
audio
Output
transcription
Input: $4500.00Output: Freeper 1M tokens
View model details →
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OpenAI: GPT-5.6 Luna Pro

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with reasoning.mode set to pro for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

Context
1.1M
Input
file · image · text
Output
text
Input: $0.200Output: $1.20per 1M tokens
View model details →
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OpenAI: GPT-5.6 Luna

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

Context
1.1M
Input
file · image · text
Output
text
Input: $0.200Output: $1.20per 1M tokens
View model details →
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OpenAI: GPT-5.6 Terra

GPT-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...

Context
1.1M
Input
file · image · text
Output
text
Input: $2.00Output: $12.00per 1M tokens
View model details →