OpenAI: GPT-5.6 Terra

OpenAI: GPT-5.6 Terra is a large language model from OpenAI. It costs $2.00 per million input tokens and $12.00 per million output tokens. Its context window is 1.1M tokens.

ReasoningTool callingStructured outputPrompt cachingBatch tierfile inputimage input

Input / 1M tokens: $2.00
Output / 1M tokens: $12.00
Cached input / 1M: $0.200
Context window: 1.1M

This model also charges $0.01 per search request

That is $10.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.008, so the search fee is 1.3× the token cost. Per-token rankings elsewhere ignore this entirely.

Who serves it cheapest

3 hosts serve GPT-5.6 Terra. Same weights, same API - the price difference is pure margin and routing.

Providers serving OpenAI: GPT-5.6 Terra, cheapest first
Provider	Input / 1M	Output / 1M	Context	Throughput	Uptime 24h
OpenAICheapest	$1.00	$6.00	1.1M	-	100.0%
Azure	$2.00	$12.00	1.1M	-	100.0%
Amazon Bedrock	$2.20	$13.20	1.1M	-	-

The spread between OpenAI and Amazon Bedrock is 2.2× for identical weights. Quantization and context limits differ, so check both columns before switching.

Benchmarks

Independent scores published alongside the catalogue.

Intelligence index: 42.3
Coding index: 76.7
Agentic index: 43.7

About 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...

Specifications

OpenAI: GPT-5.6 Terra specifications
Model ID	`openai/gpt-5.6-terra`
Provider	OpenAI
Context window	1.1M tokens
Max output	128K tokens
Input modalities	file, image, text
Output modalities	text
Knowledge cutoff	2026-02-16
Open weights	No
Released	July 9, 2026

Cheaper alternatives

Models that cost less than GPT-5.6 Terra while keeping at least half its context window and every input modality it supports.

GPT-5.6 Sol Pro

$2.00 in · $10.00 out

1.1× cheaper

GPT-5.6 Sol

$2.00 in · $10.00 out

1.1× cheaper

Claude Sonnet 5

$2.00 in · $10.00 out

1.1× cheaper

GPT-4.1

$2.00 in · $8.00 out

1.3× cheaper

Gemini 2.5 Pro

$1.25 in · $10.00 out

1.3× cheaper

Frequently asked

How much does OpenAI: GPT-5.6 Terra cost?

$2.00 per million input tokens and $12.00 per million output tokens. Cached input reads cost $0.200 per million tokens.

What is the context window of OpenAI: GPT-5.6 Terra?

1.1M tokens, with up to 128K tokens of output per request.

Does OpenAI: GPT-5.6 Terra have extra fees beyond per-token pricing?

Yes. OpenAI: GPT-5.6 Terra charges $0.01 per search request - $10.00 per 1,000 requests - on top of $2.00 per million input tokens and $12.00 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 1.3× the token cost.

Which provider serves OpenAI: GPT-5.6 Terra cheapest?

OpenAI at $1.00 per million input tokens - 2.2× cheaper than Amazon Bedrock, the most expensive of the 3 hosts serving it.

Confirm against the source: OpenAI official pricing.