GPT-5.6 Sol Pro Listed: $5 Input, $30 Output, 1050k Context Window

What OpenAI Just Listed

OpenAI added GPT-5.6 Sol Pro to the API roster on 2026-07-09. It accepts file, image, and text inputs and returns text — a multimodal-in, text-out setup that suits document analysis, vision-assisted coding, and long-context summarization.

The headline numbers: $5.00 per 1M input tokens and $30.00 per 1M output tokens, with a context window of 1,050,000 tokens (roughly 750,000–800,000 words, depending on content).

Who Should Care

The 1050k context is genuinely large — useful for processing entire codebases, lengthy legal documents, or multi-session conversation threads without chunking. If your pipeline is input-heavy and output-light (e.g., retrieval, classification, summarization), the $5.00 input rate is workable.

The $30.00 output price is the sticking point. For generation-heavy workflows — drafting, agentic loops, multi-turn chat — costs will climb fast. A task generating 100k output tokens costs $3.00 in a single run; at scale that adds up quickly against cheaper alternatives.

Quick Cost Sanity Check

• Input-heavy workload (1M in / 50k out): ~$6.50 per run
• Output-heavy workload (100k in / 1M out): ~$30.50 per run

If your use case skews toward output generation, it's worth comparing against models with lower output pricing before committing.

Bottom Line

GPT-5.6 Sol Pro is a credible option for long-context, input-dominant tasks where the 1050k window solves a real problem. For output-intensive work, the $30.00 output rate demands careful budget modeling. Check current pricing, context details, and alternatives at GPT-5.6 Sol Pro — live specs & price history.

Ezra, Scout AI Team