GPT-5.6 Sol Pro API Pricing
OpenAI · Frontier · Proprietary · released 2026-07. Prices in USD per 1 million tokens. Data snapshot: 2026-09-29.
GPT-5.6 Sol Pro has held the same list price since 2026-08-31 and is the 9th cheapest of 31 Frontier models. Buying from OpenAI rather than at the rate quoted here lowers the token price by about 50%. It is a Frontier model released within the last three months, the period in which versions and prices change most.
- Input: $4.00 per 1M tokens
- Output: $20.00 per 1M tokens
- Batch API (input/output): $2.00 / $10.00
- Prompt-cache read: $0.40
- Context window: 1M
- Available on: Direct API, OpenRouter (curated by hand, verify with the provider)
GPT-5.6 Sol Pro market position
On blended price ($15.20 per 1M tokens at 30% input, 70% output) it is cheaper than 67% of Frontier models: 9th cheapest of 31, tied with 2 others. Across every category it is cheaper than 7% of priced text models in the catalogue: 261st cheapest of 283, tied with 2 others.
GPT-5.6 Sol Pro licence, size and capabilities
GPT-5.6 Sol Pro is recorded here as proprietary: access is through an API, priced by the token. Its parameter count is not published. Listed capabilities: Text, Vision, Reasoning, Code, Agents. Filling its 1M context window once costs $4.00 in input tokens at list price.
Monthly cost at 100K requests, by business use case
From the after-discounts figure (prompt caching on the cached input share, batch API for async workloads, only where the provider publishes those rates), which assumes you implement both, to the list price. One figure means no discount is published.
| Use case | Tokens (in/out) | Monthly (after discounts – list) |
|---|---|---|
| Support Ticket | 1,500 / 500 | $1.3K – $1.6K |
| Knowledge Q&A | 2,000 / 800 | $1.9K – $2.4K |
| Meeting Summary | 10,000 / 1,200 | $3.0K – $6.4K |
| Marketing Content | 2,500 / 1,800 | $4.4K – $4.6K |
| Coding Task | 3,000 / 2,000 | $4.7K – $5.2K |
| Invoice Processing | 1,500 / 600 | $828 – $1.8K |
| Call Summary | 2,000 / 700 | $1.1K – $2.2K |
| Agent Workflow | 6,000 / 3,000 | $6.9K – $8.4K |
GPT-5.6 Sol Pro pricing by host
A host is a company that runs the model and sells it by the token — the lab that made it, a cloud platform like Amazon Bedrock, Azure or Vertex, or an independent provider. One model, several sellers, and often several prices. This model is sold by 2 different hosts. The price quoted above is the one we publish so that models stay comparable; it is not necessarily the cheapest way to buy this model. List prices as published on 2026-09-29 via OpenRouter — negotiated rates, committed-use discounts and provisioned capacity are not shown.
Cheapest host: OpenAI at $2.00 input / $10.00 output per 1M tokens, 50% below the price we publish on a blended basis (30% input, 70% output). The dearest, Azure, charges 2.0x the cheapest.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| OpenAI | $2.00 | $10.00 |
| Azure (the price shown above) | $4.00 | $20.00 |
GPT-5.6 Sol Pro price history
GPT-5.6 Sol Pro has been in our daily price archive since 2026-08-15. Its price series starts on 2026-08-31 at $4.00 input / $20.00 output per 1M tokens, because the earlier snapshots carried a data error that was corrected afterwards. No list price change since 2026-08-31. Last checked against the 2026-09-29 snapshot.
Alternatives to GPT-5.6 Sol Pro
- Next cheaper Frontier model: Claude Sonnet 4 (Anthropic) at $11.40 blended, 25% less.
- Next more expensive: Claude Opus 4.5 (Anthropic) at $19.00 blended, 25% more.
Common questions about GPT-5.6 Sol Pro pricing
- How much does GPT-5.6 Sol Pro cost?
- GPT-5.6 Sol Pro costs $4.00 per million input tokens and $20.00 per million output tokens on the API.
- Does GPT-5.6 Sol Pro offer batch or cached pricing?
- Yes. Batch API pricing is $2.00/M input and $10.00/M output. Prompt-cache reads cost $0.40/M.
- What would GPT-5.6 Sol Pro cost per month?
- For a support-ticket workload (1,500 input + 500 output tokens per request) at 100K requests/month, GPT-5.6 Sol Pro costs about $1.6K at list prices.
- Has the price of GPT-5.6 Sol Pro changed?
- GPT-5.6 Sol Pro has been in our daily price archive since 2026-08-15. Its price series starts on 2026-08-31 at $4.00 input / $20.00 output per 1M tokens, because the earlier snapshots carried a data error that was corrected afterwards. No list price change since 2026-08-31. Last checked against the 2026-09-29 snapshot.
These are list prices: real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.
Build the business case for GPT-5.6 Sol Pro in the AI ROI Calculator: add your business value on top of these costs to get ROI, break-even and payback.
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