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Flagship — best answers, highest costCommercial API
GPT-5.6 Luna Pro (batch) Pricing
OpenAI · openai-gpt-5-6-luna-pro-batch
Input / 1M tokens
$0.100
Output / 1M tokens
$0.600
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)$0.0004
1,000 requests / month$0.36/mo10,000 requests / month$3.60/mo100,000 requests / month$36.00/moEstimate your own workloadOpens the calculator with GPT-5.6 Luna Pro (batch) preloaded — adjust volume and token counts there.
Price history
Only one price point recorded so far.
The staircase chart appears once a price change is detected.
What it excels at
Handles 1M-token contexts and 128k outputs for long-document analysis, multi-step reasoning, and vision tasks.
The business tradeoff
Batch-only access limits real-time use; output-token pricing remains higher than input despite low absolute rates.
Cheaper from OpenAI
Head-to-head
Vendor list rates, as of Aug 6, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.