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Flagship — best answers, highest costCommercial API
GPT-5.6 Terra Pricing
OpenAI · openai-gpt-5-6-terra
Input / 1M tokens
$2.00
Output / 1M tokens
$12.00
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)$0.0072
1,000 requests / month$7.20/mo10,000 requests / month$72.00/mo100,000 requests / month$720.00/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. Each step marks a price change — hover a point for the exact date and rate.
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 Aug 17, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.