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Flagship — best answers, highest costCommercial API
GPT-5.6 Terra Pricing
OpenAI · openai-gpt-5-6-terra
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/mo10,000 requests / month$90.00/mo100,000 requests / month$900.00/moEstimate your own workloadOpens the calculator with GPT-5.6 Terra 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 inputs and outputs effectively, supporting large-scale document analysis and multi-step reasoning within a 1M-token context window.
The business tradeoff
Output pricing of $15 per million tokens raises costs for long generations; restricted to commercial API with no self-hosted options.
Cheaper from OpenAI
Head-to-head
Vendor list rates, as of Jul 9, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.