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GPT-5.6 Luna Pro Pricing

OpenAI · openai-gpt-5-6-luna-pro

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Input / 1M tokens
$0.200
Output / 1M tokens
$1.20
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)$0.0007
1,000 requests / month$0.72/mo10,000 requests / month$7.20/mo100,000 requests / month$72.00/mo
Estimate your own workloadOpens the calculator with GPT-5.6 Luna Pro 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

Processes 1M-token contexts and vision inputs for long-document analysis and multimodal reasoning at high volume.

The business tradeoff

Output tokens priced at $6/M; performance and latency tied to commercial API with no local deployment option.

Cheaper from OpenAI

GPT-5.6 Luna (batch)OpenAI$0.0004/ typical requestGPT-5.6 Luna Pro (batch)OpenAI$0.0004/ typical requestgpt-oss-120bOpenAI$0.0001/ typical request

Same tier from other providers

Claude Fable 5Anthropic$0.032/ typical requestQwen3.7 PlusQwen$0.0009/ typical requestGrok 4.3xAI$0.0025/ typical request

Head-to-head

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

Vendor list rates, as of Aug 17, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.