Flagship — best answers, highest costCommercial API

GPT-5.6 Terra Pro Pricing

OpenAI · openai-gpt-5-6-terra-pro

ShareX Facebook LinkedIn

Input / 1M tokens

$2.50

Output / 1M tokens

$15.00

Context window

1050k tokens

≈ 1,400 pages of text

Max output

128k tokens

What it costs in practice

Typical request (1,200 in + 400 out tokens)$0.009

1,000 requests / month$9.00/mo 10,000 requests / month$90.00/mo 100,000 requests / month$900.00/mo

Estimate your own workloadOpens the calculator with GPT-5.6 Terra Pro preloaded — adjust volume and token counts there.

Price history

List price per 1M tokens since we started tracking in Jul 2026. The lines are flat because the price hasn't changed since then.

What it excels at

Handles extended context up to 1M tokens with vision support, suitable for document analysis and multimodal reasoning.

The business tradeoff

Output pricing at $15 per million tokens increases cost for generation-heavy workloads; performance depends on commercial API availability and latency.

Cheaper from OpenAI

GPT-5.6 Luna ProOpenAI$0.0036/ typical request GPT-5.4 MiniOpenAI$0.0027/ typical request GPT-5.4 NanoOpenAI$0.0007/ typical request

Same tier from other providers

Claude Fable 5Anthropic$0.032/ typical request Qwen3.7 PlusQwen$0.0009/ typical request Grok 4.3xAI$0.0025/ typical request

Head-to-head

GPT-5.6 Terra Pro vs Claude Fable 5 →GPT-5.6 Terra Pro vs Qwen3.7 Plus →GPT-5.6 Terra Pro vs Grok 4.3 →

Vendor list rates, as of Jul 9, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.