Flagship — best answers, highest costCommercial API

GPT-5.6 Sol Pro Pricing

OpenAI · openai-gpt-5-6-sol-pro

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Input / 1M tokens

$5.00

Output / 1M tokens

$30.00

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)$0.018

1,000 requests / month$18.00/mo 10,000 requests / month$180.00/mo 100,000 requests / month$1,800.00/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. The lines are flat because the price hasn't changed since then.

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$0.0036/ typical request GPT-5.4 MiniOpenAI$0.0027/ typical request GPT-5.4 NanoOpenAI$0.0007/ 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 Jul 9, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.