GPT-5.6 Sol
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 2, 2026OpenAI's top-tier reasoning and coding model can handle a 1,050,000-token request. It is strongest when your team is already using OpenAI's tooling and can use the cheaper first-party tier.
Choose this if frontier reasoning quality fits your budget on the base first-party tier, or if you are committed to Azure and need frontier capability inside your tenancy. Skip it if price tiers confuse your procurement, or if you need consistent pricing across every host.
The case for it
- Base first-party tier is roughly half the input and output price of Claude Opus 5.
- Slightly larger request limit than the one-million-token peers.
The case against it
- Pricing spans multiple tiers and hosts. The same model can cost markedly more depending on the endpoint.
- Not downloadable, so API access only; no self-hosting path.
How good is it?
IntelligencePuzzles, maths, exam questions
Arena Text (overall)8th of 143 · 1482.8via xHigh
CodingWriting and fixing code on its own
Arena Coding8th of 143 · 1527.6via xHigh
AgenticPlanning, calling tools, staying on task
Arena Agent (IPS)3rd of 36 · 0.1via xHigh
WritingWe do not rate this
Two boards come close and neither tests writing: Arena Creative Writing asks people which of two replies they prefer, and LiveBench Language tests whether a model understood a passage. So we show where GPT-5.6 Sol placed and give it no mark out of five.
These tests check whether a model follows instructions — a precondition for all the work above, but not a measure of how well that work is done, which is why they get no rating.
Every published score for this model16 scoresEvery figure we hold, from 16 boards, with who ran it and a link to the source — including the boards no rating above is built on.
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 | 155 tok/s | No | Yesunknown period | Unknown |
| Microsoft Azure AI | $5.00 / $30.00 | 1.1M | 55 tok/s | No | No | Confirmed |
| OpenRouter | $5.00 / $30.00 | 1.1M | not measured | Unknown | Unknown | Unknown |
| OpenAI | $5.00 / $30.00 | 1.1M128K out | 58 tok/s | No | Yesunknown period | Unknown |
| Amazon Bedrockus-east-1 | $5.50 / $33.00 | 1.1M | 39 tok/s | No | No | Unknown |
| Microsoft Azure AIeu | $5.50 / $33.00 | 1.1M | 65 tok/s | No | No | Confirmed |
| OpenAIpriority tier | $10.00 / $60.00 | 1.1M | 84 tok/s | No | Yesunknown period | Unknown |
Microsoft Azure AI
Amazon BedrockAcross the 7 listings we hold: 6 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 | ✓ | ✓ | ✓ |
| Microsoft Azure AI | ✓ | ✓ | ✓ |
| OpenRouter | ✓ | ✓ | ✓ |
| OpenAI | ✓ | ✓ | ✓ |
| Amazon Bedrockus-east-1 | ✓ | ✗ | ✗ |
| Microsoft Azure AIeu | ✓ | ✓ | ✓ |
| OpenAIpriority | ✓ | ✓ | ✓ |
Tool calling: 7 of 7 listings say yes. JSON output: 6 of 7 listings say yes, 1 says no. Strict schema: 6 of 7 listings say yes, 1 says no.
Models people weigh against GPT-5.6 Sol
When we formed this view
Dates behind this page
Prices last checked 9d ago
What we do not know about this model yet
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 7 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