GPT-5.6 Sol Pro
OpenAI · released Jul 9, 2026
- Type
- Proprietary
- Input
- $5.00
- Output
- $30.00
- Cached
- $0.50
List price · per 1M tokens · OpenAI at 1.1M context · source ↗
Our take
Written Aug 3, 2026GPT-5.6 Sol Pro is OpenAI's hosted-only flagship that can handle over one million tokens in a single request, accepting text, images and files. It is built for repository-scale documents and complex multimodal analysis, though no independent quality scores are available in our data.
Choose this for extremely long-context workflows where an entire codebase, book or document collection must sit in one prompt, or for multimodal analysis combining images, files and text together. Use it if your enterprise needs Azure infrastructure and compliance. Skip it if cost is a primary concern, if you need downloadable weights, or if you require verified benchmark scores before choosing a model.
The case for it
- One of the largest request limits in our catalogue at 1,050,000 tokens, fitting entire codebases or book-length documents.
- Broad multimodal input: text, images and files in a single prompt.
- Multiple throughput tiers allow latency-cost tradeoffs, with the fastest option nearly twice as quick as the slowest.
The case against it
- Premium pricing across all tiers, with the most expensive option costing four times the base rate for the same model.
- No benchmark scores in our data, so quality claims are unverified.
- Throughput is inconsistent: some higher-priced tiers are slower than cheaper ones.
How good is it?
We hold no score for this model.
We look for every model we track on every board we watch, and none of them has turned up GPT-5.6 Sol Pro — so there is no intelligence, coding, agentic or writing score to show you, not a low one, none.
Or rent it from someone else
Why this differs from the header. The strip above quotes OpenAI's own list price. This is the cheapest live offer at the widest standard context we hold, whoever is serving it — a reseller undercutting a lab is ordinary commerce, not an error.
- per 1M tokens
- $5.00 in / $30.00 out
- Context served
- 1.1M
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenAIflex tier | $2.50 / $15.00 | 1.1M | 118 tok/s | No | Yesunknown period | Unknown |
| OpenRouter | $5.00 / $30.00 | 1.1M | not measured | Unknown | Unknown | Unknown |
| Microsoft Azure AI | $5.00 / $30.00 | 1.1M | 72 tok/s | No | No | Confirmed |
| OpenAI | $5.00 / $30.00 | 1.1M | 67 tok/s | No | Yesunknown period | Unknown |
| Microsoft Azure AIeu | $5.50 / $33.00 | 1.1M | 133 tok/s | No | No | Confirmed |
| OpenAIpriority tier | $10.00 / $60.00 | 1.1M | 101 tok/s | No | Yesunknown period | Unknown |
Microsoft Azure AIAcross the 6 listings we hold: 5 say they do not train on prompts, 0 say they do and 1 do not say. 2 appear in the zero-retention registry we check; the rest are unknown to us rather than confirmed either way.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
- ✓
- Supported
- ✗
- Not supported
- Not published
- host gave no parameter list
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenAIflex | ✓ | ✓ | ✓ |
| OpenRouter | ✓ | ✓ | ✓ |
| Microsoft Azure AI | ✓ | ✓ | ✓ |
| OpenAI | ✓ | ✓ | ✓ |
| Microsoft Azure AIeu | ✓ | ✓ | ✓ |
| OpenAIpriority | ✓ | ✓ | ✓ |
Tool calling: 6 of 6 listings say yes. JSON output: 6 of 6 listings say yes. Strict schema: 6 of 6 listings say yes.
When we formed this view
Dates behind this page
Prices last checked 9d ago
What we do not know about this model yet
- No board we watch has turned up a score, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 6 listings do not say whether they train on prompts.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
Commercial API terms. We hold no licence record for this model, so there is nothing to summarise here.
Identifiers
- Modality record
- text+image+file->text
- Catalogue slug
- openai-gpt-5-6-sol-pro