Flagship — best answers, highest costCommercial API

GPT-5.6 Sol Pro Pricing

OpenAI · openai-gpt-5-6-sol-pro

ShareX Facebook LinkedIn

Input / 1M tokens

$2.00

Output / 1M tokens

$10.00

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)$0.0064

1,000 requests / month$6.40/mo 10,000 requests / month$64.00/mo 100,000 requests / month$640.00/mo

Estimate your own workloadOpens the calculator with GPT-5.6 Sol 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 for long-document reasoning and multi-step analysis. Integrates vision with text for multimodal tasks requiring extended outputs.

The business tradeoff

Output pricing at $30 per million tokens raises costs for generation-intensive use. Large model size can increase latency on complex queries.

Cheaper from OpenAI

GPT-5.6 Luna ProOpenAI$0.0007/ typical request GPT-5.6 Luna (batch)OpenAI$0.0004/ typical request GPT-5.6 Terra Pro (batch)OpenAI$0.0036/ 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 Sol Pro vs Claude Fable 5 →GPT-5.6 Sol Pro vs Qwen3.7 Plus →GPT-5.6 Sol Pro vs Grok 4.3 →

Vendor list rates, as of Aug 21, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.