OpenAI
·Released on Jul 9, 2026

GPT-5.6 Terra Pro API Benchmarks, Pricing & Provider Data

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LLM

GPT-5.6 Terra Pro API pricing covers undefined API provider} other undefined API providers}}, from $1.03/M to $480.00/M.

GPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. ...

Cost
$1.03/ 1M · 8:1 in:out
$0.165 in · $0.865 out

Specifications

Input and output token limits for this model, plus how it ranks on long-context understanding.

INPUT
1.1Mtokens
1.3K pages of text
OUTPUT
128Ktokens
8K128K1M4M
1.1M

Features

Technical Details

Input
Output
Released
Jul 2026
Knowledge cutoff
2026-02-16
Documentation
Tokenizer
GPT
Architecture
text+image+file->text
Moderated
Yes
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools

OpenRouter endpoints

5 endpoints

Third-party OpenRouter endpoint data, shown separately from LMSpeed measurements. Some 30-minute live performance fields only appear after syncing with an OpenRouter API key.

Provider endpointInputOutput1d uptime30m latency30m throughputContext / output
OpenAI
openai/fast
$4/M$24/M100%undefined tokens / undefined tokens
OpenAI
openai/flex
$1/M$6/M100.0%undefined tokens / undefined tokens
Azure
azure
$2/M$12/M99.9%undefined tokens / undefined tokens
OpenAI
openai
$2/M$12/M99.8%undefined tokens / undefined tokens
Azure
azure/eu
$2.20/M$13.20/Mundefined tokens / undefined tokens

Pricing Comparison

Compare GPT-5.6 Terra Pro API pricing across 3 providers. Prices range from $1.03/M to $480.00/M. 空悲切b2b API offers the lowest rate at $1.03/M.

ProviderHealthModel VariantGroupInput ($/M)Output ($/M)Speed (t/s)First tokenAudit
L1
100%
gpt-5.6-terra-pro
OFC
$300.00/M
$2400.00/M
L1
0%
openai/gpt-5.6-terra-pro
or
$1.03/M
Cache read$0.103/MCache write$1.29/MCache write 1h$2.06/M
$6.18/M

Alternatives & Similar Models

Frequently Asked Questions

What benchmark data does GPT-5.6 Terra Pro include?
LMSpeed shows GPT-5.6 Terra Pro benchmark context, API price, output speed, first-token latency, and provider data across 3 providers when those signals are available.
What is the GPT-5.6 Terra Pro API price?
GPT-5.6 Terra Pro has pricing from undefined provider} other undefined providers}}, ranging from $1.03/M to $480.00/M. 空悲切b2b API has the lowest listed price.
What does the GPT-5.6 Terra Pro API pricing table include?
The GPT-5.6 Terra Pro API pricing table compares 3 providers by input price, output price, free tier status, speed, first-token latency, and recent health data when available.
Which provider has the cheapest GPT-5.6 Terra Pro API pricing?
空悲切b2b API currently has the lowest listed GPT-5.6 Terra Pro price at $1.03/M across undefined provider} other undefined providers}}.
Is GPT-5.6 Terra Pro API free?
GPT-5.6 Terra Pro does not currently have a free API tier on LMSpeed. All 3 providers charge per token.

Also known as

gpt-5.6-terra-proopenai/gpt-5.6-terra-proopenai/gpt-5.6-terra-pro:batch

Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.Standard benchmark data may include BenchLM and other public sources.

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