OpenAI: GPT-5.6 Terra

OpenAI

OpenAI: GPT-5.6 Terra by OpenAI costs $2.00 per 1M input tokens and $12.00 per 1M output tokens, with a 1.1M-token context window.

Pricing

Input (per 1M tokens)

$2.00

Output (per 1M tokens)

$12.00

Cached input (per 1M)

$0.20

Provider	Input / 1M	Output / 1M
openrouter	$2.00	$12.00
OpenAI	$2.00	$12.00

Specifications

Provider: OpenAI
Context window: 1.1M tokens
Parameters: —
Released: —
Open weights: —
Frontier model: No

Benchmarks

Epoch Capabilities Index: 159.4
GPQA Diamond: 93.3
LMArena (Chatbot Arena) Elo: 1446.8
LMArena Vision Elo: 1271.1
LMArena WebDev Elo: 1521.9

Speed & latency

Time to first token

1.11s

Output speed

163 tok/s

Fastest host: openai (via vercel-ai-gateway).

Compare OpenAI: GPT-5.6 Terra with…

OpenAI: GPT-5.6 Terra vs Gemini 3 Pro Preview$12.00/1M OpenAI: GPT-5.6 Terra vs Gemini 3.1 Pro Preview$12.00/1M OpenAI: GPT-5.6 Terra vs Gemini 3 Pro$12.00/1M OpenAI: GPT-5.6 Terra vs Gemini-3.1-Pro$12.12/1M OpenAI: GPT-5.6 Terra vs GPT-5.3-Instant$13.00/1M OpenAI: GPT-5.6 Terra vs grok-4-0709$13.50/1M

FAQ

How much does OpenAI: GPT-5.6 Terra cost?

OpenAI: GPT-5.6 Terra is priced at $2.00 per 1M input tokens and $12.00 per 1M output tokens. Output tokens cost more than input.

What is OpenAI: GPT-5.6 Terra's context window?

OpenAI: GPT-5.6 Terra supports a context window of 1.1M tokens — the maximum prompt plus response length it can handle in a single request.

Is OpenAI: GPT-5.6 Terra open weight?

Open-weight status for OpenAI: GPT-5.6 Terra is not recorded in our dataset.

Data as of 2026-10-15. Source: Pricing via OpenRouter API, openrouter.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.